1 Module Overview 1.1 Features 1.2 Description 1.3 Applications 2 Block Diagram 3 Pin Definitions 3.1 Pin Layout 3.2 Pin Description 3.3 Strapping Pins 3.3.1 Chip Boot Mode Control 3.3.2 VDD_SPI Voltage Control 3.3.3 ROM Messages Printing Control 4 Electrical Characteristics 4.1 Absolute Maximum Ratings 4.2 Recommended Operating Conditions 4.3 DC Characteristics (3.3 V, 25 °C) 4.4 Current Consumption Characteristics 4.4.1 Current Consumption in Other Modes 4.5 Wi-Fi RF Characteristics 4.5.1 Wi-Fi RF Standards 4.5.2 Transmitter Characteristics 4.5.3 Receiver Characteristics 5 Module Schematics 6 Peripheral Schematics 7 Physical Dimensions and PCB Land Pattern 7.1 Physical Dimensions 7.2 Recommended PCB Land Pattern 7.3 Dimensions of External Antenna Connector 8 Product Handling 8.1 Storage Conditions 8.2 Electrostatic Discharge (ESD) 8.3 Soldering Profile 8.3.1 Reflow Profile 8.4 Ultrasonic Vibration 9 MAC Addresses and eFuse Related Documentation and Resources Revision History ESP32-S2-WROOM ESP32-S2-WROOM-I Datasheet Version 1.5 2.4 GHz Wi-Fi (802.11 b/g/n) module Built around ESP32-S2 series of SoC, Xtensa ® single-core 32-bit LX7 microprocessor 4 MB flash 37 GPIOs, rich set of peripherals On-board PCB antenna or external antenna connector ESP32-S2-WROOM ESP32-S2-WROOM-I www.espressif.com END OF LIFE (EOL) End of Life (EOL) 1 Module Overview 1 Module Overview Note: Check the link or the QR code to make sure that you use the latest version of this document: https://www.espressif.com/documentation/esp32-s2-wroom_esp32-s2-wroom-i_datasheet_en.pdf 1.1 Features CPU and On-Chip Memory • ESP32-S2 embedded, Xtensa ® single-core 32-bit LX7 microprocessor, up to 240 MHz • 128 KB ROM • 320 KB SRAM • 16 KB SRAM in RTC Wi-Fi • 802.11 b/g/n • Bit rate: 802.11n up to 150 Mbps • A-MPDU and A-MSDU aggregation • 0.4 µs guard interval support • Operating frequency: 2412 ~ 2484 MHz Peripherals • GPIO, SPI, LCD, UART, I2C, I2S, Camera interface, IR, pulse counter, LED PWM, TWAI ® (compatible with ISO 11898-1, i.e. CAN Specification 2.0), full-speed USB OTG, ADC, DAC, touch sensor, temperature sensor Note: * Please refer to ESP32-S2 Series Datasheet for detailed information about the module peripherals. Integrated Components on Module • 40 MHz crystal oscillator • 4 MB SPI flash Antenna Options • On-board PCB antenna (ESP32-S2-WROOM) • External antenna via a connector (ESP32-S2-WROOM-I) Operating Conditions • Operating voltage/Power supply: 3.0 ~ 3.6 V • Operating ambient temperature: –40 ~ 85 °C Certification • RF certification: See certificates for ESP32-S2-WROOM and ESP32-S2-WROOM-I • Green certification: RoHS/REACH Test • HTOL/HTSL/uHAST/TCT/ESD 1.2 Description ESP32-S2-WROOM and ESP32-S2-WROOM-I are two powerful, generic Wi-Fi MCU modules that have a rich set of peripherals. They are an ideal choice for a wide variety of application scenarios related to Internet of Things (IoT), such as embedded systems, smart home, wearable electronics, etc. ESP32-S2-WROOM comes with a PCB antenna (ANT). ESP32-S2-WROOM-I comes with a connector for an Espressif Systems 2 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 1 Module Overview external antenna (CONN). They both feature a 4 MB external SPI flash. The information in this datasheet is applicable to both modules. The ordering information for the two modules is as follows: Table 1: Ordering Information Module Chip Embedded Flash Chip Revision Module Dimensions (mm) ESP32-S2-WROOM (ANT) (EOL) ESP32-S2 4 MB v1.0 18.0 × 31.0 × 3.3 ESP32-S2-WROOM-I (CONN) (EOL) * Modules that operate at higher temperature (–40 °C ~+105 °C) are available for order, embedded with 4 MB flash. At the core of the modules is ESP32-S2 *, an Xtensa® 32-bit LX7 CPU that operates at up to 240 MHz. You can power off the CPU and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of thresholds. ESP32-S2 integrates a rich set of peripherals including SPI, I2S, UART, I2C, LED PWM, TWAI ® controller, ADC, DAC, touch sensor, temperature sensor, as well as up to 43 GPIOs. It also includes a full-speed USB OTG (OTG) interface to enable USB communication. Note: * For more information on ESP32-S2, please refer to ESP32-S2 Series Datasheet. 1.3 Applications • Generic Low-power IoT Sensor Hub • Generic Low-power IoT Data Loggers • Cameras for Video Streaming • Over-the-top (OTT) Devices • USB Devices • Speech Recognition • Image Recognition • Mesh Network • Home Automation • Smart Home Control Panel • Smart Building • Industrial Automation • Smart Agriculture • Audio Applications • Health Care Applications • Wi-Fi-enabled Toys • Wearable Electronics • Retail & Catering Applications • Smart POS Machines Espressif Systems 3 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) Contents Contents 1 Module Overview 2 1.1 Features 2 1.2 Description 2 1.3 Applications 3 2 Block Diagram 8 3 Pin Definitions 9 3.1 Pin Layout 9 3.2 Pin Description 9 3.3 Strapping Pins 11 3.3.1 Chip Boot Mode Control 12 3.3.2 VDD_SPI Voltage Control 12 3.3.3 ROM Messages Printing Control 13 4 Electrical Characteristics 14 4.1 Absolute Maximum Ratings 14 4.2 Recommended Operating Conditions 14 4.3 DC Characteristics (3.3 V, 25 °C) 14 4.4 Current Consumption Characteristics 15 4.4.1 Current Consumption in Other Modes 15 4.5 Wi-Fi RF Characteristics 16 4.5.1 Wi-Fi RF Standards 16 4.5.2 Transmitter Characteristics 17 4.5.3 Receiver Characteristics 17 5 Module Schematics 20 6 Peripheral Schematics 22 7 Physical Dimensions and PCB Land Pattern 23 7.1 Physical Dimensions 23 7.2 Recommended PCB Land Pattern 25 7.3 Dimensions of External Antenna Connector 26 8 Product Handling 27 8.1 Storage Conditions 27 8.2 Electrostatic Discharge (ESD) 27 8.3 Soldering Profile 27 8.3.1 Reflow Profile 27 8.4 Ultrasonic Vibration 28 9 MAC Addresses and eFuse 29 Espressif Systems 4 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) Contents Related Documentation and Resources 30 Revision History 31 Espressif Systems 5 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) List of Tables List of Tables 1 Ordering Information 3 2 Pin Definitions 10 3 Default Configuration of Strapping Pins 11 4 Description of Timing Parameters for the Strapping Pins 12 5 Chip Boot Mode Control 12 6 VDD_SPI Voltage Control 13 7 ROM Messages Printing Control 13 8 Absolute Maximum Ratings 14 9 Recommended Operating Conditions 14 10 DC Characteristics (3.3 V, 25 °C) 14 11 Current Consumption Depending on RF Modes 15 12 Current Consumption in Modem-sleep Mode 15 13 Current Consumption in Low-Power Modes 16 14 Wi-Fi RF Standards 16 15 TX Power with Spectral Mask and EVM Meeting 802.11 Standards 17 16 TX EVM Test 1 17 17 RX Sensitivity 17 18 Maximum RX Level 18 19 RX Adjacent Channel Rejection 19 Espressif Systems 6 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) List of Figures List of Figures 1 ESP32-S2-WROOM Block Diagram 8 2 ESP32-S2-WROOM-I Block Diagram 8 3 Pin Layout (Top View) 9 4 Visualization of Timing Parameters for the Strapping Pins 12 5 ESP32-S2-WROOM Schematics 20 6 ESP32-S2-WROOM-I Schematics 21 7 Peripheral Schematics 22 8 ESP32-S2-WROOM Physical Dimensions 23 9 ESP32-S2-WROOM-I Physical Dimensions 23 10 Recommended PCB Land Pattern 25 11 Dimensions of External Antenna Connector 26 12 Reflow Profile 27 Espressif Systems 7 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 2 Block Diagram 2 Block Diagram ESP32-S2-WROOM-I ESP32-S2-WROOM ESP32-S2-WROVER-I SPICLK SPIHD SPIDO SPIDI SPICS0 SPIWP VDD_SPI SPICS1 VDD_SPI SIO0 SIO1 SIO2 SIO3 ESP32-S2-WROVER QSPI PSRAM QSPI FLASH SPICS0 SPICLK SPIDI SPIDO SPIWP SPIHD VDD_SPI QSPI FLASH SPICS0 SPICLK SPIDI SPIDO SPIWP SPIHD VDD_SPI QSPI FLASH SPICLK SPIHD SPIDO SPIDI SPICS0 SPIWP VDD_SPI SPICS1 VDD_SPI SIO0 SIO1 SIO2 SIO3 QSPI PSRAM QSPI FLASH SPICLK SPICLK RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 Figure 1: ESP32-S2-WROOM Block Diagram ESP32-S2-WROOM-I ESP32-S2-WROOM ESP32-S2-WROVER-I SPICLK SPIHD SPIDO SPIDI SPICS0 SPIWP VDD_SPI SPICS1 VDD_SPI SIO0 SIO1 SIO2 SIO3 ESP32-S2-WROVER QSPI PSRAM QSPI FLASH SPICS0 SPICLK SPIDI SPIDO SPIWP SPIHD VDD_SPI QSPI FLASH SPICS0 SPICLK SPIDI SPIDO SPIWP SPIHD VDD_SPI QSPI FLASH SPICLK SPIHD SPIDO SPIDI SPICS0 SPIWP VDD_SPI SPICS1 VDD_SPI SIO0 SIO1 SIO2 SIO3 QSPI PSRAM QSPI FLASH SPICLK SPICLK RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 RF Matching 40 MHz Crystal 3V3 EN GPIOs Antenna ESP32-S2 Figure 2: ESP32-S2-WROOM-I Block Diagram Espressif Systems 8 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 3 Pin Definitions 3.1 Pin Layout The pin diagram below shows the approximate location of pins on the module. For the actual diagram drawn to scale, please refer to Figure 7.1 Physical Dimensions. 1 GND 2 3V3 3 IO0 4IO1 5 IO2 6 IO3 Keepout Zone 7 IO4 8 IO5 9 IO6 10 IO7 11 IO8 12 IO9 13 IO10 14IO11 15 IO12 16 IO13 42 GND 41 EN 40 IO46 39 IO45 38 RXD0 37 TXD0 36 IO42 35 IO41 34 IO40 33 IO39 32 IO38 31 IO37 30 IO36 29 IO35 28 IO34 27 IO33 Pin 43 GND GND GND GND GND GND GNDGNDGND 17 IO14 18 IO15 19 IO16 20 IO17 21IO18 22 IO19 23 IO20 24IO21 25 IO26 26 GND Figure 3: Pin Layout (Top View) 3.2 Pin Description The module has 42 pins. See pin definitions in Table 2 Pin Definitions. For peripheral pin configurations, please refer to ESP32-S2 Series Datasheet > Section Peripheral Pin Configurations. Espressif Systems 9 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 2: Pin Definitions Name No. Type 1 Function GND 1 P Ground 3V3 2 P Power supply IO0 3 I/O/T RTC_GPIO0, GPIO0 IO1 4 I/O/T RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0 IO2 5 I/O/T RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1 IO3 6 I/O/T RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2 IO4 7 I/O/T RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3 IO5 8 I/O/T RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4 IO6 9 I/O/T RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5 IO7 10 I/O/T RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6 IO8 11 I/O/T RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7 IO9 12 I/O/T RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD IO10 13 I/O/T RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 IO11 14 I/O/T RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 IO12 15 I/O/T RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 IO13 16 I/O/T RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 IO14 17 I/O/T RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS IO15 18 I/O/T RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4, XTAL_32K_P IO16 19 I/O/T RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5, XTAL_32K_N IO17 20 I/O/T RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6, DAC_1 IO18 21 I/O/T RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, DAC_2, CLK_OUT3 IO19 22 I/O/T RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D- IO20 23 I/O/T RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+ IO21 24 I/O/T RTC_GPIO21, GPIO21 IO26 25 I/O/T SPICS1, GPIO26 GND 26 P Ground IO33 27 I/O/T SPIIO4, GPIO33, FSPIHD IO34 28 I/O/T SPIIO5, GPIO34, FSPICS0 IO35 29 I/O/T SPIIO6, GPIO35, FSPID IO36 30 I/O/T SPIIO7, GPIO36, FSPICLK IO37 31 I/O/T SPIDQS, GPIO37, FSPIQ IO38 32 I/O/T GPIO38, FSPIWP IO39 33 I/O/T MTCK, GPIO39, CLK_OUT3 IO40 34 I/O/T MTDO, GPIO40, CLK_OUT2 IO41 35 I/O/T MTDI, GPIO41, CLK_OUT1 IO42 36 I/O/T MTMS, GPIO42 TXD0 37 I/O/T U0TXD, GPIO43, CLK_OUT1 RXD0 38 I/O/T U0RXD, GPIO44, CLK_OUT2 IO45 39 I/O/T GPIO45 IO46 40 I GPIO46 Cont’d on next page Espressif Systems 10 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 2 – cont’d from previous page Name No. Type 1 Function EN 41 I High: on, enables the chip. Low: off, the chip powers off. Note: Do not leave the EN pin floating. GND 42 P Ground 1 P: power supply; I: input; O: output; T: high impedance. 3.3 Strapping Pins Note: The content below is excerpted from ESP32-S2 Series Datasheet > Section Strapping Pins. For the strapping pin mapping between the chip and modules, please refer to Chapter 5 Module Schematics. At each startup or reset, a module requires some initial configuration parameters, such as in which boot mode to load the module, voltage of flash memory, etc. These parameters are passed over via the strapping pins. After reset, the strapping pins operate as regular IO pins. The parameters controlled by the given strapping pins at module reset are as follows: • Chip boot mode – GPIO0 and GPIO46 • VDD_SPI voltage – GPIO45 • ROM messages printing – GPIO46 GPIO0, GPIO45, and GPIO46 are connected to the chip’s internal weak pull-up/pull-down resistors at chip reset. These resistors determine the default bit values of the strapping pins. Also, these resistors determine the bit values if the strapping pins are connected to an external high-impedance circuit. Table 3: Default Configuration of Strapping Pins Strapping Pin Default Configuration Bit Value GPIO0 Pull-up 1 GPIO45 Pull-down 0 GPIO46 Pull-down 0 To change the bit values, the strapping pins should be connected to external pull-down/pull-up resistances. If the ESP32-S2 is used as a device by a host MCU, the strapping pin voltage levels can also be controlled by the host MCU. All strapping pins have latches. At system reset, the latches sample the bit values of their respective strapping pins and store them until the chip is powered down or shut down. The states of latches cannot be changed in any other way. It makes the strapping pin values available during the entire chip operation, and the pins are freed up to be used as regular IO pins after reset. Regarding the timing requirements for the strapping pins, there are such parameters as setup time and hold time. For more information, see Table 4 and Figure 4. Espressif Systems 11 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 4: Description of Timing Parameters for the Strapping Pins Parameter Description Min (ms) t SU Setup time is the time reserved for the power rails to stabilize before the CHIP_PU pin is pulled high to activate the chip. 0 t H Hold time is the time reserved for the chip to read the strapping pin values after CHIP_PU is already high and before these pins start operating as regular IO pins. 3 Strapping pin VIL_nRST VIH t SU t H CHIP_PU Figure 4: Visualization of Timing Parameters for the Strapping Pins 3.3.1 Chip Boot Mode Control GPIO0 and GPIO46 control the boot mode after the reset is released. See Table 5 Chip Boot Mode Control. Table 5: Chip Boot Mode Control Boot Mode GPIO0 GPIO46 Default configuration 1 (Pull-up) 0 (Pull-down) SPI Boot (default) 1 Any value Download Boot 0 0 Invalid combination 1 0 1 1 This combination triggers unexpected behavior and should be avoided. 3.3.2 VDD_SPI Voltage Control Depending on the value of EFUSE_VDD_SPI_FORCE, the voltage can be controlled in two ways. Espressif Systems 12 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 6: VDD_SPI Voltage Control EFUSE_VDD_SPI_FORCE GPIO45 eFuse 1 Voltage VDD_SPI power source 2 0 0 Ignored 3.3 V VDD3P3_RTC_IO via R SP I 1 1.8 V Flash Voltage Regulator 1 Ignored 0 1.8 V Flash Voltage Regulator 1 3.3 V VDD3P3_RTC_IO via R SP I 1 eFuse: EFUSE_VDD_SPI_TIEH 2 See ESP32-S2 Series Datasheet > Section Power Scheme 3.3.3 ROM Messages Printing Control During boot process the messages by the ROM code can be printed to: • (Default) U0TXD pin. For this, EFUSE_UART_PRINT_CONTROL should be 0. • DAC_1 pin. For this, EFUSE_UART_PRINT_CONTROL should be 1. EFUSE_UART_PRINT_CONTROL and GPIO46 control ROM messages printing as shown in Table 7 ROM Messages Printing Control. Table 7: ROM Messages Printing Control eFuse 1 GPIO46 ROM Messages Printing 0 Ignored Always enabled 1 0 Enabled 1 Disabled 2 0 Disabled 1 Enabled 3 Ignored Always disabled 1 eFuse: EFUSE_UART_PRINT_CONTROL Espressif Systems 13 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 4 Electrical Characteristics 4.1 Absolute Maximum Ratings Stresses above those listed in Table 8 Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under Table 9 Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Table 8: Absolute Maximum Ratings Symbol Parameter Min Max Unit VDD33 Power supply voltage –0.3 3.6 V T ST OR E Storage temperature –40 85 °C 4.2 Recommended Operating Conditions Table 9: Recommended Operating Conditions Symbol Parameter Min Typ Max Unit VDD33 Power supply voltage 3.0 3.3 3.6 V I V DD Current delivered by external power supply 0.5 — — A T A Operating ambient temperature –40 — 85 °C 4.3 DC Characteristics (3.3 V, 25 °C) Table 10: DC Characteristics (3.3 V, 25 °C) Symbol Parameter Min Typ Max Unit C IN Pin capacitance — 2 — pF V IH High-level input voltage 0.75 × VDD 1 — VDD 1 + 0.3 V V IL Low-level input voltage –0.3 — 0.25 × VDD 1 V I IH High-level input current — — 50 nA I IL Low-level input current — — 50 nA V OH 2 High-level output voltage 0.8 × VDD 1 — — V V OL 2 Low-level output voltage — — 0.1 × VDD 1 V I OH High-level source current (VDD 1 = 3.3 V, V OH >= 2.64 V, PAD_DRIVER = 3) — 40 — mA I OL Low-level sink current (VDD 1 = 3.3 V, V OL = 0.495 V, PAD_DRIVER = 3) — 28 — mA R P U Pull-up resistor — 45 — kΩ R P D Pull-down resistor — 45 — kΩ V IH_nRST Chip reset release voltage 0.75 × VDD 1 — VDD 1 + 0.3 V V IL_nRST Chip reset voltage –0.3 — 0.25 × VDD 1 V Espressif Systems 14 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 1 VDD is the I/O voltage for pins of a particular power domain. 2 V OH and V OL are measured using high-impedance load. 4.4 Current Consumption Characteristics Owing to the use of advanced power-management technologies, the module can switch between different power modes. For details on different power modes, please refer to Section RTC and Low-Power Management in ESP32-S2 Series Datasheet. Table 11: Current Consumption Depending on RF Modes Work mode Description Peak (mA) Active (RF working) TX 802.11b, 20 MHz, 1 Mbps, @19.5 dBm 340 802.11g, 20 MHz, 54 Mbps, @15 dBm 315 802.11n, 20 MHz, MCS7, @13.5 dBm 298 802.11n, 40 MHz, MCS7, @13.5 dBm 300 RX 802.11b/g/n, 20 MHz 81 802.11n, 40 MHz 88 1 The current consumption measurements are taken with a 3.3 V supply at 25 °C of ambient temperature at the RF port. All transmitters’ measurements are based on 100% duty cycle. 2 The current consumption figures in RX mode are for cases where the peripherals are disabled and the CPU idle. Note: The content below is excerpted from Section Power Consumption in Other Modes in ESP32-S2 Series Datasheet. 4.4.1 Current Consumption in Other Modes The measurements below are applicable to ESP32-S2, ESP32-S2FH2, and ESP32-S2FH4. Since ESP32-S2FN4R2 and ESP32-S2R2 come with in-package PSRAM, their current consumption might be higher. Table 12: Current Consumption in Modem-sleep Mode Typ Mode CPU Frequency (MHz) Description All Peripherals Clocks Disabled (mA) All Peripherals Clocks Enabled (mA) 1 Modem-sleep 2,3 240 CPU is idle 20.0 28.0 CPU is running 23.0 32.0 160 CPU is idle 14.0 21.0 CPU is running 16.0 24.0 80 CPU is idle 10.5 18.4 CPU is running 12.0 20.0 Cont’d on next page Espressif Systems 15 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 12 – cont’d from previous page Typ Mode CPU Frequency (MHz) Description All Peripherals Clocks Disabled (mA) All Peripherals Clocks Enabled (mA) 1 1 In practice, the current consumption might be different depending on which peripherals are enabled. 2 In Modem-sleep mode, Wi-Fi is clock gated. 3 In Modem-sleep mode, the consumption might be higher when accessing flash. For a flash rated at 80 Mbit/s, in SPI 2-line mode the consumption is 10 mA. Table 13: Current Consumption in Low-Power Modes Work mode Description Typ (µA) Light-sleep 1 VDD_SPI and Wi-Fi are powered down, and all GPIOs are high-impedance 750 Deep-sleep The ULP co-processor is powered on 2 ULP-FSM 170 ULP-RISC-V 190 ULP sensor-monitored pattern 3 22 RTC timer + RTC memory 25 RTC timer only 20 Power off CHIP_PU is set to low level, the chip is powered off 1 1 In Light-sleep mode, with all related SPI pins pulled up, the current consumption of the embedded PSRAM is 140 µA. Chip variants with in-package PSRAM include ESP32-S2FN4R2 and ESP32-S2R2. 2 During Deep-sleep, when the ULP co-processor is powered on, peripherals such as GPIO and I2C are able to operate. 3 The “ULP sensor-monitored pattern” refers to the mode where the ULP coprocessor or the sensor works periodically. When touch sensors work with a duty cycle of 1%, the typical current consumption is 22 µA. 4.5 Wi-Fi RF Characteristics 4.5.1 Wi-Fi RF Standards Table 14: Wi-Fi RF Standards Name Description Center frequency range of operating channel 1 2412 ~ 2484 MHz Wi-Fi wireless standard IEEE 802.11b/g/n Data rate 20 MHz 802.11b: 1, 2, 5.5 and 11 Mbps 802.11g: 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11n: MCS0-7, 72.2 Mbps (Max) 40 MHz 802.11n: MCS0-7, 150 Mbps (Max) Antenna type PCB antenna, external antenna connector 1 Device should operate in the center frequency range allocated by regional regulatory authorities. Target center frequency range is configurable by software. 2 For the modules that use external antenna connectors, the output impedance is 50 Ω. For other modules without external antenna connectors, the output impedance is irrelevant. Espressif Systems 16 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 4.5.2 Transmitter Characteristics Target TX power is configurable based on device or certification requirements. The default characteristics are provided in Table 15. Table 15: TX Power with Spectral Mask and EVM Meeting 802.11 Standards Min Typ Max Rate (dBm) (dBm) (dBm) 802.11b, 1 Mbps, DSSS — 19.5 — 802.11b, 11 Mbps, CCK — 19.5 — 802.11g, 6 Mbps, OFDM — 18.0 — 802.11g, 54 Mbps, OFDM — 17.5 — 802.11n, HT20, MCS0 — 18.0 — 802.11n, HT20, MCS7 — 17.0 — 802.11n, HT40, MCS0 — 18.0 — 802.11n, HT40, MCS7 — 16.5 — Table 16: TX EVM Test 1 Min Typ Limit Rate (dB) (dB) (dB) 802.11b, 1 Mbps, DSSS — –24.0 –10.0 802.11b, 11 Mbps, CCK — –24.0 –10.0 802.11g, 6 Mbps, OFDM — –25.0 –5.0 802.11g, 54 Mbps, OFDM — –28.0 –25.0 802.11n, HT20, MCS0 — –25.0 –5.0 802.11n, HT20, MCS7 — –30.0 –27.0 802.11n, HT40, MCS0 — –25.0 –5.0 802.11n, HT40, MCS7 — –30.0 –27.0 1 EVM is measured at the corresponding typical TX power provided in Table 15 TX Power with Spectral Mask and EVM Meeting 802.11 Standards above. 4.5.3 Receiver Characteristics Table 17: RX Sensitivity Min Typ Max Rate (dBm) (dBm) (dBm) 802.11b, 1 Mbps, DSSS — –96.0 — 802.11b, 2 Mbps, DSSS — –93.5 — 802.11b, 5.5 Mbps, CCK — –91.5 — 802.11b, 11 Mbps, CCK — –87.0 — 802.11g, 6 Mbps, OFDM — –91.5 — Cont’d on next page Espressif Systems 17 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 17 – cont’d from previous page Min Typ Max Rate (dBm) (dBm) (dBm) 802.11g, 9 Mbps, OFDM — –90.0 — 802.11g, 12 Mbps, OFDM — –88.0 — 802.11g, 18 Mbps, OFDM — –86.0 — 802.11g, 24 Mbps, OFDM — –83.0 — 802.11g, 36 Mbps, OFDM — –79.0 — 802.11g, 48 Mbps, OFDM — –75.0 — 802.11g, 54 Mbps, OFDM — –73.5 — 802.11n, HT20, MCS0 — –91.0 — 802.11n, HT20, MCS1 — –87.5 — 802.11n, HT20, MCS2 — –85.0 — 802.11n, HT20, MCS3 — –82.0 — 802.11n, HT20, MCS4 — –78.5 — 802.11n, HT20, MCS5 — –74.5 — 802.11n, HT20, MCS6 — –72.5 — 802.11n, HT20, MCS7 — –71.5 — 802.11n, HT40, MCS0 — –87.5 — 802.11n, HT40, MCS1 — –85.0 — 802.11n, HT40, MCS2 — –82.5 — 802.11n, HT40, MCS3 — –78.5 — 802.11n, HT40, MCS4 — –75.0 — 802.11n, HT40, MCS5 — –71.0 — 802.11n, HT40, MCS6 — –69.5 — 802.11n, HT40, MCS7 — –68.5 — Table 18: Maximum RX Level Min Typ Max Rate (dBm) (dBm) (dBm) 802.11b, 1 Mbps, DSSS — 5 — 802.11b, 11 Mbps, CCK — 5 — 802.11g, 6 Mbps, OFDM — 5 — 802.11g, 54 Mbps, OFDM — 0 — 802.11n, HT20, MCS0 — 5 — 802.11n, HT20, MCS7 — 0 — 802.11n, HT40, MCS0 — 5 — 802.11n, HT40, MCS7 — 0 — Espressif Systems 18 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions Table 19: RX Adjacent Channel Rejection Min Typ Max Rate (dB) (dB) (dB) 802.11b, 1 Mbps, DSSS — 35 — 802.11b, 11 Mbps, CCK — 35 — 802.11g, 6 Mbps, OFDM — 31 — 802.11g, 54 Mbps, OFDM — 14 — 802.11n, HT20, MCS0 — 31 — 802.11n, HT20, MCS7 — 13 — 802.11n, HT40, MCS0 — 19 — 802.11n, HT40, MCS7 — 8 — Espressif Systems 19 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 5 Module Schematics This is the reference design of the module. 5 5 4 4 3 3 2 2 1 1 D D C C B B A A Pin.2 3V3 Pin.41 EN Pin.42 GND Pin.3 IO0 Pin.4 IO1 Pin.5 IO2 Pin.6 IO3 Pin.7 IO4 Pin.8 IO5 Pin.9 IO6 Pin.10 IO7 Pin.11 IO8 Pin.12 IO9 Pin.14 IO11 Pin.15 IO12 Pin.13 IO10 Pin.18 IO15 Pin.19 IO16 Pin.16 IO13 Pin.21 IO18 Pin.22 IO19 Pin.37 TXD0 Pin.20 IO17 Pin.23 IO20 Pin.36 IO42 Pin.28 IO34 Pin.32 IO38 Pin.27 IO33 Pin.24 IO21 Pin.35 IO41 Pin.30 IO36 Pin.25 IO26 Pin.34 IO40 Pin.29 IO35 Pin.33 IO39 Pin.31 IO37 Pin.1 GND PCB ANTENNA Flash and PSRAM Pin.38 RXD0 Pin.39 IO45 Pin.40 IO46 Pin.17 IO14 Pin.26 GND The values of C1 and C4 vary with the selection of the crystal. The value of R4 varies with the actual PCB board. NC: No component. The values of C11, L2 and C12 vary with the actual PCB board. EPAD ESP32-S2-WROOM(pin-out) 50 ohm Impedance Control SPICLK SPICS0 SPIHD SPICS1 SPICLK SPIHD GPIO0 GPIO1 GPIO4 GPIO5 GPIO36 GPIO19 GPIO41 GPIO40 GPIO42 GPIO39 GPIO37 GPIO12 GPIO14 GPIO15 GPIO16 GPIO17 U0TXD CHIP_PU GPIO2 GPIO3 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 GPIO11 GPIO20 GPIO18 GPIO21 GPIO35 GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 GPIO11 GPIO12 GPIO13 GPIO14 GPIO15 GPIO16 GPIO17 GPIO18 GPIO19 GPIO20 GPIO21 GPIO33 GPIO34 GPIO35 GPIO36 GPIO37 GPIO38 SPIHD SPIWP SPID SPIQ SPICS1GPIO26 SPICS0 LNA_IN ANT2 ANT1 RF_ANT GPIO39 GPIO40 GPIO41 GPIO42 GPIO46 CHIP_PU GPIO45 U0TXD GPIO33 GPIO34 GPIO38 U0RXD GPIO45 GPIO46 GPIO26 U0RXD GPIO13 SPICLK SPID SPIQ SPIWP SPIWP SPID SPIQ VDD_SPI VDD_SPI GND GND VDD33 GND GND GND GND GND GND VDD33 GND GND GND GNDGND GND GND VDD33 VDD33 GND GNDGND VDD33 GND GNDGND VDD33 GND VDD_SPI VDD33 GND GND GND GND GND VDD33 VDD33 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 R2 0 C11 TBD C13 0.1uF C12 TBD C4 TBD R3 499 C14 1uF R8 10K(NC) C9 0.1uF U1 ESP32-S2 VDDA 1 LNA_IN 2 VDD3P3 3 VDD3P3 4 GPIO0 5 GPIO1 6 GPIO2 7 GPIO3 8 GPIO4 9 GPIO5 10 GPIO6 11 GPIO7 12 GPIO10 15 GPIO11 16 GPIO12 17 GPIO13 18 GPIO14 19 XTAL_32K_P 21 VDD3P3_RTC 20 XTAL_32K_N 22 DAC_1 23 DAC_2 24 GPIO19 25 GPIO20 26 VDD_SPI 30 SPICS1 29 SPIW P 32 SPICS0 33 SPIQ 35 SPID 36 SPICLK 34 GPIO33 37 GND 57 GPIO34 38 GPIO35 39 MTCK 43 GPIO46 55 VDDA 51 XTAL_N 52 XTAL_P 53 MTMS 47 MTDO 44 U0TXD 48 VDD3P3_CPU 45 CHIP_PU 56 VDDA 54 MTDI 46 GPIO8 13 GPIO9 14 VDD3P3_RTC_IO 27 GPIO21 28 SPIHD 31 GPIO36 40 GPIO37 41 GPIO38 42 U0RXD 49 GPIO45 50 L1 2.0nH C6 10uF C2 100pF Y1 40MHz(±10ppm) XIN 1 GND 2 XOUT 3 GND 4 C10 0.1uF U2 FLASH-3V3 VDD 8 GND 4 /CS 1 CLK 6 /HOLD 7 /WP 3 DO 2 DI 5 R1 10K(NC) R7 0 D1 ESD C7 1uF L2 TBD ANT2 PCB_ANT 1 2 C1 TBD U3 PSRAM-3V3(NC) VDD 8 VSS 4 CS 1 SCLK 6 SIO3 7 SIO2 3 SO/SIO1 2 SI/SIO0 5 R10 0 ANT1 CONN(NC) 1 2 3 C16 0.1uF C3 1uF R6 0(NC) C15 0.1uF R4 0 C5 0.1uF R9 10K(NC) C8 0.1uF Figure 5: ESP32-S2-WROOM Schematics Espressif Systems 20 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 3 Pin Definitions 5 5 4 4 3 3 2 2 1 1 D D C C B B A A Pin.2 3V3 Pin.41 EN Pin.42 GND Pin.3 IO0 Pin.4 IO1 Pin.5 IO2 Pin.6 IO3 Pin.7 IO4 Pin.8 IO5 Pin.9 IO6 Pin.10 IO7 Pin.11 IO8 Pin.12 IO9 Pin.14 IO11 Pin.15 IO12 Pin.13 IO10 Pin.18 IO15 Pin.19 IO16 Pin.16 IO13 Pin.21 IO18 Pin.22 IO19 Pin.37 TXD0 Pin.20 IO17 Pin.23 IO20 Pin.36 IO42 Pin.28 IO34 Pin.32 IO38 Pin.27 IO33 Pin.24 IO21 Pin.35 IO41 Pin.30 IO36 Pin.25 IO26 Pin.34 IO40 Pin.29 IO35 Pin.33 IO39 Pin.31 IO37 Pin.1 GND PCB ANTENNA Flash and PSRAM Pin.38 RXD0 Pin.39 IO45 Pin.40 IO46 Pin.17 IO14 Pin.26 GND The values of C1 and C4 vary with the selection of the crystal. The value of R4 varies with the actual PCB board. NC: No component. The values of C11, L2 and C12 vary with the actual PCB board. EPAD 50 ohm Impedance Control ESP32-S2-WROOM-I(pin-out) SPICLK SPICS0 SPIHD SPICS1 SPICLK SPIHD GPIO0 GPIO1 GPIO4 GPIO5 GPIO36 GPIO19 GPIO41 GPIO40 GPIO42 GPIO39 GPIO37 GPIO12 GPIO14 GPIO15 GPIO16 GPIO17 U0TXD CHIP_PU GPIO2 GPIO3 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 GPIO11 GPIO20 GPIO18 GPIO21 GPIO35 GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 GPIO11 GPIO12 GPIO13 GPIO14 GPIO15 GPIO16 GPIO17 GPIO18 GPIO19 GPIO20 GPIO21 GPIO33 GPIO34 GPIO35 GPIO36 GPIO37 GPIO38 SPIHD SPIWP SPID SPIQ SPICS1GPIO26 SPICS0 LNA_IN ANT2 ANT1 RF_ANT GPIO39 GPIO40 GPIO41 GPIO42 GPIO46 CHIP_PU GPIO45 U0TXD GPIO33 GPIO34 GPIO38 U0RXD GPIO45 GPIO46 GPIO26 U0RXD GPIO13 SPICLK SPID SPIQ SPIWP SPIWP SPID SPIQ VDD_SPI VDD_SPI GND GND VDD33 GND GND GND GND GND GND VDD33 GND GND GND GNDGND GND GND VDD33 VDD33 GND GNDGND VDD33 GND GNDGND VDD33 GND VDD_SPI VDD33 GND GND GND GND GND VDD33 VDD33 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 Title Size Page Name R ev Date: Sheet o f Confidential and Proprietary <02_ESP32-S2-WROVER> V1.7 C 2 2Wednesday, July 26, 2023 R2 0 C11 TBD C13 0.1uF C12 TBD C4 TBD R3 499 C14 1uF R8 10K(NC) C9 0.1uF U1 ESP32-S2 VDDA 1 LNA_IN 2 VDD3P3 3 VDD3P3 4 GPIO0 5 GPIO1 6 GPIO2 7 GPIO3 8 GPIO4 9 GPIO5 10 GPIO6 11 GPIO7 12 GPIO10 15 GPIO11 16 GPIO12 17 GPIO13 18 GPIO14 19 XTAL_32K_P 21 VDD3P3_RTC 20 XTAL_32K_N 22 DAC_1 23 DAC_2 24 GPIO19 25 GPIO20 26 VDD_SPI 30 SPICS1 29 SPIW P 32 SPICS0 33 SPIQ 35 SPID 36 SPICLK 34 GPIO33 37 GND 57 GPIO34 38 GPIO35 39 MTCK 43 GPIO46 55 VDDA 51 XTAL_N 52 XTAL_P 53 MTMS 47 MTDO 44 U0TXD 48 VDD3P3_CPU 45 CHIP_PU 56 VDDA 54 MTDI 46 GPIO8 13 GPIO9 14 VDD3P3_RTC_IO 27 GPIO21 28 SPIHD 31 GPIO36 40 GPIO37 41 GPIO38 42 U0RXD 49 GPIO45 50 L1 2.0nH C6 10uF C2 100pF Y1 40MHz(±10ppm) XIN 1 GND 2 XOUT 3 GND 4 C10 0.1uF U2 FLASH-3V3 VDD 8 GND 4 /CS 1 CLK 6 /HOLD 7 /WP 3 DO 2 DI 5 R1 10K(NC) R7 0(NC) D1 ESD C7 1uF L2 TBD ANT2 PCB_ANT 1 2 C1 TBD U3 PSRAM-3V3(NC) VDD 8 VSS 4 CS 1 SCLK 6 SIO3 7 SIO2 3 SO/SIO1 2 SI/SIO0 5 R10 0 ANT1 CONN 1 2 3 C16 0.1uF C3 1uF R6 0 C15 0.1uF R4 0 C5 0.1uF R9 10K(NC) C8 0.1uF Figure 6: ESP32-S2-WROOM-I Schematics Espressif Systems 21 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 6 Peripheral Schematics 6 Peripheral Schematics This is the typical application circuit of the module connected with peripheral components (for example, power supply, antenna, reset button, JTAG interface, and UART interface). 5 5 4 4 3 3 2 2 1 1 D D C C B B A A X1: ESR = Max. 70 K NC: No component. EN IO0 IO12 IO13 IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8 IO9 IO10 IO11 IO42 IO41 IO37 IO36 IO38 IO40 IO39 IO14 IO15 IO16 IO17 IO18 IO19 IO20 IO21 IO46 RXD0 TXD0 IO45 EN IO35 IO34 IO33 TMS TDI TDO TCK IO0 USB_D+ USB_D- GND GND GND VDD33 GND GND GND GND VDD33 GND GND GND GND GND GND JP3 USB OTG 1 2 C3 0.1uF SW1 R3 0(NC) C2 TBD U1 ESP32-S2-WROOM/ESP32-S2-WROOM-I GND 1 3V3 2 IO0 3 IO1 4 IO2 5 IO3 6 IO4 7 IO5 8 IO6 9 IO7 10 IO8 11 IO9 12 IO10 13 IO11 14 GND 42 IO45 39 RXD0 38 TXD0 37 IO42 36 IO41 35 IO40 34 IO39 33 IO38 32 IO37 31 IO36 30 IO35 29 IO34 28 IO33 27 IO14 17 IO15 18 IO16 19 IO17 20 IO18 21 IO19 22 IO20 23 IO21 24 IO26 25 GND 26 EPAD 43 IO12 15 IO13 16 EN 41 IO46 40 C7 12pF(NC) C6 20pF(NC) R7 0 R4 0 R2 NC X1 32.768KHz(NC) 12 JP4 Boot Option 1 2 R1 TBD C5 20pF(NC) JP1 UART 1 1 2 2 3 3 4 4 C4 12pF(NC) C1 22uF C8 0.1uF R5 0(NC) R6 0 JP2 JTAG 1 1 2 2 3 3 4 4 Figure 7: Peripheral Schematics • Soldering the EPAD to the ground of the base board is not a must, however, it can optimize thermal performance. If you choose to solder it, please apply the correct amount of soldering paste. Too much soldering paste may increase the gap between the module and the baseboard. As a result, the adhesion between other pins and the baseboard may be poor. • To ensure that the power supply to the ESP32-S2 chip is stable during power-up, it is advised to add an RC delay circuit at the EN pin. The recommended setting for the RC delay circuit is usually R = 10 kΩ and C = 1 µF. However, specific parameters should be adjusted based on the power-up timing of the module and the power-up and reset sequence timing of the chip. For ESP32-S2’s power-up and reset sequence timing diagram, please refer to ESP32-S2 Series Datasheet > Section Power Scheme. Espressif Systems 22 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 7 Physical Dimensions and PCB Land Pattern 7 Physical Dimensions and PCB Land Pattern 7.1 Physical Dimensions 31±0.2 18±0.2 0.8 3.3±0.15 1.5 42 x 0.45 42 x 0.9 42 x 0.85 4 Top View Side View Bottom View 6.22 22.9 15.84 19.3 10.44 13.5 42 x Ø0.55 42 x 0.9 1.08 1.08 1 22.5 4 7.81 15.45 0.5 1 1 1.5 2.25 31±0.2 18±0.2 0.8 3.3±0.15 1.5 42 x 0.45 42 x 0.9 42 x 0.85 4 Top View Side View Bottom View 6.22 22.9 15.84 19.3 10.44 13.5 Unit: mm 42 x Ø0.55 42 x 0.9 1.08 1.08 1 22.5 15.45 4 7.81 2.25 0.5 1 1.5 1 8.35 2.25 Unit: mm Figure 8: ESP32-S2-WROOM Physical Dimensions 31±0.2 18±0.2 0.8 3.3±0.15 1.5 42 x 0.45 42 x 0.9 42 x 0.85 4 Top View Side View Bottom View 6.22 22.9 15.84 19.3 10.44 13.5 42 x Ø0.55 42 x 0.9 1.08 1.08 1 22.5 4 7.81 15.45 0.5 1 1 1.5 2.25 31±0.2 18±0.2 0.8 3.3±0.15 1.5 42 x 0.45 42 x 0.9 42 x 0.85 4 Top View Side View Bottom View 6.22 22.9 15.84 19.3 10.44 13.5 Unit: mm 42 x Ø0.55 42 x 0.9 1.08 1.08 1 22.5 15.45 4 7.81 2.25 0.5 1 1.5 1 8.35 2.25 Unit: mm Figure 9: ESP32-S2-WROOM-I Physical Dimensions Espressif Systems 23 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 7 Physical Dimensions and PCB Land Pattern Note: For information about tape, reel, and product marking, please refer to Espressif Module Packaging Information. Espressif Systems 24 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 7 Physical Dimensions and PCB Land Pattern 7.2 Recommended PCB Land Pattern Unit: mm Via for thermal pad Copper 42 x 0.9 42 x 1.5 Antenna Area 18 6.22 1 17 26 42 7.5 31 1.5 17.5 2.25 2.25 0.5 1.5 0.5 1 22.5 4 4 7.81 1 15.45 1 0.5 Figure 10: Recommended PCB Land Pattern Espressif Systems 25 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 7 Physical Dimensions and PCB Land Pattern 7.3 Dimensions of External Antenna Connector ESP32-S2-WROOM-I uses the first generation external antenna connector as shown in Figure 11 Dimensions of External Antenna Connector. This connector is compatible with the following connectors: • U.FL Series connector from Hirose • MHF I connector from I-PEX • AMC connector from Amphenol Unit: mm Figure 11: Dimensions of External Antenna Connector Espressif Systems 26 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 8 Product Handling 8 Product Handling 8.1 Storage Conditions The products sealed in moisture barrier bags (MBB) should be stored in a non-condensing atmospheric environment of < 40 °C and 90%RH. The module is rated at the moisture sensitivity level (MSL) of 3. After unpacking, the module must be soldered within 168 hours with the factory conditions 25±5 °C and 60%RH. If the above conditions are not met, the module needs to be baked. 8.2 Electrostatic Discharge (ESD) • Human body model (HBM): ±2000 V • Charged-device model (CDM): ±500 V 8.3 Soldering Profile 8.3.1 Reflow Profile Solder the module in a single reflow. 50 150 0 25 1 ~ 3 ℃/s 0 200 250 200 –1 ~ –5 ℃/s Cooling zone 100 217 50 100 250 Reflow zone 217 ℃ 60 ~ 90 s Temperature (℃) Preheating zone 150 ~ 200 ℃ 60 ~ 120 s Ramp-up zone Peak Temp. 235 ~ 250 ℃ Soldering time > 30 s Time (sec.) Ramp-up zone — Temp.: 25 ~ 150 ℃ Time: 60 ~ 90 s Ramp-up rate: 1 ~ 3 ℃/s Preheating zone — Temp.: 150 ~ 200 ℃ Time: 60 ~ 120 s Reflow zone — Temp.: >217 ℃ 60 ~ 90 s; Peak Temp.: 235 ~ 250 ℃ Time: 30 ~ 70 s Cooling zone — Peak Temp. ~ 180 ℃ Ramp-down rate: –1 ~ –5 ℃/s Solder — Sn-Ag-Cu (SAC305) lead-free solder alloy Figure 12: Reflow Profile Espressif Systems 27 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 8 Product Handling 8.4 Ultrasonic Vibration Avoid exposing Espressif modules to vibration from ultrasonic equipment, such as ultrasonic welders or ultrasonic cleaners. This vibration may induce resonance in the in-module crystal and lead to its malfunction or even failure. As a consequence, the module may stop working or its performance may deteriorate. Espressif Systems 28 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) 9 MAC Addresses and eFuse 9 MAC Addresses and eFuse The eFuse in ESP32-S2 series of chips has been burnt into 48-bit mac_address. The actual addresses the chip uses in station or AP modes correspond to mac_address in the following way: • Station mode: mac_address • AP mode: mac_address + 1 There are seven blocks in eFuse for users to use. Each block is 256 bits in size and has independent write/read disable controller. Six of them can be used to store encrypted key or user data, and the remaining one is only used to store user data. Espressif Systems 29 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) Related Documentation and Resources Related Documentation and Resources Related Documentation • ESP32-S2 Series Datasheet – Specifications of the ESP32-S2 hardware. • ESP32-S2 Technical Reference Manual – Detailed information on how to use the ESP32-S2 memory and peripherals. • ESP32-S2 Hardware Design Guidelines – Guidelines on how to integrate the ESP32-S2 into your hardware product. • ESP32-S2 Series SoC Errata – Descriptions of known errors in ESP32-S2 series of SoCs. • Certificates https://espressif.com/en/support/documents/certificates • ESP32-S2 Product/Process Change Notifications (PCN) https://espressif.com/en/support/documents/pcns?keys=ESP32-S2 • ESP32-S2 Advisories – Information on security, bugs, compatibility, component reliability. https://espressif.com/en/support/documents/advisories?keys=ESP32-S2 • Documentation Updates and Update Notification Subscription https://espressif.com/en/support/download/documents Developer Zone • ESP-IDF Programming Guide for ESP32-S2 – Extensive documentation for the ESP-IDF development framework. • ESP-IDF and other development frameworks on GitHub. https://github.com/espressif • ESP32 BBS Forum – Engineer-to-Engineer (E2E) Community for Espressif products where you can post questions, share knowledge, explore ideas, and help solve problems with fellow engineers. https://esp32.com/ • The ESP Journal – Best Practices, Articles, and Notes from Espressif folks. https://blog.espressif.com/ • See the tabs SDKs and Demos, Apps, Tools, AT Firmware. https://espressif.com/en/support/download/sdks-demos Products • ESP32-S2 Series SoCs – Browse through all ESP32-S2 SoCs. https://espressif.com/en/products/socs?id=ESP32-S2 • ESP32-S2 Series Modules – Browse through all ESP32-S2-based modules. https://espressif.com/en/products/modules?id=ESP32-S2 • ESP32-S2 Series DevKits – Browse through all ESP32-S2-based devkits. https://espressif.com/en/products/devkits?id=ESP32-S2 • ESP Product Selector – Find an Espressif hardware product suitable for your needs by comparing or applying filters. https://products.espressif.com/#/product-selector?language=en Contact Us • See the tabs Sales Questions, Technical Enquiries, Circuit Schematic & PCB Design Review, Get Samples (Online stores), Become Our Supplier, Comments & Suggestions. https://espressif.com/en/contact-us/sales-questions Espressif Systems 30 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) Revision History Revision History Date Version Release notes 2025-02-24 v1.5 • Marked ESP32-S2-WROOM as end of life. Note this datasheet is no longer maintained. 2024-09-05 v1.4 • According to PCN20230702, upgraded the chip ESP32-S2 from chip re- vision v0.0 to chip revision v1.0 • Marked ESP32-S2-WROOM-I as end of life • Updated performance data tables in Section 4 Electrical Characteristics • Updated peripheral schematic in Chapter 6 Peripheral Schematics 2022-03-01 v1.3 • Added module introduction and pictures on the title page • Added NRND watermark • Added a note with a link and QR code to the latest version of the document • Updated Section ”Learning Resources” and renamed to ”Related Docu- mentation and Resources” • Updated Table 12 Current Consumption in Modem-sleep Mode and Table 13 Current Consumption in Low-Power Modes 2020-12-17 v1.2 • Added TWAI to Chapter 1 Module Overview • Updated Table 11 Current Consumption Depending on RF Modes • Updated the capacitance value of RC delay circuit to 1 µF in Chapter 6 Peripheral Schematics • Updated note in Section 8.3.1 Reflow Profile 2020-07-31 v1.1 Updated notes in table 1 2020-06-01 v1.0 Official release 2020-03-10 v0.5 Preliminary release Espressif Systems 31 Submit Documentation Feedback ESP32-S2-WROOM & WROOM-I Datasheet v1.5 End of Life (EOL) Disclaimer and Copyright Notice Information in this document, including URL references, is subject to change without notice. ALL THIRD PARTY’S INFORMATION IN THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES TO ITS AUTHENTICITY AND ACCURACY. NO WARRANTY IS PROVIDED TO THIS DOCUMENT FOR ITS MERCHANTABILITY, NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, NOR DOES ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. All liability, including liability for infringement of any proprietary rights, relating to use of information in this document is disclaimed. No licenses express or implied, by estoppel or otherwise, to any intellectual property rights are granted herein. The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is a registered trademark of Bluetooth SIG. All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged. Copyright © 2026 Espressif Systems (Shanghai) Co., Ltd. All rights reserved. www.espressif.com