Overview ESP32-LyraTD-SYNA Hardware Resources Configuring for AVS Software Preparation Hardware Preparation Flashing the Firmware Driver Installation Flashing ESP32 Network Configuration Wi-Fi Networking Interactive Function Voice Recognition Buttons Appendix - Schematics ESP32-LyraTD-SYNA User Guide Version 1.1 Espressif Systems Copyright © 2019 About This Guide This document helps you to get started with the ESP32-LyraTD-SYNA development board. Release Notes Documentation Change Notification Espressif provides email notifications to keep customers updated on changes to technical documentation. Please subscribe at https://www.espressif.com/en/subscribe. Certification Download certificates for Espressif products from https://www.espressif.com/en/ certificates.! Date Version Release notes 2019.09 V1.0 Initial release. 2019.10 V1.1 Updated module figure in Chapter 1.1. Table of Contents 1. Overview 1 ................................................................................................................................ 1.1. ESP32-LyraTD-SYNA! 1"................................................................................................................. 1.2. Hardware Resources! 1".................................................................................................................. 2. Configuring for AVS 3 ............................................................................................................... 2.1. Software Preparation! 3"................................................................................................................. 2.2. Hardware Preparation! 3"................................................................................................................ 2.3. Flashing the Firmware! 4"................................................................................................................ 2.3.1. Driver Installation! 4".......................................................................................................... 2.3.2. Flashing ESP32! 4"............................................................................................................. 2.4. Network Configuration! 7"............................................................................................................... 2.4.1. Wi-Fi Networking! 7".......................................................................................................... 2.5. Interactive Function! 10".................................................................................................................. 2.5.1. Voice Recognition! 10"....................................................................................................... 2.5.2. Buttons! 10"....................................................................................................................... A. Appendix - Schematics 11....................................................................................................... ! 1.Overview 1. Overview ESP32-LyraTD-SYNA is one of Espressif’s Audio Development Board based on ESP32 MCU and Synaptics DSP. It is an Acoustic Echo Cancelation (AEC) solution, supporting voice recognition and voice wake-up. Audio files in the format of WAV, MP3, AAC, FLAC, OPUS and OGG can be decoded and encoded without quality loss. It also supports connection to Amazon’s AVS (Alexa Voice Service), Google's Dialogflow and Google's GVA (Google Voice Assistant). 1.1. ESP32-LyraTD-SYNA ESP32-LyraTD-SYNA is based on ESP32-WROVER-B, a BT/Wi-Fi combo module, and a digital signal processor (DSP) that features a two-microphone array for noise reduction and echo cancelation, as well as a Coder-Decoder (CODEC) that includes two pairs of DACs & ADCs with high sampling rates. ! Figure 1-1. ESP32-LyraTD-SYNA 1.2. Hardware Resources 1. USB Power Port Provides power supply to the whole system. It is recommended that the system be connected to a power adapter for sufficient current supply. 2. ESP32-WROVER-B module This is a powerful, general-purpose, Wi-Fi+BT+BLE dual core MCU module, targeting a wide variety of applications ranging from low-power sensor networks to the most demanding tasks, such as voice encoding/decoding, music streaming and runs voice assistant client SDK. 3. CX20921 DSP CX20921 is a dual core, far field voice input processor which supports Smart Source Pickup(SSP) noise suppression and various functionalities such as voice control, voice search, Voice over Internet Protocol (VOlP) and acoustic echo cancellation (AEC). This Espressif ! /171 2019.10 ! 1.Overview audio DSP is used for wake-word detection. It captures audio data from two external microphones. 4. CX20721 codec CX20721 is an audio Coder-Decoder which has integrated AudioSmart Class-D with 2.8W per channel. 5. CP2102N USB-UART Chip An upgraded version of the CP2102 chip supports USB-to-UART conversion. 6. USB Communication Port This is a normal USB communication port between PC and ESP32 module. 7. ON-Board microphone There are two types of microphone connection, on-board and by MIC-IN connector. 8. MIC-IN microphone connector Supports two external microphones. 9. FPC connector This connection is reserved for connecting external sub board consisting of more devices, such as microphone array, buttons and LEDs etc. 10. Earphone jack Used for plugging in earphones. Audio output is via codec. 11. Speaker output port Supports two external speakers output via codec. 12. Button The six buttons figure different functions, such as RST, BOOT, PLAY, VOL+/-, MUTE etc. ⚠ Notice: The IC design of this chip is a little different from CP2102. Espressif ! /172 2019.10 ! 2. Configuring for AVS 2. Configuring for AVS 2.1. Software Preparation 1. Installing Flash Download Tool Linux/macOS/Windows users can use the terminal to flash firmware. For more details, please check ESP-IDF Programming Guide. Windows users may also use a graphical tool to flash firmware onto the board using the Flash Download Tool. 2. Downloading Firmware Please follow the build instructions of the Alexa SDK from the Github page: https:// github.com/espressif/esp-va-sdk. 3. Debugging Tool Use serial monitor/console that suits your development environment at baud rate of 115200. 4. App for Provisioning In order to run Alexa you need to provision LyraTD-SYNA with Alexa credentials and network settings (Wi-Fi SSID and passphrase). • Android APK: https://play.google.com/store/apps/details? id=com.espressif.provbleavs • iOS: https://apps.apple.com/us/app/esp-alexa/id1464127534 2.2. Hardware Preparation • 1 x PC (Linux Operating System is recommended). • 1 x ESP32-LyraTD-SYNA. • 2 x Micro USB cables (one is for the USB power supply). • 1 x Speaker or 1 x earphone. ⚠ Notice: The GitHub repository uses Espressif’s wake-word engine (WWE) for processing the ‘Alexa’ wake- word. This allows easy evaluations. For production use cases, please reach out to sales@espressif.com or your Synaptics sales representative to obtain an Amazon certified wake-word engine. Espressif ! /173 2019.10 ! 2. Configuring for AVS 2.3. Flashing the Firmware This document captures the process of flashing the firmware on Windows. Please refer to the ESP-VA-SDK repository on Github for setup on other platforms. 2.3.1. Driver Installation Connect the board to a PC with a Micro-USB cable and install the USB-to-UART driver. 2.3.2. Flashing ESP32 ! Figure 2-1. Flash Download Tool • In order to build examples of esp-va-sdk, please follow the instructions mentioned on the GitHub page. • Once you build the Alexa firmware, you will generate three artifacts: bootloader.bin, partitions.bin and alexa.bin. • For Flash Download Tool users, follow the instructions given below. 1. Run Flash Download Tool, and click on “ESP32 Download Tool” at the interface. See Figure 2-1 above. 2. Then you will see the interface shown in Figure 2-2 below. Espressif ! /174 2019.10 ! 2. Configuring for AVS ! Figure 2-2. ESP32 Download Tool 3. Select the binary files (mentioned in table below) and set appropriate address in the tool as shown in Figure 2-3. Binary Files Address Function bootloader.bin 0x1000 basic configuration partitions.bin 0x8000 basic configuration alexa.bin 0x10000 audio application Espressif ! /175 2019.10 ! 2. Configuring for AVS ! Figure 2-3. Flashing Configuration 4. The SPI Download configuration on the ESP32 Download Tool is shown in Figure 2-3. Select “80 MHz” for “SPI SPEED”; select “DIO” for “SPI MODE”; and select “128 Mbit” for “FLASH SIZE”. 5. Select the COM port in line with the one used by the PC; select “1152000” as a baud rate. 6. Click the “START” button on the ESP32 Flash Download Tool to start downloading the firmware. 7. Wait for the download to finish. See Figure 2-4. ! Figure 2-4. Downloading Firmware Espressif ! /176 2019.10 ! 2. Configuring for AVS 2.4. Network Configuration 2.4.1. Wi-Fi Networking 1. After successfully downloading the firmware, power on the board again by pressing the EN button. 2. To configure the network for the first time: • Turn on the bluetooth in your phone. Open Espressif’s Alexa programming app and click on Provision New Device. Make sure your phone has internet connectivity. ! Figure 2-5. Provision New Device • The provisioning happens over BLE (Bluetooth Low Energy). Android mandates applications to have Location permission for accessing BLE. Please provide the permission when the pop-up shows up. • You will see the list of available devices that needs to be provisioned, namely ESP- Alexa-WXYZ. Select the device that you wish to provision. 📖 Note: Terminal users can follow the flashing instructions as available on the GitHub page. Espressif ! /177 2019.10 ! 2. Configuring for AVS ! Figure 2-6. List of available devices • Next step is to login to your amazon account. ! Figure 2-7. Login to your amazon • After successful login and authorization, you will be shown a list of Wi-Fi networks in the vicinity. Choose the network that you wish the device to connect to. Once Espressif ! /178 2019.10 ! 2. Configuring for AVS selected, enter the passphrase of that Wi-Fi network and click on the provision button. ! Figure 2-8. Available Wi-Fi networks ! Figure 2-9. Enter your passphrase • On successfully connecting to the Wi-Fi network, after provisioning, the DSP and Alexa will be initialized, and ready to take voice commands. Espressif ! /179 2019.10 ! 2. Configuring for AVS 2.5. Interactive Function 2.5.1. Voice Recognition • Once all initialization are done, the device is ready. You can either use "PLAY" button on the board (Tap-To-Talk) or say "Alexa" to start a conversation. For Tap-to-Talk, press and release the button and speak. • You can now ask any command like: - Tell me a joke. - How is the weather? - Will it rain today? - Sing a song. - Play TuneIn radio. - Set volume level to 7. 2.5.2. Buttons • The “PLAY” button can be used as tap-to-talk. The same button can also be used to disable an Alarm/Timer. • The “Vol+” and “Vol-” buttons can be used to adjust the volume of the sound. Press them repeatedly until you reach the desired sound volume. • The "Mute" button can be used to mute/unmute the device. • To reset to factory settings, press "Vol+" and "Vol-" button together for about 10 seconds. Espressif ! /1710 2019.10 ! Appendix A A. Appendix - Schematics ! ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A ESP32 Power Block: System Block: DSP CX20921 Codec CX22721 MIC*2 Keys SPK*2 EN Key RST BOOT Key BOOT USB to UART TX/RX USB CNN D+/D- Key*4 CNN(Reserved for LED,Key,MIC) I2C&ADC MIC OUT+/- INT+RST+I2C +I2S_CX_TX IRQ+EAPD+I2C +I2S_ESP_TX I2S_AEC VCC AP7361C-33 -ER-7/13 USB CNN ESP32 3.3V LDO 3.3V DSP CX20921 3.3V Codec CX22721 LDO LDO 1.8V VCC Titl e Size Document Number Rev Date: Sheet of <01_Block> 1.3 ESP32-LYRATD-SYNA C 1 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <01_Block> 1.3 ESP32-LYRATD-SYNA C 1 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <01_Block> 1.3 ESP32-LYRATD-SYNA C 1 6Friday, August 30, 2019 Espressif ! /!11 17 2019.10 ! Appendix A ! ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A ESP32 Module: Button Array USB<->UART: JTAG MTDI MTCK MTMS MTDO UART I2C I2C:SCL I2C:SDA I2S Automatic & Button Download: Auto program DTR RTS--> EN_Auto IO0_IO2_Auto 1 1 1 1 0 0 1 1 1 0 0 1 0 1 1 0 DSP GPIO DSP_I2S_LRCK : IO32 Codec_SPK_MUTE:IO22 PJ_DET:IO21 Codec_I2S_BCLK:IO5 Codec_I2S_FS:IO25 Codec_I2S_SDI0:IO26 Codec_I2S_MCLK:IO0 Codec_EAPD:IO4 DSP_I2S_DO : IO35 DSP_I2S_BCLK : IO33 DSP RESET : IO19 I2C_SCL:IO23 I2C_SDA:IO18 MUTE_ON_OFF:IO27 USB: 3.3V/800mA Power Supply for ESP32: EN SENSOR_VP SENSOR_VN_ADC IO34 IO35 IO32 IO33 IO25 IO26 IO27 IO14 3V3 IO13 DGND IO22 TXD0 RXD0 IO21 IO19 IO18 IO4 IO0 IO5 IO23 Module_NC IO15 IO2 DGND SHD/SD2 SWP/SD3 SCS/CMD SCK/CLK SDO/SD0 SDI/SD1 IO17_NC IO16_NC DGND IO12 IO12 IO13 IO14 IO15 TXD0 RXD0 IO23 IO18 IO35 IO32 IO33 IO0 IO5 IO25 IO26 IO23 IO18 Module_NC 3V3 IO26 IO27 IO34 IO22 DGND IO12 IO17_NC IO16_NC DGND IO19 IO25 IO2 EN SENSOR_VP SENSOR_VN_ADC IO35 IO32 IO33 IO14 IO23 TXD0 RXD0 IO21 IO18 IO4 IO0 DGND IO13 SHD/SD2 SWP/SD3 SCS/CMD SCK/CLK SDO/SD0 SDI/SD1 IO15 IO5 SENSOR_VN IO18 IO33 IO32 SENSOR_VP IO22 IO21 IO5 IO25 IO26 IO0 IO4 IO35 IO19 IO23 IO27 D- D+ USB_DP USB_DN REGIN TXD RXD0 USB_DN RST# ACTIVE TXD0 USB_DP DTR RTS IO0_IO2_Auto IO0_IO2_KEY IO2 IO0 EN EN_KEY EN_Auto DTR RTS EN_Auto IO0_IO2_Auto EN SENSOR_VN SENSOR_VN_ADC DGND GND DGND VDD33 DGND VDD33 VDD33 DGND GNDGND GND GND VUSB GND VBUS0 VUSB GND GND GND VBUS0 GND GND VDD33 GND VDD33 VCC GNDGND VUSB GND VCC GNDGND GND VDD33 VDD33 GND GND VDD33 DGND VDD33 DGND SENSOR_VN 3 IO18 3,5,6 IO33 5 IO32 5 CX_GPIO_1 5 IO23 3,5,6 IO22 6 IO21 6 IO5 6 IO25 6 IO26 6 IO0 6 IO4 6 IO35 5 IO19 5 IO27 3,5 Titl e Size Document Number Rev Date: Sheet of <02_Power_MCU> 1.3 ESP32-LYRATD-SYNA C 2 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <02_Power_MCU> 1.3 ESP32-LYRATD-SYNA C 2 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <02_Power_MCU> 1.3 ESP32-LYRATD-SYNA C 2 6Friday, August 30, 2019 R36 100K(1%)(NC) R230 0R(5%) R21 0R(5%) U4 AP7361C-33-ER-7/13 GND 1 VOUT 2 VIN 3 Tab 4 C16 0.1uF/16V(10%) TP59 1 J12 USB_CON8 VBUS 1 D- 2 D+ 3 GND 5 NC 4 GND 6 GND 7 GND 8 GND 9 TP53 1 C4 10uF/16V(20%) D37 BAT54C 1 2 3 TP49 1 D3 LESD5D5.0CT1G C193 0.1uF/16V(10%) D4 LESD5D5.0CT1G SW2 SW_R 1 1 2 2 3 3 4 4 TP58 1 TP50 1 SW1 SW_R 1 1 2 2 3 3 4 4 R9 0R(5%) R229 47.5K(5%) TP64 1 D35 BAT54A 1 2 3 R286 5.76K(1%) R2 2.2K(1%) R38 0R(5%) J2 SK-12D02-VG3 1 2 3 J1 USB_CON8 VBUS 1 D- 2 D+ 3 GND 5 NC 4 GND 6 GND 7 GND 8 GND 9 R31 0R(5%) TP60 1 TP54 1 C10 10uF/16V(20%) C205 0.1uF/16V(10%) TP52 1 R22 0R(5%) C11 0.1uF/16V(10%) TP57 1 C14 0.1uF/16V(10%) D36 BAT54C 1 2 3 R3 2.2K(1%) R29 1K(1%) D17 GREEN LED 12 TP62 1 C18 0.1uF/16V(10%)(NC) R1 0R(5%) R24 0R(5%) C5 22uF/10V(20%) C19 0.1uF/16V(10%)(NC) TP65 1 C3 1uF/16V(10%) R5 10K(5%) Q8 L8050QLT1G R228 22.1K(5%) D31 SS24(NC) TP61 1 TP55 1 U5 CP2102N-A02-GQFN28 DCD 1 RI 2 GND 3 D+ 4 D- 5 VDD 6 REGIN 7 VBUS 8 RST 9 NC1 10 SUSPEND 11 SUSPEND 12 NC2 13 NC3 14 NC4 15 NC5 16 NC6 17 NC7 18 NC8 19 NC9 20 NC10 21 NC11 22 CTS 23 RTS 24 RXD 25 TXD 26 DSR 27 DTR 28 PGND 29 C2 1uF/16V(10%) TP48 1 R33 100K(1%)(NC) D2 LESD5D5.0CT1G R28 10K(5%)(NC) R287 10K(5%) TP56 1 R288 10K(5%) D1 SS24 TP51 1 R35 0R(5%) Q9 L8050QLT1G TP63 1 C1 100uF/6.3V(20%) C15 10uF/16V(20%) C12 22uF/10V(20%) U2 ESP32-WROVER-B GND1 1 3V3 2 EN 3 SENSOR_VP 4 SENSOR_VN 5 IO34 6 IO35 7 IO32 8 IO33 9 IO25 10 IO26 11 IO27 12 IO14 13 IO12 14 GND2 15 IO13 16 SD2 17 SD3 18 CMD 19 CLK 20 SD0 21 SD1 22 IO15 23 IO2 24 IO0 25 IO4 26 NC1 27 NC2 28 IO5 29 IO18 30 IO19 31 NC 32 IO21 33 RXD0 34 TXD0 35 IO22 36 IO23 37 GND3 38 P_GND 39 C13 10uF/16V(20%) U1 ESP32-WROOM-32D(NC) GND1 1 3V3 2 EN 3 SENSOR_VP 4 SENSOR_VN 5 IO34 6 IO35 7 IO32 8 IO33 9 IO25 10 IO26 11 IO27 12 IO14 13 IO12 14 GND3 38 IO23 37 IO22 36 TXD0 35 RXD0 34 IO21 33 NC 32 IO19 31 IO18 30 IO5 29 IO17 28 IO16 27 IO4 26 IO0 25 GND2 15 IO13 16 SD2 17 SD3 18 CMD 19 CLK 20 SD0 21 SD1 22 IO15 23 IO2 24 P_GND 39 Espressif ! /!12 17 2019.10 ! Appendix A ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A 6-Physical-Buttons: Connector for LED & Button & MIC (Reserved): 0.6V MIC MUTE 1.8V 2.42V 1.2V VOL+ PLAY/PAUSE VOL- I2C_SCL:IO23 I2C_SDA:IO18 Button Array MUTE_ON_OFF:IO27 IO18 IO23 SENSOR_VN CX_MICBIAS1 CX_MICBIAS2 ExtFFC_MIC_INN1 ExtFFC_MIC_INP1 ExtFFC_MIC_INP2 ExtFFC_MIC_INN2 IO27 SENSOR_VN SENSOR_VN IO23 IO18 CX_MICBIAS1 CX_MICBIAS2 ExtFFC_MIC_INP1 ExtFFC_MIC_INN1 ExtFFC_MIC_INP2 ExtFFC_MIC_INN2 IO27 CX_GND LED_VCC CX_GND VCC CX_GND CX_GND CX_GND GND VDD33 GND GND GND GND SENSOR_VN 2 IO23 2,5,6 IO18 2,5,6 CX_MICBIAS1 5 CX_MICBIAS2 5 ExtFFC_MIC_INP1 5 ExtFFC_MIC_INN1 5 ExtFFC_MIC_INP2 5 ExtFFC_MIC_INN2 5 IO27 2,5 Titl e Size Document Number Rev Date: Sheet of <03_Button& Connector> 1.3 ESP32-LYRATD-SYNA C 3 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <03_Button& Connector> 1.3 ESP32-LYRATD-SYNA C 3 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <03_Button& Connector> 1.3 ESP32-LYRATD-SYNA C 3 6Friday, August 30, 2019 R40 2.2K(1%) C137 0.1uF/16V(10%) S3 SW_R 1 1 2 2 3 3 4 4 S4 SW_R 1 1 2 2 3 3 4 4 D19 LESD5D5.0CT1G J13 AFC01-S16FCA-00 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 S1 SW_R 1 1 2 2 3 3 4 4 S2 SW_R 1 1 2 2 3 3 4 4 R39 5.76K(1%) R37 12K(1%) C17 10nF/50V(10%) R30 10K(5%) R276 0R(5%) R32 27.4K(1%) C138 10uF/16V(20%) Espressif ! /!13 17 2019.10 ! Appendix A ! ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A Note: Include +1.0V Test Point as shown in all designs. Place L16, C149, C150 close to CX20921 device. Critical Layout Note: C146 negative terminal and C150 negative terminal connecting to PGND should both be placed very close to pin 6 of the CX20921 device. The PGND-GND 50-mil tie connection should be close to the C146/C150/Pin_6 junction. Doing this will minimize the GND bounce in the DC-DC converter area. VISHAY:IFSC1515AHER2R2M01. Note: Include resistor ladder and capacitor as shown in all designs. Single ended:45ohm Differential:90ohm +5V_USB USB_DP USB_DM GND TXC: 7A-24.000MAAJ-T Note: VDDO_1 and VDDO_2 should connect directly to +3.3V or +1.8V external System power, based on I/O signal level requirements. VDDO_1 - Input supply which internally powers I2S TX, I2C Slave, SPI Master, and RESET interfaces. VDDO_2 - Input supply which internally powers I2S RX, GPIOs, UART and DMIC interfaces. VDDO_3 - Input supply which internally powers the USB interface, must always connect to +3.3V only. Create PGND plane, separate from normal GND (Digital Ground) plane for internal DCDC. Tie the PGND to Digital Ground planes together at C146/C150/Pin_6 junction using 50-mil trace. DCDC/DIGITAL/MIC GROUNDS Mic section has its own plane MGND. Tie MGND to GND with 50-mils metal plane on Bottom layer. Short PGND to DGND directly with a trace. Short MGND to DGND directly with a trace Do not use a resistor or ferrite between the grounds. Power for CX20921 ： From CX20921 datasheet P18. Power consumption max is 3.3x49mA=161.7mW. 3.3V/400mA CX_USB_DP CX_USB_DM CX_USB_5VDET CX20921_3V3 CX_PGND CX_GND CX20921_3V3 CX_PGND CX20921_3V3 CX_GND CX20921_1V0 CX_PGND CX_GND CX_GND CX_GND CX_GND CX_GND CX20921_1V0CX20921_3V3 CX_GND CX20921_3V3 CX20921_3V3 CX_GND CX20921_3V3 CX_GND CX20921_1V0 CX_GNDCX_GND CX_MGND CX_MGND CX_GND CX_GND CX20921_3V3 CX_GND CX_MGNDCX_PGND CX_GND CX_GND VCC CX_GND CX_GND CX20921_3V3 CX_GND CX_GNDDGND VDD33 Titl e Size Document Number Rev Date: Sheet of <04_CX20921_Power> 1.3 ESP32-LYRATD-SYNA C 4 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <04_CX20921_Power> 1.3 ESP32-LYRATD-SYNA C 4 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <04_CX20921_Power> 1.3 ESP32-LYRATD-SYNA C 4 6Friday, August 30, 2019 R77 10K(5%) C164 10nF/50V(10%) R234 0R(5%) R180 22.1R(5%) C161 10nF/50V(10%) C145 0.1uF/16V(10%) C165 10uF/16V(20%) TP21 1 C168 0.1uF/16V(10%) C154 10nF/50V(10%) R80 10K(5%)(NC) C146 10uF/16V(20%) C162 1uF/25V(10%) C166 0.1uF/16V(10%) R181 22.1R(5%) POWER U19E CX20921_60P_ENG VDD33_ANA 38 VDD_LDO33ANAOUT 43 VDD_LDO33IN 44 VDD_LDO12OUT 45 EP 61 VDDO_1 4 VDDO_2 21 VDDO_3 28 VDD 5 VDD 9 VDD 20 VDD 27 VDD 50 VDD 56 VDDO_1 55 TP22 1 C155 1uF/25V(10%) C178 10nF/50V(10%) R176 100K(1%) C169 0.1uF/16V(10%) R177 301K(1%) TP23 1 C179 1uF/25V(10%) C180 10nF/50V(10%) C66 4.7uF/10V(20%) C151 1uF/16V(10%) C158 10nF/50V(10%) C170 0.1uF/16V(10%) TP24 1 C156 0.1uF/16V(10%) C181 1uF/25V(10%) C153 22pF/50V(5%) C159 1uF/25V(10%) C147 10nF/50V(10%) C172 1uF/25V(10%) C157 10uF/16V(20%) C171 0.1uF/16V(10%) R263 52.3K(1%) C148 1uF/25V(10%) C152 22pF/50V(5%) C173 10nF/50V(10%) C160 10nF/50V(10%) R214 0R(5%) R182 33R(5%) R264 30.1K(1%) TP20 1 XTAL DCDC USB U19D CX20921_60P_ENG DCDC_PVSS 6 USB_DP 29 AVDD33 13 PSUP_1V0 46 PSUP_3V3 49 XIN 47 XOUT 48 USB_DM 30 DCDC_EN 11 DCDC_FB 12 DCDC_IREF 10 DCDC_SW 7 PVDD33 8 USB_5VDET 31 C174 10nF/50V(10%) C149 0.1uF/16V(10%) Y3 24MHz C68 0.1uF/16V(10%) L16 2.2uH(20%)@3A R178 80.6K(5%) C175 1uF/25V(10%) C150 10uF/16V(20%) C69 10uF/16V(20%) C67 10nF/50V(10%)(NC) R179 130K(5%) R275 0R(5%)(NC) C163 1uF/25V(10%) C167 0.1uF/16V(10%) U11 RT9043GB@400mA EN 3 OUT 5 VIN 1 NR/FB 4 GND 2 R183 2.2R(1%) Espressif ! /!14 17 2019.10 ! Appendix A ! ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A Digital MEMS Option CX20921 I2S Block: CX20921 Communication Block: Note: For ASR designs, the GPIO to host processor connection is required. For VoIP designs, the GPIO to host connection is optional. DSP RESET : IO19 Codec_I2S_MCLK DSP_I2C_SDA : IO18 DSP_I2C_SCL : IO23 DSP GPIO DSP_I2S_BCLK : IO33 DSP_I2S_DO : IO35 DSP_I2S_LRCK : IO32 MUTE_ON_OFF:IO27 To MCU; From MCU; MIC MUTE LED CX20921 Mic Block: Analog Mic Input: Note: If the mic from FFC connector is analog MEMS, R277,R278,R279,R280, should be surface-mounted, And R53,R52,R67,R69, should be NC. MIC INPUT Option1 Option2 AEC_I2S_FS: AEC_I2S_DATA: AEC_I2S_BCLK: CX_TXD CX_RTS/DMIC_CLK CX_CTS/DMIC_DAT CX_RXD CX_I2C_SDA CX_GPIO_1 CX_RSTN CX_RSTN CX_I2C_SCL CX_I2S_TX_DATA CX_I2C_SCL CX_TXD CX_I2S_TX_CLK CX_I2S_TX_LRCK CX_GPIO_1 IO27 IO27 CX_INPUT_INP1 CX_INPUT_INN1 IO27 CX_ANA_INP1 CX_ANA_INN1 CX_MICBIAS1 CX_INPUT_INP2 CX_INPUT_INN2 IO27 CX_ANA_INP2 CX_ANA_INN2 CX_MICBIAS2 CX_I2S_RX_CLK CX_I2S_RX_LRCK CX_I2S_RX_DATA2 CX_I2S_RX_DATA3 CX_I2S_TX_LRCK CX_I2S_TX_CLK CX_I2S_TX_DATA CX_ANA_INP1 CX_ANA_INN1 CX_ANA_INP2 CX_ANA_INN2 CX_MICBIAS1 CX_MICBIAS2 IO27 CX_I2C_SDA CX_GPIO_1 CX_MICBIAS1 CX_MICBIAS2 ExtFFC_MIC_INP1 ExtFFC_MIC_INN1 ExtFFC_MIC_INP2 ExtFFC_MIC_INN2 ExtFFC_MIC_INP1CX_INPUT_INP1 OnBoard_MIC_INP1 AuxIN_MIC_INP1 CX_INPUT_INN1 OnBoard_MIC_INN1 AuxIN_MIC_INN1 ExtFFC_MIC_INN1 CX_INPUT_INP2 OnBoard_MIC_INP2 AuxIN_MIC_INP2 ExtFFC_MIC_INP2 CX_INPUT_INN2 OnBoard_MIC_INN2 AuxIN_MIC_INN2 ExtFFC_MIC_INN2 OnBoard_MIC_INP2 OnBoard_MIC_INN2 OnBoard_MIC_INP1 OnBoard_MIC_INN1 AuxIN_MIC_INN1 AuxIN_MIC_INP1 AuxIN_MIC_INN2 AuxIN_MIC_INP2 CX20721_BCLK CX20721_LRCLK CX20721_ADCDAT CX20721_BCLK CX20721_LRCLK CX_I2S_RX_DATA1CX20721_ADCDAT CX_GND CX20921_3V3 CX_GND CX20921_3V3CX20921_3V3 CX20921_3V3 CX_GND CX_GND CX_GND CX20921_3V3 CX_GND CX_GND CX20921_3V3 DGND CX20921_3V3 CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX20921_3V3 CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND CX_GND CX_MGND CX_MGND CX_MGND CX_MGND CX_MGND VDD33 CX20921_3V3 CX_GND CX_GND CX_GND CX_GND CX_GND IO19 2 IO18 2,3,6 IO35 2 CX_TXD 6 IO23 2,3,6 IO33 2 IO32 2 CX_GPIO_1 2 IO27 2,3 CX_MICBIAS1 3 CX_MICBIAS2 3 ExtFFC_MIC_INP1 3 ExtFFC_MIC_INN1 3 ExtFFC_MIC_INP2 3 ExtFFC_MIC_INN2 3 CX20721_BCLK 6 CX20721_LRCLK 6 CX20721_ADCDAT 6 Titl e Size Document Number Rev Date: Sheet of <05_CX20921_Interface> 1.3 ESP32-LYRATD-SYNA C 5 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <05_CX20921_Interface> 1.3 ESP32-LYRATD-SYNA C 5 6Friday, August 30, 2019 Titl e Size Document Number Rev Date: Sheet of <05_CX20921_Interface> 1.3 ESP32-LYRATD-SYNA C 5 6Friday, August 30, 2019 I2S U19A CX20921_60P_ENG I2S_TX_CLK 3 I2S_TX_DATA_1 1 I2S_TX_LRCK 2 I2S_RX_CLK 22 I2S_RX_DATA_1 23 I2S_RX_LRCK 24 I2S_RX_DATA_2 25 I2S_RX_DATA_3 26 TP77 1 R69 1.1K(5%) R201 10K(5%) J16 CON3x1_2P54 1 2 3 D29 LESD8D3.3CAT5G(NC) TP34 1 TP26 1 R300 0R(5%) R53 1.1K(5%) J4 CON2 1 1 2 2 C185 10nF/50V(10%) D30 LESD8D3.3CAT5G(NC) L17 39nH(±2%) J17 CON3x1_2P54 1 2 3 L19 39nH(±2%) TP27 1 U20 W25Q32FVSSIG /CS 1 DO 2 /WP 3 GND 4 DI 5 CLK 6 /HOLD 7 VCC 8 R206 33R(5%) C186 10nF/50V(10%) D32 LESD8D3.3CAT5G(NC) R279 0R(5%)(NC) R191 10K(5%) R184 0R(5%) TP28 1 R282 10K(5%) R197 1.8K(5%)(NC) C190 10pF/50V(5%)(NC) R204 0R(5%) R194 10K(5%)(NC) R203 0R(5%) D33 LESD8D3.3CAT5G(NC) L20 39nH(±2%) R299 0R(5%) R284 0R(5%) C50 10nF/50V(10%) R207 33R(5%) C188 10uF/16V(20%)(NC) L18 39nH(±2%) R192 33R(5%) R52 1.1K(5%) R185 0R(5%) R86 0R(5%) J14 CON3x1_2P54 1 2 3 D18 RED LED R209 0R(5%) C189 10uF/16V(20%)(NC) C52 10nF/50V(10%) TP29 1 C53 10pF/50V(5%) Audio Port U19B CX20921_60P_ENG ANA_INP1 40 MICBIAS2 32 MICBIAS1 41 ANA_INN1 39 ANA_INP2 33 ANA_INN2 34 VREFN 36 VREFP 35 VREF 42 VSS_REF 37 C34 10nF/50V(10%) Q7 LBSS138LT1G TP30 1 R297 5.76K(1%) R278 0R(5%)(NC) C51 470pF/50V(10%) R198 1.8K(5%)(NC) R186 0R(5%) C36 10nF/50V(10%) R205 0R(5%) TP31 1 C32 10pF/50V(5%) R277 0R(5%)(NC) R208 0R(5%) Q11 LBSS138LT1G R212 49.9R(1%) R199 0R(5%) C54 33pF/50V(±2pF) C184 1uF/25V(10%) TP32 1 R193 10K(5%)(NC) R195 0R(5%) C191 470pF/50V(10%) C33 33pF/50V(±2pF) R187 0R(5%) U23 TS3A4742 DCN IN1 1 IN2 6 COM1 7 COM2 4 VCC 2 GND 5 NC2 3 NC1 8 R296 10K(5%) R213 49.9R(1%) J15 CON3x1_2P54 1 2 3 R200 0R(5%) R202 100K(1%) J5 CON2 1 1 2 2 C182 0.1uF/16V(10%) TP25 1 R298 0R(5%) U22 TS3A4742 DCN IN1 1 IN2 6 COM1 7 COM2 4 VCC 2 GND 5 NC2 3 NC1 8 TP38 1 R196 0R(5%) R188 4.7K(5%) TP76 1 C48 10pF/50V(5%) J18 A1251WR-S-4P 1 1 2 2 3 3 4 4 C207 0.1uF/16V(10%) R190 4.7K(5%) R210 49.9R(1%) C183 1uF/16V(10%) I2C Slave SPI Master GPIO UART U19C CX20921_60P_ENG SPI_MO 51 SPI_MI 53 S_SDA 58 SPI_CK 52 S_SCL 59 SPI_SS0 54 TEST 57 TXD 14 RXD 15 CTS 16 RTS 17 GPIO_1 18 GPIO_2 19 RSTN 60 C187 1uF/25V(10%) TP33 1 C37 10pF/50V(5%) C49 33pF/50V(±2pF) R189 4.7K(5%) TP39 1 C206 0.1uF/16V(10%) R306 5.76K(1%) C38 33pF/50V(±2pF) R67 1.1K(5%) R211 49.9R(1%) R280 0R(5%)(NC) D34 GREEN LED 12 Espressif ! /!15 17 2019.10 ! Appendix A ! 5 5 4 4 3 3 2 2 1 1 D D C C B B A A SPK: Phone Jack: Codec_EAPD:IO4 Codec_I2C_SDA:IO18 Codec_I2C_SCL:IO23 PJ_DET:IO21 Codec_SPK_MUTE:IO22 Codec_I2S_BCLK:IO5 Codec_I2S_FS:IO25 Codec_I2S_SDI0:IO26 Codec_I2S_MCLK:IO0 AEC_I2S_BCLK: 1.When PJ is not plugged in, PJ_JSENSE is pulled low, thus music output via speaker. 2.When PJ is plugged in, PJ_JSENSE is pulled high, thus music output via PJ. Codec_I2S_MCLK Codec: AEC_I2S_FS: AEC_I2S_DATA: Power Supply for Codec: 3.3V/400mA 1.8V/150mA ROUTP ROUTN LOUTN LOUTP HP_A_R HP_A_L IO18 IO4 IO23 IO21 IO22 IO0 IO5 IO25 IO26 PJ_DET CX_TXD IO22 CX20721_SPKR_MUTE CX20721_Jack_Sense_IRQ CX_TXD HP_A_L HP_A_R HGNDA HGNDB PORTD_A_MIC PORTD_B_MIC MIC/LINEIN_B_L MIC/LINEIN_B_R MICBIAS_B CX20721_BCLK CX20721_LRCLK CX20721_ADCDAT CX20721_DACDAT IO0 IO5 IO25 IO26 CX20721_MCLK IO23 IO18 CX20721_SCL CX20721_SDA DMIC1_CLK DMIC1_DAT ROUTN ROUTP LOUTP LOUTN CX20721_BCLK CX20721_LRCLK CX20721_ADCDAT IO4 CX20721_EAPD IO21 Codec_GND Codec_GND Codec_AGND Codec_AGND Codec_AGND Codec_AGND Codec_AGND Codec_GND Codec_GND Codec_GND Codec_GND CX20721_3V3 VDD18 Codec_GND Codec_GND GND Codec_GND Codec_GND Codec_AGND Codec_GND Codec_AGND Codec_AGND Codec_GND Codec_GND Codec_AGND Codec_GND AVDD5 Codec_AGND Codec_AGND CP_VDD18 Codec_GND Codec_GND VDD18 Codec_GND Codec_GND Codec_GND PVDD5_L/R Codec_GNDCodec_GNDCodec_GNDCodec_GND Codec_GND Codec_GND CX20721_3V3 CX20721_3V3 Codec_GND CX20721_3V3 Codec_GND CX20721_3V3 Codec_AGND Codec_GND Codec_GND Codec_GND Codec_GND Codec_GND Codec_VCC Codec_VCC CX20721_1V8 CX20721_1V8 Codec_GND Codec_VCC Codec_GND Codec_GND CX20721_3V3 Codec_GND Codec_GND Codec_VCC Codec_GND CX20721_1V8 Codec_GND Codec_GND Codec_GND VCC Codec_VCC IO18 2,3,5 IO4 2 IO23 2,3,5 IO21 2 IO22 2 IO0 2 IO5 2 IO25 2 IO26 2 CX_TXD 5 CX20721_BCLK 5 CX20721_LRCLK 5 CX20721_ADCDAT 5 Titl e Size Document Number Rev Date: Sheet of <06_Codec> 1.3 ESP32-LYRATD-SYNA C 6 6Thursday, September 05, 2019 Titl e Size Document Number Rev Date: Sheet of <06_Codec> 1.3 ESP32-LYRATD-SYNA C 6 6Thursday, September 05, 2019 Titl e Size Document Number Rev Date: Sheet of <06_Codec> 1.3 ESP32-LYRATD-SYNA C 6 6Thursday, September 05, 2019 U13 RT9043GB@400mA EN 3 OUT 5 VIN 1 NR/FB 4 GND 2 C102 2.2uF/10V(10%) R104 0R(5%) PJ-3930-A J7 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 C98 1000pF/50V(5%)(NC) C125 390pF/50V(10%)(NC) R272 10K(5%) C99 1000pF/50V(5%)(NC) R239 0R(5%) C120 0.1uF/16V(10%) C119 10uF/16V(20%) C124 330pF/50V(10%)(NC) C101 1uF/16V(10%) R90 10K(5%) R91 0R(5%) R283 0R(5%)(NC) D27 LESD8D3.3CAT5G(NC) R237 0R(5%) TP42 1 R259 52.3K(1%) C96 1000pF/50V(5%)(NC) TP6 1 C97 1000pF/50V(5%)(NC) R87 0R(5%) R244 5.1R(5%) R95 4.7K(5%)(NC) R98 4.7K(5%)(NC) R101 47R(1%) C90 0.1uF/16V(10%) R115 0R(5%) C121 0.1uF/16V(10%) TP45 1 C200 4.7uF/10V(20%) R108 0R(5%) R242 0R(5%) C128 330pF/50V(10%)(NC) R312 0R(5%) R106 0R(5%)(NC) R243 5.1R(5%) C198 0.1uF/16V(10%) R309 10K(5%)(NC) R261 10K(5%) R241 0R(5%) C108 4.7uF/10V(20%) C112 0.1uF/16V(10%) R92 0R(5%) C122 330pF/50V(10%)(NC) C80 22pF/50V(NC) C115 0.1uF/16V(10%) R258 0R(5%) C88 4.7uF/10V(20%) R111 100K(1%) R102 47R(1%) L22 0R(5%) R311 0R(5%) C110 4.7uF/10V(20%) C126 390pF/50V(10%)(NC) R262 10K(5%)(NC) C86 22pF/50V(NC) C100 2.2uF/10V(10%) C109 0.1uF/16V(10%) C199 10uF/16V(20%) R231 0R(5%) TP43 1 R84 33R(5%) C123 330pF/50V(10%)(NC) R238 0R(5%) L21 0R(5%) TP41 1 R93 33R(5%) R232 0R(5%) R310 10K(5%) C196 10nF/50V(10%)(NC) C117 100uF/6.3V(20%)(NC) R240 0R(5%) R114 10K(5%)(NC) TP46 1 R85 33R(5%) C79 0.1uF/16V(10%) C103 2.2uF/10V(10%) R260 30.1K(1%) J9 A2001WR-S-2P R290 0R(5%) R113 10K(5%) U21 TPS71718DCKR EN 3 OUT 5 VIN 1 NR/FB 4 GND 2 R117 0R(5%) C81 220pF/50V(5%) C116 0.1uF/16V(10%) C85 220pF/50V(5%) R110 10K(5%)(NC) R89 47R(1%) C106 0.1uF/16V(10%) J8 A2001WR-S-2P R118 0R(5%) C87 220pF/50V(5%) U12 CX20721-11Z/CX22721-11Z DACDAT 1 MCLK 2 VDDIO 3 SCL 4 SDA 5 MUSIC_REQ/SPDIF/GPIO0 6 SPKR_MUTE#/SPDIF/GPIO1 7 PORTC_DMIC_DATA1/GPIO3 8 DVDD_IO 9 PORTC_DMIC_CLK1/GPIO2 10 EAPD 11 PORTG_LEFT_P 12 PVDD5_LEFT 13 PORTG_LEFT_N 14 PORTG_RIGHT_N 15 PVDD5_RIGHT 16 PORTG_RIGHT_P 17 CP_VDD18 18 CP_FLY_P 19 CP_FLY_N 20 CP_VNEG 21 CP_VPOS 22 PORTA_L 23 PORTA_R 24 HGNDA 25 HGNDB 26 VREF_DAC 27 VREFP 28 AVDD5 29 PORTD_A 30 PORTD_B 31 MICBIASB 32 PORTB_L 33 PORTB_R 34 JSENSE 35 PCBEEP 36 LDO_AVDD 37 VDD18 38 LDO_VDD_CORE 39 BCLK 40 LRCLK 41 ADCDAT 42 EXP_GND 43 R100 47R(1%) C107 4.7uF/10V(20%) C118 10uF/16V(20%) R119 0R(5%) C197 10nF/50V(10%) TP5 1 R112 0R(5%) C105 0.47uF/16V(10%) D28 LESD8D3.3CAT5G(NC) C114 10uF/16V(20%) C82 220pF/50V(5%) TP44 1 R105 33R(5%)(NC) C104 1uF/16V(10%) TP47 1 Espressif ! /!16 17 2019.10 Disclaimer and Copyright Notice Information in this document, including URL references, is subject to change without notice. THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR 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 © 2019 Espressif Inc. All rights reserved. Espressif IoT Team" www.espressif.com 