文件编号Document No.ESP-00-2-007-03文件名称Document Name产品/工艺变更通知Product/Process Change Notice(PCN)文件版本Document Version1.1保存期限Retention Period3 年3 yearswww.espressif.com Page1/3ESP32 系列产品技术文档变更ESP32 Series Products Technical Document ChangePCN 编号PCN No.PCN-02-20190815提出日期Issue Date of PCN2019/8/15产品名称Product NameESP32 Series Products(See below for details)变更日期Proposed Date of Change2019/11/1封装类型/尺寸Package Type/SizeNA首次出货日期Proposed Date of First ShipmentNA客户批准/Customer Consent：需要批准/Approval Required通知，无需批准/Notification, Approval Not Required变更等级/Classification of Change:主要变更/Major轻微变更/Minor变更原因/Reason for Change:1. 根据 ESP32 芯片规格书的数据，VDD_SDIO 和 VDD3P3_RTC 之间存在约 6 Ω 的电阻，会根据 flash /PSRAM 不同的工作电流产生不同的压降，进而可能产生 flash / PSRAM 供电不足的问题。基于该原因，修改产品供电电压范围，以便避免以上问题发生。According to the data of ESP32 chip datasheet, there is about 6 Ω resistance between VDD_SDIO andVDD3P3_RTC, which will produce different voltage drop according to different working current of flash /PSRAM, which may lead to the problem of insufficient power supply of flash / PSRAM. For this reason,modify the voltage range of the product in order to avoid the above problems.2. 产品本身并未发生变化，仅变更相应技术文档中描述。No changes have been made to the ESP32 series of products themselves. Only the correspondingdescription in technical documents are modified.影响产品/Affected ProductsChipESP32-PICO-D4ModuleESP32-WROOM-32, ESP32-WROOM-32D/U, ESP32-WROOM-32DC/UC, ESP32-SOLO-1,ESP32-SOLO-1C, ESP32-WROVER-B/IB变更内容/Proposed Change:将上述产品技术文档中的产品供电电压范围从 2.7 V ~ 3.6 V 改为 3.0 V ~ 3.6 V，包括技术规格书和硬件设计指南。Change the supply voltage range of the above mentioned products from 2.7 V ~ 3.6 V to 3.0 V ~ 3.6 V, includingdatasheet and hardware design guidelines. www.espressif.com Page2/3变更影响/Impact of Change:1. 若客户使用 3.3 V flash / PSRAM 且使用 ESP32 芯片的 VDD_SDIO 对 flash / PSRAM 供电，则当ESP32 芯片的供电电压低于 3.0 V 时，有可能出现 flash / PSRAM 供电电压不足的问题，因此对使用低电压供电的产品，需根据实际使用的 flash / PSRAM 进行计算，以便确认是否会产生 flash / PSRAM 供电不足的问题。If the customer uses 3.3 V flash / PSRAM and the VDD_SDIO of ESP32 chip supplies power to flash /PSRAM, when the power supply voltage of ESP32 chip is less than 3.0 V, the problem of insufficient powersupply voltage of flash / PSRAM may occur. Therefore, for the products using low voltage power supply, itis necessary to calculate according to the actual use of flash / PSRAM in order to confirm whether theproblem of insufficient power supply of flash / PSRAM will occur.2. 建议客户采用修改后的供电电压范围 3.0 V ~ 3.6 V 进行产品设计或调整。Customers are advised to use the modified supply voltage range of 3.0 V ~ 3.6 V for product design oradjustment.变更识别方式/ Change Identification Method:产品本身未发生变更，无需区别。No changes have been made to the ESP32 series of products themselves. Therefore, no need fordistinguishing the products.变更前后产品处理/:How to Deal with Products:产品本身未发生变更，无需进行区分处理。建议客户使用 2019 年 11 月 1 日后官网发布的最新版技术文档。No changes have been made to the ESP32 series of products themselves. Therefore, no need fordistinguishing the products. It’s advised to use the latest version of documents released on our official websiteafter November 1, 2019.相关报告/Report(s) Attached:Related ECN No.:ECN-02-20190719邮件订阅Espressif Email Notifications乐鑫为注册用户提供电子邮件通知服务，用户可通过乐鑫订阅系统接收技术文档更新、新闻通讯、PCN 等邮件通知。Espressif sends email notifications of technical documentation changes, along with newsletters, PCNs andother valuable information, to subscribed customers only. If you wish to stay updated on our products andservices, please subscribe here.客户响应要求Customer Response Requirements客户须按照如下要求给予 Espressif PCN 反馈：Customers are required to respond to Espressif, according to the following guidelines, and confirm receipt of thePCN: www.espressif.com Page3/3主要变更/For Major Changes：a) 客户须在乐鑫发出 PCN 后的 30 天内告知已收到 PCN。Customers should confirm receipt of the PCN within 30 calendar days from the date Espressif sends it tothem.b) 如客户未在接收到 PCN 后的 30 天内告知已收到，则视为客户接受变更。If customers do not confirm receipt of the PCN within 30 calendar days, they will be regarded as havingaccepted the proposed changes.c) 客户告知确认收到 PCN 后，如未在 90 天内反馈其他要求，则视为客户接受变更。After the customers confirm receipt of the PCN, the lack of any additional responses on their part within 90calendar days constitutes acceptance of the proposed changes.轻微变更/For Minor Changes：a) 如客户未在接收到 PCN 后的 7 天内告知已收到，则视为客户接受变更。If customers do not confirm receipt of the PCN within 7 calendar days, they will be regarded as havingaccepted the proposed changes.请反馈至 pcn@espressif.com。Please send feedback to pcn@espressif.com.客户批准/确认信息Customer Approval/Acknowledgement and Remarks客户公司全称：Customer’s Company Name:PCN 评审结果/PCN Review Result：批准/Approval不批准/Disapproval需要分析/Further Analysis Required客户意见/Comment:公司代表人姓名Representative’s Name:公司代表人职责Representative’s Job Title:公司代表人签名Representative’s Signature:日期Date: