文件编号Document No.ESP-07-2-007-03文件名称Document Name产品/工艺变更通知Product/Process Change Notice(PCN)文件版本Document Version1.4保存期限Retention Period5 年5 yearswww.espressif.com Page 1 / 6ESP32-C2（ESP8684） 系列产品由芯片版本：v1.0 升级为芯片版本：v1.1Upgrade ESP32-C2 (ESP8684) Series from Chip Revision v1.0 to Chip Revision v1.1PCN 编号PCN No.PCN20230701提出日期Issue Date of PCN2023/08/24变更日期Proposed Date of Change2023/10/24预计变更后产品首次出货日期Proposed Date of FirstShipment After Change2023/11/24PCN类型/ PCN Category客户需要批准/ Customer Approval Required客户通知/ Customer Notification1. 影响产品名称/ Affected Product Name1) 芯片产品/ Chip Products：ESP8684H2，ESP8684H42) 模组产品/ Module Products：（Note: 以下模组都搭载 26 MHz 晶振/ Those modules as below are made with 26 MHz crystal）Product NameChip on boardMPNESP8684-MIN-1ESP8684H2ESP8684-MIN-1-H2ESP8684H4ESP8684-MIN-1-H4ESP8684-MIN-1UESP8684H2ESP8684-MIN-1U-H2ESP8684H4ESP8684-MIN-1U-H4ESP8684-WROOM-01CESP8684H2ESP8684-WROOM-01C-H2ESP8684H4ESP8684-WROOM-01C-H4ESP8684-WROOM-02CESP8684H2ESP8684-WROOM-02C-N2ESP8684H4ESP8684-WROOM-02C-N4ESP8684H4ESP8684-WROOM-02C-H4ESP8684-WROOM-02UCESP8684H2ESP8684-WROOM-02UC-N2ESP8684H4ESP8684-WROOM-02UC-N4ESP8684H2ESP8684-WROOM-02UC-H2ESP8684H4ESP8684-WROOM-02UC-H4ESP8684-WROOM-03ESP8684H2ESP8684-WROOM-03-H2 www.espressif.com Page 2 / 6ESP8684H4ESP8684-WROOM-03-H4ESP8684-WROOM-04CESP8684H2ESP8684-WROOM-04C-H2ESP8684H4ESP8684-WROOM-04C-H4ESP8684-WROOM-05ESP8684H2ESP8684-WROOM-05-H2ESP8684H4ESP8684-WROOM-05-H4ESP8684-WROOM-06CESP8684H2ESP8684-WROOM-06C-H2ESP8684H4ESP8684-WROOM-06C-H4ESP8684-WROOM-07ESP8684H2ESP8684-WROOM-07-H2ESP8684H4ESP8684-WROOM-07-H43) 开发板产品 / Developement Board Products：(Note: 以下开发板都搭载 26 MHz 晶振/ The modules inside are made with 26 MHz crystal)Product NameMPNESP8684-DevKitM-1ESP8684-DevKitM-1-H4ESP8684-DevKitM-1U-H42.变更原因/ Reason for ChangeESP32-C2 （ESP8684）系列芯片版本 v1.0 及之前版本的芯片，仅支持搭配 26 MHz 晶振使用。为使其支持 26 MHz 和 40 MHz 晶振，乐鑫升级 ESP32-C2（ESP8684）系列至 v1.1 版本芯片。段落 1 列出的模组和开发板中使用的主芯片为 ESP32-C2（ESP8684）系列芯片，因此段落 1 列出的模组和开发板产品也会使用升级后的芯片版本。The revision v1.0 and earlier versions of ESP32-C2 (ESP8684) series of chips only support 26 MHz crystal.To enable support for both 26 MHz and 40 MHz crystal, Espressif upgraded ESP32-C2 (ESP8684) series tochip revision v1.1. The upgraded chip revision will be installed in modules and development boards fromESP32-C2 (ESP8684) series listed in Para 1.3.变更描述/ Description of Change将 ESP32-C2（ESP8684）系列的芯片版本 v1.0 升级为 v1.1。v1.0 及之前版本的芯片仅支持 26 MHz 晶振，升级后 v1.1 的芯片可支持 26 MHz 和 40 MHz 晶振，变更详情见 ESP8684 系列芯片勘误表。段落 1 列出的模组和开发板产品中使用的主芯片为 ESP32-C2（ESP8684）系列芯片，因此段落 1 列出的模组和开发板产品搭载的芯片进行相应的更新，但模组上的晶振无变化，仍是 26MHz 晶振。ESP32-C2 (ESP8684) series of chips has been upgraded from chip revision v1.0 to chip revision v1.1. Thechip revision v1.0 and earlier versions only support 26 MHz Crystal. Chip Revision v1.1 can support both 26MHz and 40 MHz crystal. For more detailed information about these changes, please refer to ESP8684Series SoC Errata.The embedded chips of the modules and development boards listed in Para 1 will be upgraded accordingly, www.espressif.com Page 3 / 6as they belong to the ESP32-C2 (ESP8684) series. However, there is no change to the integrated crystal onthe modules, which will remain at 26 MHz.4. 变更对比/ Change Comparison请见附录 I：变更对比。Please refer to Appendix I: Change comparison.识别方式/Identification Method:芯片产品通过 eFuse ，产品丝印。模组产品通过主芯片的 eFuse，产品丝印的产品规格标识位，或产品外箱标签中的 PW 号。  开发板产品通过主芯片的 eFuse，模组丝印的产品规格标识位，或产品外箱标签中的 PW 号。Chip products: Identified by eFuse bits, chip marking.Module products: Identified by the chip eFuse, module marking or PW No. on carton box. Development board product: Identified by the chip eFuse, module marking or PW No. on carton box.5.变更影响/ Impact of Change1)品质和性能/ Quality & Performance:变更后的 ESP32-C2 系列芯片可兼容使用 26 MHz 和 40 MHz 晶振。After change, ESP32-C2 chip revision v1.1 supports both 26 MHz and 40 MHz crystal.2)交期/ Delivery:无影响/No impact3)生产料号/ Material Part Numbers (MPN):客户可以继续使用原有的芯片产品订购型号下单；段落 1 中列出的模组的 MPN 不变更，客户可以继续使用原有的模组 MPN 进行下单。Customers can continue using the existing chip ordering codes to place orders.There is no change to the MPN of the affected Espressif modules listed in para 1. Customers can continueto use existing MPN to place orders.4) 认证/ Certification: 无影响/ No impact5) 软件/ IDF：当前的乐鑫 IDF 版本兼容段落 1 列出的变更后的产品，客户可继续使用现有的软件版本进行变更后产品的生产。The current ESP-IDF version is compatible with the changed products listed in Para 1, customers cancontinue to use the current IDF version when using changed products on production and no ESP-IDFupgrade is required. www.espressif.com Page 4 / 66. 变更前后产品处理/ How to Deal with ProductsFIFO7. 相关报告/ Related Report(s):Related ECN No.ECN-2022-042ErrataESP8684 系列芯片勘误表/ ESP8684 Series SoC ErrataRF Performance TestPass8.给使用者的验证建议/ Verification Suggestion To Users建议客户结合实际应用场景进行验证。Suggest customer can do the verification with practical application scenarios. www.espressif.com Page 5 / 6Appendix I 变更对比/ Change ComparisonNo.项目/ Item变更前/ Before Change变更后/ After Change1Chip Revisionv1.0v1.12eFuse 标识位/ eFuse Identification BitsEFUSE_BLK2_DATA1_REG[21]00EFUSE_BLK2_DATA1_REG[20]11EFUSE_BLK2_DATA1_REG[19]00EFUSE_BLK2_DATA1_REG[18]00EFUSE_BLK2_DATA1_REG[17]00EFUSE_BLK2_DATA1_REG[16]013ESP32-C2 Series Chip Marking(Main Die Line)xAAxxxxxxxxBxxxxxxxx4ESP32-C2 Series Module MPNNo change5ESP32-C2 Series Module Marking（Specification Marking Line）XAXXXXXBXXXX www.espressif.com Page 6 / 6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需客户批准的变更/ Change Requiring Customer Approval：a) 客户须在乐鑫发出 PCN 后的 30 天内告知乐鑫已收到 PCN。如客户未在接收到 PCN 后的 30 天内告知已收到，则视为客户收到变更。Customers are requested to acknowledge receipt of the PCN within 30 calendar days from the date ofissue of the PCN. Customers would be considered as notified 30 calendar days after issue of the PCN if noacknowledgement is received.b)自发布PCN之日起90天内，客户没有任何其他反馈，则表示客户接受该PCN。The lack of any additional responses from customers within 90 calendar days from the date of issue of thePCN constitutes acceptance of the proposed changes.客户通知/ Customer Notification：a) 客户需在乐鑫发出 PCN 后 14 天内通知乐鑫收到该 PCN。 如客户未在接收到 PCN 14 日反馈乐鑫，则视为客户确认该 PCN。Customers are requested to acknowledge receipt of the PCN within 14 calendar days from the date ofissue of the PCN. Customers would be considered as having acknowledged the PCN if no response isreceived after 14 calendar days.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/确认 Accepted/Acknowledged不批准/ Rejected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: