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 Page1/3ESP32-C3-WROOM-02U 量产 BOM 更新BOM Change for ESP32-C3-WROOM-02UPCN 编号PCN No.PCN20221201提出日期Issue Date of PCN2022/12/26变更日期Proposed Date of Change2022/01/14预计变更后产品首次出货日期Proposed Date of FirstShipment After Change2023/01/20PCN 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 NameModulePart NumberESP32-C3-WROOM-02UESP32-C3-WROOM-02U-N4ESP32-C3-WROOM-02U-H4DevKitPart NumberESP32-C3-DevKitC-02UESP32-C3-DevKitC-02U2. 变更原因/ Reason for Change更改 ESP32-C3-WROOM-02U 模组上 L1 和 C7 位号的物料规格，以优化产品 EMC 性能。Materials on the placement of L1 and C7 are going to be changed in order to optimize the EMC performanceof the module.3. 变更描述/ Description of Change更改 ESP32-C3-WROOM-02U 模组上 L1 和 C7 位号的物料规格，以优化模组 EMC 性能。同步地，开发板 ESP32-C3-DevKitC-02U 上的模组物料更新为变更后的 ESP32-C3-WROOM-02U 模组。Materials on the placement of L1 and C7 are going to be changed in order to optimize the EMC performanceof the module.Simultaneously, the ESP32-C3-WROOM-02U module mounted on the ESP32-C3-DevKitC-02U are going tobe replaced as well.4. 变更对比/ Change ComparisonComponent on the ModuleSpecification Before ChangeSpecification After ChangeL10 Ω2.0 nHC7NC0.1 uF www.espressif.com Page2/35.变更影响/ Impact of Change1)品质和性能/ Quality & Performance:提升模组EMC性能，更好地满足FCC认证要求。EMC performance of the module will be optimized for meeting FCC requirement.2)交期/ Delivery:无影响/ No impact.3)生产料号/ Material Part Numbers (MPN):无影响/ No impact.4)认证/ Certification:提升模组的EMC性能；对已有的认证无影响。EMC performance of the module will be optimized and this change does not impact the validity of acquiredcertificates.5)软件/ IDF:无影响/ No impact.6. 变更前后产品处理/ How to Deal with ProductsFIFO7. 相关报告/ Related Report(s):Related ECN No.ECN-2022-044射频性能验证/ RF Performance Verification：Pass www.espressif.com Page3/3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: