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 Version1.3保存期限Retention Period5 年5 yearswww.espressif.com Page1/5取消 ESP32 (8 MB/16 MB flash) 系列模组产品出厂配置通用 AT 固件Espressif common AT firmware is not flashed to ESP32 series of modules (8MB/16MB flash) bydefault from the manufacturing linePCN 编号PCN No.PCN-2021-005提出日期Issue Date of PCN20210412变更日期Proposed Date of Change20210430首次出货日期Proposed Date of FirstShipment20210528PCN 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 NameESP32-WROOM-32X（8MB/16MB flash)系列模组，具体模组型号如下：ESP32-WROOM-32X (8MB/16MB flash) Series Modules，modules name as below:ESP32-WROOM-32 / ESP32-WROOM-32D / ESP32-WROOM-32UESP32-WROOM-32E / ESP32-WROOM-32UE2.变更原因/Reason for Change根据对客户实际使用情况的调查，大部分采购ESP32（8 MB或16 MB flash）系列模组的客户，未使用出厂时配置的乐鑫通用AT固件，故上述段落1中的模组出厂前将不烧录通用AT固件。Espressif has checked our customers’ actual use cases and identified most of our customers of theabove-mentioned variants in Para actually do not use the default common AT firmware flashed to thosevariants from the manufacturing line. Therefore, Espressif will not flash the common AT firmware to the 8MB/16 MB flash variants of the above-mentioned modules in Para 1 any more.3. 变更描述/Description of ChangeESP32 （8 MB 或 16 MB flash ）系列模组出货时，不配置通用 AT 固件。No Espressif common AT firmware will be flashed to the 8 MB and 16 MB flash variants of the modules listedin Para 1.4. 变更对比/Change Comparison请见附录 I：变更对比。Please refer to Appendix I: Change comparison.变更识别方式/Change Identification Method通过包装标签信息识别该变更。Identify the change by querying the Package Label Information. www.espressif.com Page2/55.变更影响/Impact of Change1)品质和性能/ Quality & Performance:由于产品的硬件未做变更，如贵司不使用上述模组出厂配置的乐鑫通用AT固件，则此变更对产品品质、性能及使用均无影响；Suppose you don't use the Espressif common AT firmware. In that case, the quality, performance, and usecases of those variants mentioned in Para 1 are not affected for your cases because no hardware changeis introduced.如贵司使用上述模组模组出厂时配置的乐鑫通用AT固件(非二次开发)，请及时联系对接的商务人员或sales@espressif.com，我们将提供定制生产，或者协助您评估替换对应的4 MB模组，为您降低成本。Otherwise, please contact your business contacts at Espressif or via sales@espressif.com. We will eitherprovide customized production to your needs or assist you to switch from the 8 MB / 16 MB flash variantsto the 4 MB flash variants, if possible.2)交期/Delivery:无/None3)生产料号/Material Part Numbers (MPN):无/None4)认证/Certification:无/None5)其他/Others:无/None6.变更前后产品处理/How to Deal with ProductsFIFO针对客户特殊要求的AT版本，按照客户实际要求执行。FIFO. Please proceed as requested if customers request a particular AT firmware version.7. 相关报告/Report(s) Attached:Related ECN No.ECN-2021-013Material Qualification ReportPerformance Test ReportReliability Test ReportEnvironment Related Report(RoHS / REACH / HF etc.)CertificationOther Reports (Pls specify) www.espressif.com Page3/5Appendix I 变更对比/Change Comparison变更前Before Change变更后After Change www.espressif.com Page4/5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 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 www.espressif.com Page5/5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: