󳽳󱝾󶴹󱿠DocumentNo.ESP-07-2-007-03󳽳󱝾󱿽󶌇DocumentName󱜂󲄘/󳉉󷐭󱾮󴇠󸶲󵾝Product/ProcessChangeNotice (PCN)󳽳󱝾󵗽󴉆DocumentVersion1.4󱣣󲵙󴈮󹢔RetentionPeriod5 󳌤5years www.espressif.com Page 1 / 6!ESP32-C2󽘘ESP8684󽘙󶥚󱳊󱜂󲄘󵫬󷒠󵗺󵗽󴉆󾗜v1.1 󱻏󶳊󱙚󷒠󵗺󵗽󴉆󾗜v1.2UpgradeESP32-C2(ESP8684)SeriesProductsfromChipRevisionv1.1toChipRevisionv1.2 PCN 󶴹󱿠PCNNo.PCN20231102󳱠󱲡󴀩󴈮IssueDateofPCN2024/01/23󱾮󴇠󴀩󴈮ProposedDateofChange2024/02/23󹲌󸚇󱾮󴇠󲀀󱜂󲄘󹺘󴤤󱲡󸢸󴀩󴈮ProposedDateofFirstShipmentAfterChange2024/03/23PCN 󶡌󲖸 /PCNCategory£󲷱󳧋󹧞󸉔󳩁󱱆/CustomerApprovalRequired R 󲷱󳧋󸶲󵾝/CustomerNotification 1. 󳔈󲄨󱜂󲄘󱿽󶌇/AffectedProductName1) 󷒠󵗺󱜂󲄘 /ChipProducts󾗜ESP8684H2󽘜ESP8684H4 2) 󴝘󶳧󱜂󲄘 /ModuleProducts󾗜󱜂󲄘󱿽󶌇/ProductNameMPNChiponBoardESP8684-MINI-1ESP8684-MINI-1-H2ESP8684H2ESP8684-MINI-1ESP8684-MINI-1-H4ESP8684H4ESP8684-MINI-1UESP8684-MINI-1U-H2ESP8684H2ESP8684-MINI-1UESP8684-MINI-1U-H4ESP8684H4ESP8684-WROOM-01CESP8684-WROOM-01C-H2ESP8684H2ESP8684-WROOM-01CESP8684-WROOM-01C-H4ESP8684H4ESP8684-WROOM-02CESP8684-WROOM-02C-N2ESP8684H2ESP8684-WROOM-02CESP8684-WROOM-02C-N4ESP8684H4ESP8684-WROOM-02CESP8684-WROOM-02C-H4ESP8684H4ESP8684-WROOM-02UCESP8684-WROOM-02UC-N2ESP8684H2ESP8684-WROOM-02UCESP8684-WROOM-02UC-N4ESP8684H4ESP8684-WROOM-02UCESP8684-WROOM-02UC-H2ESP8684H2 www.espressif.com Page 2 / 6 ESP8684-WROOM-02UCESP8684-WROOM-02UC-H4ESP8684H4ESP8684-WROOM-03ESP8684-WROOM-03-H2ESP8684H2ESP8684-WROOM-03ESP8684-WROOM-03-H4ESP8684H4ESP8684-WROOM-04CESP8684-WROOM-04C-H2ESP8684H2ESP8684-WROOM-04CESP8684-WROOM-04C-H4ESP8684H4ESP8684-WROOM-05ESP8684-WROOM-05-H2ESP8684H2ESP8684-WROOM-05ESP8684-WROOM-05-H4ESP8684H4ESP8684-WROOM-06CESP8684-WROOM-06C-H2ESP8684H2ESP8684-WROOM-06CESP8684-WROOM-06C-H4ESP8684H4ESP8684-WROOM-07ESP8684-WROOM-07-H2ESP8684H2ESP8684-WROOM-07ESP8684-WROOM-07-H4ESP8684H43) 󳐴󱾥󴋄󱜂󲄘/DevelopBoardProducts: 󱜂󲄘󱿽󶌇/ProductNameMPNESP8684-DevKitM-1ESP8684-DevKitM-1-H4ESP8684-DevKitM-1U-H42. 󱾮󴇠󱽓󲒵/ReasonforChange󱞰󱹫 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󶐀󹠡󱣭󸹅󸚪󱟏 (ClearChannelAssessment,CCA) 󵸒󱯃󶁞󱝾󸚤󸚇󹢎󱟼󱟼󱶧󶼓󷥑󵘦 (Bluetooth®LE)CCA 󱶧󷃫󳐴󲀸󵚱󳗷󴀿󵵙󱜂󲄘 CPU 󱻲󴈄󵠈󴩐󷟦 1 󱳊󱲡󵵙󴝘󶳧󲃅󳐴󱾥󴋄务󱡋󵫞󵵙󱙛󷒠󵗺󱙚 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󽘜󲒵󴦝󴩐󷟦 1 󱳊󱲡󵵙󴝘󶳧󲃅󳐴󱾥󴋄󱜂󲄘󱚓󸴔󸀅󵸒󳍟󵵙󴇠󳾾EspressifupgradedthechipversionofESP32-C2(ESP8684)toimproveClearChannelAssessment(CCA)relatedhardwaredesign.WhentheBluetooth®LowEnergy(BluetoothLE)CCAfunctionisenabled,theCPUusageoftheESP32-C2(ESP8684)serieschipswithupgradedchiprevisionv1.2willexperienceaslightdecrease.Themainchipsusedinthemodulesanddevelopmentboardslistedinparagraph1areESP32-C2 (ESP8684) chips, so these modules and development boards have also been updatedaccordingly.3. 󱾮󴇠󳱞󸵄/DescriptionofChange󲺧󷒠󵗺󵗽󴉆󱙚 v1.1 󵵙 ESP32-C2(ESP8684) 󷒠󵗺󸴔󸀅󱙛󴄋󲓱󹄥󲽊󲼜󸚤󸚇󱾮󴇠󽘜󱝃󶻽󲺽󷒠󵗺󵗽󴉆󱻏󶳊󱙚 v1.2󴩐󷟦 1 󱳊󱲡󵵙󴝘󶳧󲃅󳐴󱾥󴋄󱜂󲄘务󱡋󵫞󵵙󱙛󷒠󵗺󱙚 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󽘜󲒵󴦝󴩐󷟦 1 󱳊󱲡󵵙󴝘󶳧󲃅󳐴󱾥󴋄󱜂󲄘󱚓󸴔󸀅󵸒󳍟󵵙󴇠󳾾ESP32-C2(ESP8684) chipsrevisionv1.2 isa metallayer design changeto thechip revision v1.1.ThemodulesanddevelopmentboardlistedinPara1arebasedonESP32-C2(ESP8684)seriesofchips,andthuswillchangeaccordingly.  www.espressif.com Page 3 / 6 4. 󱾮󴇠󲺧󴪒/ChangeComparison󸛝󸊼󹢂󳓗 I󾗜󱾮󴇠󲺧󴪒PleaserefertoAppendixI:Changecomparison.󸚬󱳧󳿑󳑎/IdentificationMethod: 󷒠󵗺󱜂󲄘󸶲󸳣 eFuse󽘜󱜂󲄘󱘰󱼋 󴝘󶳧󱜂󲄘󸶲󸳣󱙛󷒠󵗺󵵙 eFuse󽘜󱜂󲄘󱘰󱼋󵵙󱜂󲄘󸊿󴏵󴎜󸚬󱟺󽘜󳦕󱜂󲄘󲡋󶚓󴎜󶘫务󵵙 PW 󱿠   󳐴󱾥󴋄󱜂󲄘󸶲󸳣󱙛󷒠󵗺󵵙 eFuse󽘜󴝘󶳧󱘰󱼋󵵙󱜂󲄘󸊿󴏵󴎜󸚬󱟺󽘜󳦕󱜂󲄘󲡋󶚓󴎜󶘫务󵵙 PW 󱿠 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. 󱾮󴇠󳔈󲄨/ImpactofChange1) 󲄘󸢹󲃅󳘮󷃫/Quality&Performance: 󴀞󱘗󷐜󳔈󲄨/Noadverseimpact.󲔩󳐴󲀸󱟼󱶧󶼓󷥑󵘦 CCA 󱶧󷃫󵵙󳜵󱰤󱘕󽘜󷒠󵗺󵗽󴉆󱙚 v1.2 󵵙 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󵵙 CPU 󱻲󴈄󵠈󱞵󴈄󱘈󱛩󹢎󱟼󱡟󲤖󽘜 CPU 󸳹󸀅󹲙󵠈󱙚 120MHz󽘜󳓓󱘈󱙂󱟼󱶧󶼓󷥑󵘦󸴗󳰚󹠣󹤍󱙚 100ms󽘜󴪇󱙂󸴗󳰚󹠣󹤍󴈄󱘈󲺧󳻱󱾥󱹌󵵙󳜵󱰤󱘕󽘜󷒠󵗺󵗽󴉆󱙚 v1.2 󵵙 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󱞵󱱙󲻒󶳉 0.015% 󵵙 CPU󸣕󴻣󱻲󵫞󴱅󳞲󾗜󳓓󱴙 ESP-IDF 󸴏󴉃󳐴󳻿󱟼󱶧󶼓󷥑󵘦 CCA 󱶧󷃫󷒠󵗺󵗽󴉆󱙚 v1.2 󵵙 ESP32-C2(ESP8684) 󶥚󱳊󷒠󵗺󲔩󳐴󲀸󱟼󱶧󶼓󷥑󵘦 CCA 󱶧󷃫󴀿󽘜CPU 󱻲󵫞󱘙󴉃󳐴󲀸󱟼󱶧󶼓󷥑󵘦 CCA 󴀿󱣣󳬐󱘈󷋾WhentheBluetoothLECCAfeatureisenabled,theCPUusageofESP32-C2(ESP8684)serieschipswithchiprevisionv1.2willexperienceaslightdecrease.Forexample,ataCPUoperatingfrequencyof120MHz,withtheBluetoothLEconnectionintervalsetto100msandapairoftransmitandreceivepacketsforeachconnectioninterval,theESP32-C2(ESP8684)serieschipswithchiprevisionv1.2willreduceCPUresourceusagebyapproximately0.015%.Note:ESP-IDFdoesnotsupporttheBluetoothLECCAfeatureyet.ForESP32-C2(ESP8684)serieschipswithchiprevisionv1.2,whentheBluetoothLECCAfeatureisenabled,CPUusageremainsconsistentwithwhenBluetoothLECCAisnotenabled.2) 󱛽󴈮/Delivery: 󴀞󳔈󲄨/Noimpact3) 󵫑󱜂󳾒󱿠/MaterialPartNumbers(MPN):󲷱󳧋󱿔󱝥󶴊󶴐󱡋󵫞󱽓󴈄󵵙󷒠󵗺󱜂󲄘󸚈󸢾󲖸󱿠󱘕󱻡󾗝󴩐󷟦 1 务󱳊󱲡󵵙󴝘󶳧󵵙 MPN 󱘗󱾮󴇠󽘜󲷱󳧋󱿔󱝥󶴊󶴐󱡋󵫞󱽓󴈄󵵙󴝘󶳧 MPN 󸴔󸀅󱘕󱻡Customerscancontinueusingtheexistingchiporderingcodestoplaceorders. www.espressif.com Page 4 / 6 There is no change to the MPN of the affected Espressif modules listed in para 1. Customers cancontinuetouseexistingMPNtoplaceorders.4) 󸚊󸚧/Certification: 󴀞󳔈󲄨/Noimpact5) 󸱒󱝾/IDF󾗜ESP-IDFv5.0 󱙚󹺘󴤤󳻦󳬐 ESP32-C2 󶥚󱳊󷒠󵗺󵵙 ESP-IDF 󵗽󴉆󽘜󸛋󵗽󴉆󱯐󲸣󱾮󴇠󲀀󵵙 ESP32-C2 󶥚󱳊󱜂󲄘󽘜󲷱󳧋󱿔󶴊󶴐󱡋󵫞 ESP-IDFv5.0 󱾛󱙴󲀀󵵙 IDF 󵗽󴉆󸴔󸀅󱾮󴇠󲀀󱜂󲄘󵵙󵫑󱜂󱟼󱶧󶼓󷥑󵘦 CCA 󱶧󷃫󲔩 ESP-IDF 󱿱󵗽󴉆󱘔󵵙󳻦󳬐󵚱󳗷󽘜󱿔󱾍󸊼󴦝󲠦 ESP-IDF v5.0 is the first IDF version to support ESP32-C2 series products. This version is alreadycompatible with the updated ESP32-C2 series products listed in Para 1, allowing customers tocontinueusingESP-IDFv5.0andlaterversionsfortheupdatedproducts.ForthesupportstatusoftheBluetoothLECCAfeatureacrossvariousESP-IDFversions,pleaserefertohere.6. 󱾮󴇠󱴙󲀀󱜂󲄘󲠦󵢻/HowtoDealwithProductsFIFO7. 󵸒󱯃󳪄󲁨/RelatedReport(s):R RFPerformanceTestPass8. 󶳼󱡋󵫞󶻰󵵙󺀪󸚧󳐫󸚔/VerificationSuggestionToUsers󳐫󸚔󲷱󳧋󶳶󱿷󲷫󹢃󳍟󵫞󲔿󴃿󸴔󸀅󺀪󸚧Suggestcustomercandotheverificationwithpracticalapplicationscenarios. www.espressif.com Page 5 / 6 AppendixI 󱾮󴇠󲺧󴪒/ChangeComparison1. 󱜂󲄘󲙨󴉆󱣭󳚣/ProductBasicInformation2. 󷒠󵗺 eFuse 󱣭󳚣/ChipeFuseInformationeFuseIdentificationBitseFuse 󴎜󸚬󱟺󷒠󵗺󵗽󴉆/ChipRevisionv0.0v1.0v1.1v1.2MajorNumberEFUSE_BLK2_DATA1_REG[21]0000EFUSE_BLK2_DATA1_REG[20]0111MinorNumberEFUSE_BLK2_DATA1_REG[19]0000EFUSE_BLK2_DATA1_REG[18]0000EFUSE_BLK2_DATA1_REG[17]0001EFUSE_BLK2_DATA1_REG[16]0010 No.󹲁󵸂/Item󱾮󴇠󱴙/BeforeChange󱾮󴇠󲀀/AfterChange1ChipRevisionv1.1v1.22ESP32-C2SeriesChipMarking(MainDieLine)xBxxxxxxxxCxxxxxxxx3ESP32-C2SeriesModuleMPN Nochange4ESP32-C2SeriesModuleMarking 󽘘SpecificationMarkingLine󽘙XBXXXXMCXXXX www.espressif.com Page 6 / 6 󸼒󱝾󸚈󹠴EspressifEmailNotifications󱙺󹘺󱙚󴱅󱯤󵫞󳧋󳱠󱡹󵫰󲵊󸼒󱝾󸶲󵾝󴈋󱶪󽘜󵫞󳧋󱿔󸶲󸳣󱙺󹘺󸚈󹠴󶥚󶴂󳰚󳻱󳩏󴉊󳽳󴐴󴇠󳾾󳾾󹠪󸶲󸚕PCN 󶖾󸼒󱝾󸶲󵾝Espressifsendsemailnotificationsoftechnicaldocumentationchanges,alongwithnewsletters,PCNsandothervaluableinformation,tosubscribedcustomersonly.Ifyouwishtostayupdatedonourproductsandservices,pleasesubscribehere.󲷱󳧋󲄨󳍟󸉔󴭁CustomerResponseRequirements󹧞󲷱󳧋󳩁󱱆󵵙󱾮󴇠/ChangeRequiringCustomerApproval󾗜a) 󲷱󳧋󹲃󲔩󱙺󹘺󱾥󱲡 PCN 󲀀󵵙 30 󲡵󱯜󲁨󵾝󱙺󹘺󳉛󳻱󱳭 PCN󲤖󲷱󳧋󴉃󲔩󳰚󳻱󱳭 PCN 󲀀󵵙 30 󲡵󱯜󲁨󵾝󳉛󳻱󱳭󽘜󱳎󸋁󱙚󲷱󳧋󳻱󱳭󱾮󴇠CustomersarerequestedtoacknowledgereceiptofthePCNwithin30calendardaysfromthedateofissueofthePCN.Customerswouldbeconsideredasnotified30calendardaysafterissueofthePCNifnoacknowledgementisreceived.  b) 󷋩󱾥󳉳 PCN 󱙴󴀩󸤑 90 󲡵󱯜󽘜󲷱󳧋󴯖󴈄󱞄󱠇󱯇󱝎󱾠󹺊󽘜󱳎󸀮󶆺󲷱󳧋󳰚󱾭󸛋 PCNThelackofanyadditionalresponsesfromcustomerswithin90calendardaysfromthedateofissueofthePCNconstitutesacceptanceoftheproposedchanges.󲷱󳧋󸶲󵾝/CustomerNotification󾗜a) 󲷱󳧋󹧞󲔩󱙺󹘺󱾥󱲡 PCN 󲀀 14 󲡵󱯜󸶲󵾝󱙺󹘺󳻱󱳭󸛋 PCN 󲤖󲷱󳧋󴉃󲔩󳰚󳻱󱳭 PCN14 󴀩󱾠󹺊󱙺󹘺󽘜󱳎󸋁󱙚󲷱󳧋󶁢󸚊󸛋 PCNCustomersarerequestedtoacknowledgereceiptofthePCNwithin14calendardaysfromthedateofissueofthePCN.CustomerswouldbeconsideredashavingacknowledgedthePCNifnoresponseisreceivedafter14calendardays.󸛝󱾠󹺊󷋼 pcn@espressif.comPleasesendfeedbacktopcn@espressif.com. 󲷱󳧋󳩁󱱆/󶁢󸚊󱣭󳚣CustomerApproval/AcknowledgementandRemarks󲷱󳧋󱮷󱿡󱮭󶌇󾗜Customer’sCompanyName:PCN 󸚪󲷯󶳶󴋴/PCNReviewResult󾗜£󳩁󱱆/󶁢󸚊 Accepted/Acknowledged £󱘗󳩁󱱆/Rejected £󹧞󸉔󱲵󴋡/FurtherAnalysisRequired 󲷱󳧋󳞲󸊼/Comment: 󱮷󱿡󱝠󸀮󱜤󲧚󱿽Representative’sName:󱮷󱿡󱝠󸀮󱜤󶾀󸢴Representative’sJobTitle:󱮷󱿡󱝠󸀮󱜤󶘫󱿽Representative’sSignature:󴀩󴈮Date: