Chip Silk Marking

[中文]

Espressif chip silk marking provides information such as chip name, flash size, and operating temperature.

Marking Convention

Diagram showing chip marking information

Chip Silk Marking Diagram

  • Pin 1: Position of Pin 1.

  • Espressif Logo: Company logo.

  • Product Name indicates the chip name.

  • Date Code: WW is the week number of year YYYY. Example: Date Code “122017” stands for the 12th week of year 2017.

  • Flash Code is a code that indicates:

    • (Optional) Temperature and flash size.

    • The tracking information of the in-package flash.

    The arrangement of the flash code can vary by product. Please see Flash Code and PSRAM Code Conventions for details.

  • PSRAM Code is a code that indicates:

    • (Optional) Temperature and PSRAM size.

    • The tracking information of the in-package PSRAM.

    The arrangement of the PSRAM code can vary by product. Please see Flash Code and PSRAM Code Conventions for details.

  • The second character of Espressif Tracking Information correlates to the chip revision. See the detailed mapping in ESP Chip Errata.

Flash Code and PSRAM Code Conventions

Based on the in-package flash or PSRAM, ESP32-C2 chips can be divided into the following categories.

In-package Flash, No PSRAM

This section applies to ESP32-C2 chips with only in-package flash. For such chips, only the flash code is used. PSRAM code is left empty.

In-package Flash, No PSRAM

Flash Code and PSRAM Code Diagram - In-package Flash, No PSRAM

  • Temperature (1 character)

    • H: 105 °C

    • N: 85 °C

    This field is optional.

  • Size (1 character)

    • 2: 2 MB

    • 4: 4 MB

    • 8: 8 MB

    This field is optional.

  • Flash Tracking Information (7 characters): This field is mandatory.