1.2.4 Device Revision

The package marking on Microchip security devices does not identify the device type. Therefore, the package marking cannot be used to identify the ATECC608B device. The only way to identify the device is through use of the device revision. The hardware device revision can be read by using the Revision mode (0x00) of the Info command. The output response of the Info command for each device is as follows:
DeviceInfo Command Revision Mode Response2
ATECC508A0x00 0x00 0x50 0x00
ATECC608B0x00 0x00 0x60 0x031
Note:
  1. The value of the fourth byte may change over time, but it is 0x03 at the time of the initial product release.
  2. The value of the Revision mode response is not the same as the 4-byte RevNum (Bytes[4:7]) in the device configuration zone. Only the Revision mode response can be used for device identification.