4.3.1.1 Extension Boards

Token: 0xE1

The EDBG has 10 pins designated for extension board identification. These pins are sampled on power-up and the extension board identification information is stored. This information can be retrieved by using the Extension Boards token.

The first part of the response from this request is a 2-byte BE (1st byte is MSB) extension map containing information of which extension slots are populated. A '1' in bit 0 of the extension map means that EXT1 is populated, a '0' means not populated. If there are extension modules present the 64-byte content of each of the ID chips is sent. It will start with EXT1. If the extension is present it will send the content, otherwise no data is sent.

Example: Extension boards are available in EXT2 and EXT5. The response will be:

  • 0x00 (Extension map MSB)

  • 0x12 (Extension map MSB)

  • 0x41 'A' (First byte in EXT2 ID content)

  • 0x74 't' (Second byte)

  • 0x6D 'm' (Third byte)

  • 0x65 'e' (Fourth byte)

  • 0x6C 'l' (Fifth byte)

  • 0x53 'S' (Sixth byte)

  • ... Remaining 58 bytes

  • 0x41 'A' (First byte in EXT5 ID content)

  • 0x74 't' (Second byte)

  • 0x6D 'm' (Third byte)

  • ... Remaining 61 bytes

  • 0x00 (End of data)