Datasheet

AVR068

2591C-AVR-06/06

5.2.8 CMD_PROGRAM_FUSE_ISP

This command programs the fuses of the target device.

Table 5-27. Command format

Field Size Values Description

Command ID 1 byte CMD_PROGRAM_FUSE_ISP Command id

cmd1 1 byte Command Byte #1

cmd2 1 byte Command Byte #2

cmd3 1 byte Command Byte #3

cmd4 1 byte Command Byte #4

Note: cmd1, cmd2, cmd3 and cmd4 are the four bytes of the low-level program fuse ISP

command

Table 5-28. Answer format

Field Size Values Description

Answer ID 1 byte CMD_PROGRAM_FUSE_ISP Answer id

Status1 1 byte STATUS_CMD_OK Will always read OK

Status2 1 byte STATUS_CMD_OK Will always read OK

5.2.9 CMD_READ_FUSE_ISP

This command reads the fuses of the target device.

Table 5-29. Command format

Field Size Values Description

Command ID 1 byte CMD_READ_FUSE_ISP Command id

RetAddr 1 byte XML: pollIndex Return address

cmd1 1 byte Command Byte #1

cmd2 1 byte Command Byte #2

cmd3 1 byte Command Byte #3

cmd4 1 byte Command Byte #4

Note: RetAddr indicates after which of the transmitted bytes on the SPI interface to store

the return byte, as the SPI interface is implemented as a ring buffer (one byte out,

one byte in)