The syntax of the "F" command is:
F[ ]#
where [ ] means zero or more spaces,
"#" is a numeric value (0 to 255, 0x0 to 0xFF, -1 to -254), but:
0 selects the FUSE LOW byte,
1 selects the LOCK BITS byte,
2 selects the EXTENDED FUSE byte,
3 selects the FUSE HIGH byte, and
any other value is undefinded (but may report some numeric value)
Notes:
No distinction is made between uppercase and lowercase commands.
Only a single numeric value is parsed
The numeric value may be specified in either decimal or hexadecimal format.
Anything after the first numeric value is ignored.
This is really a simple command. These are all the commands and the expected responses:
>F 0
Value returned: 0xE2
>F 2
Value returned: 0xFE
>F3
Value returned: 0xD0
>F 1 ; The LOCK bits
Value returned: 0xCC
>
See also:
The ReadFuseByte system routine.