I am using the MC9S08GT16, CW 6.3, P+E USB multilink
In Debug I can see the IGC trim value in 0x004E matches the FLASH value in 0xFFBE
Resetting the part through the debugger also places the value from Flash into the IGC trim reg (or at least they are the same)
The problem is when the debugger is not attached and I do a power cycle. Fortunately on this particular chip the trim is almost 0 (actually 0x88) so I can communicate via serial port. When I look at register 0x004E it has the default value (0x80) even though the flash has the value 0x88.
Does the part actually use location 0xFFBE on reset? Spec sheet says it does.