Re: m68hc11f1 in Bootstrap mode
- Hello Mike
I think I found the problem with my board, not too sure though.
On checking the CONFIG register I found it contains $ff. According to
the manual it should be $0f, as from the factory.
I did try and program it, but the program wont work, do you think you
could cast your eyes on this code and possibly suggest some
correction with your expert knoledge.
dly10 equ 10000/3
ldab #$0f ;data to program
ldy #$103f ;config address
ldaa #02 ;eelat = 1 eepgm =0
staa $103b ;set eelat bit
stab $103f ;store data to be programmed
ldab #$03 ;eelat = 1 eepgm = 1
stab $103b ;turn programming voltage on
staa $1004 ;check data in portb
- Hello Mike
I have finally managed to get around to putting those pullup resistor
on the inconected pins. However, the problem of zeroing the output
ports still persistes. The only thing I have been unable to do is put
in the new chip. I don't have an extracter tool just yet, with it
being 68 pin PLCC.
I was reading a report by (Motorola An997)that the config register
can cause some very strange things to happen in these devices if care
is not taken to prevent it. I need to give it a second reading.
Have you had any new ideas as to what could be the problem.