User`s manual

Engineering Bulletin

Programming the FLASH Array

EB183 — Rev. 1.0

MOTOROLA 13

;------------------------------------------------

;--------- Error Subroutine -------------

;------------------------------------------------

ERROR: MOVB #$00,$0000 ;Clear Port A

MOVB #$FF,$0002 ;Set DDRA to outputs

BLINK MOVB #$01,$0000 ;Turn PA0 on for error output

BSR dly_100ms

MOVB #$00,$0000 ;Turn PA0 off

BSR dly_100ms

BRA BLINK ; Repeat ad nauseum....

;-------------------------------------------------------------

;--------- Delay Subroutines (8MHz e clock) -------------

;-------------------------------------------------------------

dly_100ms: LDY #$000A ; Delay for 100ms

DLOOP10: DEY

BSR dly_10ms

BNE DLOOP10

RTS

dly_10ms: LDD #$3E7E ; Delay for 10ms

DLOOP: SUBD #1

BNE DLOOP

RTS

dly_22us: LDD #$0023 ; Delay for almost 22µs

d_22u SUBD #1

BNE d_22u

RTS

dly_10us: LDD #$0010 ; Delay for 10µs

d_10u SUBD #1

BNE d_10u

RTS

DATA FCB "Motorola Microcontrollers"

FCB $00

END