Intel 8XC196MH Benutzerhandbuch

16-33

The calling routine must pass two parameters to this routine — the data to be programmed (in
DATA_TEMP) and the address (in ADDR_TEMP). 

PROGRAM:

PUSHA

;clear PSW, WSR, INT_MASK, INT_MASK1

LD

WSR,#7BH

;select 32-byte window with EPA0_CON

LD

COUNT,#5

;set up for 5 programming cycles

ANDB INT_PEND,#CLEAR_EPA0

;clear EPA0 pending bit

LDB

INT_MASK,#ENABLE_EPA0

;enable EPA0 interrupt

LDB

EPA0_CON,#EPA0_TIMER

;set up EPA0 as software timer

LOOP:

LD

TEMP0,TIMER1

;load TIMER1 value into TEMP0

ADD

EPA0_TIME,TEMP0,#PGM_PULSE

;load EPA0_TIME with TIMER1 + PGM_PULSE

EI

;enable unmasked interrupt(EPA0)

ST

DATA_TEMP,[ADDR_TEMP]

;store passed data at passed address

IDLPD #1

;enter idle mode

DJNZ COUNT,LOOP

;decrement COUNT and loop if not 0
;to complete 5 programming cycles

POPA

;restore PSW, WSR, and INT_MASKs

RET

EPA0_ISR:

RET