st72324bk STMicroelectronics, st72324bk Datasheet - Page 163

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

ST72323 ST72323L
AND A,#02
LD Y,A
LD A,X
cp A,#02
jrne OUT
TNZ Y
jrne OUT
LD A,sema
CP A,#01
jrne OUT
call call_routine
OUT:LD A,#00
LD sema,A
.call_routine
PUSH A
PUSH X
PUSH CC
.ext1_rt
LD A,#00
LD sema,A
IRET
; store the level after writing to PxOR/PxDDR
; check for falling edge
; check the semaphore status if edge is detected
; call the interrupt routine
; entry to call_routine
; entry to interrupt routine
Known limitations
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