ST72F324J6TATX 查看數據表（PDF） - STMicroelectronics

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ST72F324J6TATX

8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI

STMicroelectronics 

ST72324xx-Auto

Known limitations

Case 1: Writing to PxOR or PxDDR with global interrupts enabled:

LD A,#01

LD sema,A; set the semaphore to '1'

LD A,PFDR

AND A,#02

LD X,A; store the level before writing to PxOR/PxDDR

LD A,#$90

LD PFDDR,A ; Write to PFDDR

LD A,#$ff

LD PFOR,A ; Write to PFOR

LD A,PFDR

AND A,#02

LD Y,A; store the level after writing to PxOR/PxDDR

) LD A,X; check for falling edge

t(s cp A,#02

jrne OUT

uc TNZ Y

d jrne OUT

ro LD A,sema ; check the semaphore status if edge is detected

P CP A,#01

jrne OUT

te call call_routine ; call the interrupt routine

le OUT:LD A,#00

o LD sema,A

bs .call_routine ; entry to call_routine

PUSH A

- O PUSH X

) PUSH CC

t(s .ext1_rt ; entry to interrupt routine

LD A,#00

uc LD sema,A

d IRET

ro Case 2: Writing to PxOR or PxDDR with global interrupts disabled:

P SIM ; set the interrupt mask

teLD A,PFDR

leAND A,#$02

o LD X,A ; store the level before writing to PxOR/PxDDR

bs LD A,#$90

O LD PFDDR,A ; Write into PFDDR

LD A,#$ff

LD PFOR,A ; Write to PFOR

LD A,PFDR

AND A,#$02

LD Y,A ; store the level after writing to PxOR/PxDDR

LD A,X ; check for falling edge

cp A,#$02

jrne OUT

TNZ Y

jrne OUT

LD A,#$01

LD sema,A ; set the semaphore to '1' if edge is detected

Doc ID 13841 Rev 1

187/193

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