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ST72321R7-Auto Datasheet(PDF) 236 Page - STMicroelectronics |
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ST72321R7-Auto Datasheet(HTML) 236 Page - STMicroelectronics |
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236 / 243 page  Known limitations ST72321xx-Auto 236/243 Doc ID 13829 Rev 1 ; check the semaphore status if edge is detected CP A,#01 jrne OUT call call_routine ; call the interrupt routine OUT:LD A,#00 LD sema,A .call_routine ; entry to call_routine PUSH A PUSH X PUSH CC .ext1_rt ; entry to interrupt routine LD A,#00 LD sema,A IRET Case 2: Writing to PxOR or PxDDR with global interrupts disabled: SIM ; set the interrupt mask LD A,PFDR AND A,#$02 LD X,A ; store the level before writing to PxOR/PxDDR LD A,#$90 LD PFDDR,A ; Write into PFDDR LD A,#$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 |
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