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ST7232A 数据表(PDF) 32 Page - STMicroelectronics |
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ST7232A 数据表(HTML) 32 Page - STMicroelectronics |
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32 / 157 page  ST7232A 32/157 INTERRUPTS (Cont’d) Table 7. Dedicated Interrupt Instruction Set Note: During the execution of an interrupt routine, the HALT, POPCC, RIM, SIM and WFI instructions change the current software priority up to the next IRET instruction or one of the previously mentioned instructions. Instruction New Description Function/Example I1 H I0 N Z C HALT Entering Halt mode 1 0 IRET Interrupt routine return Pop CC, A, X, PC I1 H I0 N Z C JRM Jump if I1:0=11 (level 3) I1:0=11 ? JRNM Jump if I1:0<>11 I1:0<>11 ? POP CC Pop CC from the Stack Mem => CC I1 H I0 N Z C RIM Enable interrupt (level 0 set) Load 10 in I1:0 of CC 1 0 SIM Disable interrupt (level 3 set) Load 11 in I1:0 of CC 1 1 TRAP Software trap Software NMI 1 1 WFI Wait for interrupt 1 0 1 |
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