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ST72C254G2 数据表(PDF) 26 Page - STMicroelectronics |
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ST72C254G2 数据表(HTML) 26 Page - STMicroelectronics |
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26 / 135 page ![]() ST72104G, ST72215G, ST72216G, ST72254G 26/135 INTERRUPTS (Cont’d) Figure 15. Interrupt Processing Flowchart Table 5. Interrupt Mapping Note 1. Configurable by option byte. N ° Source Block Description Register Label Priority Order Exit from HALT Address Vector RESET Reset N/A Highest Priority Lowest Priority yes FFFE h-FFFFh TRAP Software Interrupt no FFFCh-FFFDh 0 ei0 External Interrupt Port A7..0 (C5..01) yes FFFA h-FFFBh 1 ei1 External Interrupt Port B7..0 (C5..01) FFF8h-FFF9h 2 CSS Clock Filter Interrupt CRSR no FFF6h-FFF7h 3 SPI SPI Peripheral Interrupts SPISR FFF4h-FFF5h 4 TIMER A TIMER A Peripheral Interrupts TASR FFF2h-FFF3h 5 Not used FFF0h-FFF1h 6 TIMER B TIMER B Peripheral Interrupts TBSR no FFEEh-FFE Fh 7 Not used FFECh-FFE Dh 8 Not used FFEAh-FFEBh 9 Not used FFE8h-FFE 9h 10 Not used FFE6h-FFE 7h 11 I C I C Peripheral Interrupt I2CSRx no FFE4h-FFE 5h 12 Not Used FFE2h-FFE 3h 13 Not Used FFE0h-FFE 1h I BIT SET? Y N IRET? Y N FROM RESET LOAD PC FROM INTERRUPT VECTO R STACK PC, X, A, CC SET I BIT FETCH NEXT INSTR UCTION EXECU TE INSTRUCTION THIS CLEARS I BIT BY DEFAULT RESTORE PC, X, A, CC FROM STACK INTE RRUPT Y N PENDING ? |
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