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ST10F296 数据表(PDF) 137 Page - STMicroelectronics |
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ST10F296 数据表(HTML) 137 Page - STMicroelectronics |
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137 / 346 page  Obsolete Product(s) - Obsolete Product(s) ST10F296E Parallel ports 137/346 13.4.3 Port 2 and external interrupts These interrupt inputs are provided to service external interrupts which have high precision requirements. These fast interrupt inputs feature programmable edge detection (rising edge, falling edge, or both edges). Fast external interrupts may also have interrupt sources selected from other peripherals. For example, the CANx controller receive signal (CANx_RxD) can be used to interrupt the system. This new function of the ST10F296E is controlled using the ‘external interrupt source selection’ register (EXISEL). External interrupt source selection register (EXISEL) EXISEL (F1DAh/EDh) ESFR Reset value: 0000h 15 14 13 12 11 10 9 8 7 6 5 4 3210 EXI7SS EXI6SS EXI5SS EXI4SS EXI3SS(1) 1. Alarm interrupt request (RTCAI) is linked with EXI3SS EXI2SS(2) 2. Timed interrupt request (RTCSI) is linked with EXI2SS EXI1SS EXI0SS R/W R/W R/W R/W R/W R/W R/W R/W Table 75. EXISEL register description Bit Bit name Function 15-0 EXIxSS External interrupt x source selection (x = 7 to 0) 00: Input from associated Port 2 pin 01: Input from ‘alternate source’(1) 10: Input from Port 2 pin ORed with ‘alternate source’(1) 11: Input from Port 2 pin ANDed with ‘alternate source’ 1. Advised configuration Table 76. External interrupt selection EXIxSS Port 2 pin Alternate source 0 P2.8 CAN1_RxD P4.5 1 P2.9 CAN2_RxD/SCL P4.4 2 P2.10 RTCSI (second) Internal MUX 3 P2.11 RTCAI (alarm) Internal MUX 4 to 7 P2.12 to 15 Not used (zero) - Obsolete Product(s) - Obsolete Product(s) |
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