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ST7DALIF2 数据表(PDF) 49 Page - STMicroelectronics |
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ST7DALIF2 数据表(HTML) 49 Page - STMicroelectronics |
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49 / 171 page  ST7DALIF2 Interrupts 49/171 Bits 5:4 = ei2[1:0] ei2 pin selection These bits are written by software. They select the Port B I/O pin used for the ei2 external interrupt according to the table below. Bit 3:2 = ei1[1:0] ei1 pin selection These bits are written by software. They select the Port A I/O pin used for the ei1 external interrupt according to the table below. Bits 1:0 = ei0[1:0] ei0 pin selection These bits are written by software. They select the Port A I/O pin used for the ei0 external interrupt according to the table below. Table 17. External interrupt I/O pin selection ei31 ei30 I/O pin 0 0 PB0 (1) 1. Reset state 0 1 PB1 1 0 PB2 Table 18. External interrupt I/O pin selection ei21 ei20 I/O pin 0 0 PB3 (1) 1. Reset state 0 1 PB4 (2) 2. PB4 cannot be used as an external interrupt in Halt mode. 1 0 PB5 1 1 PB6 Table 19. External interrupt I/O pin selection ei11 ei10 I/O pin 00 PA4 01 PA5 10 PA6 11 PA7(1) 1. Reset state Table 20. External interrupt I/O pin selection ei01 ei00 I/O pin 00 PA0 (1) 1. Reset state 01 PA1 10 PA2 11 PA3 |
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