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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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ST7LITE0X Scheda tecnica(PDF) 32 Page - STMicroelectronics |
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ST7LITE0X Scheda tecnica(HTML) 32 Page - STMicroelectronics |
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32 / 125 page  ST7LITE0x, ST7LITESx 32/125 INTERRUPTS (Cont’d) EXTERNAL INTERRUPT CONTROL REGISTER (EICR) Read/Write Reset Value: 0000 0000 (00h) Bit 7:6 = IS3[1:0] ei3 sensitivity These bits define the interrupt sensitivity for ei3 (Port B0) according to Table 7. Bit 5:4 = IS2[1:0] ei2 sensitivity These bits define the interrupt sensitivity for ei2 (Port B3) according to Table 7. Bit 3:2 = IS1[1:0] ei1 sensitivity These bits define the interrupt sensitivity for ei1 (Port A7) according to Table 7. Bit 1:0 = IS0[1:0] ei0 sensitivity These bits define the interrupt sensitivity for ei0 (Port A0) according to Table 7. Notes: 1. These 8 bits can be written only when the I bit in the CC register is set. 2. Changing the sensitivity of a particular external interrupt clears this pending interrupt. This can be used to clear unwanted pending interrupts. Refer to section “External interrupt function” on page 43. Table 7. Interrupt Sensitivity Bits 70 IS31 IS30 IS21 IS20 IS11 IS10 IS01 IS00 ISx1 ISx0 External Interrupt Sensitivity 0 0 Falling edge & low level 0 1 Rising edge only 1 0 Falling edge only 1 1 Rising and falling edge 1 |
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