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MC68HC908GR8A Datasheet(PDF) 98 Page - Freescale Semiconductor, Inc |
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MC68HC908GR8A Datasheet(HTML) 98 Page - Freescale Semiconductor, Inc |
98 / 260 page External Interrupt (IRQ) MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5 98 Freescale Semiconductor 8.6 IRQ Status and Control Register The IRQ status and control register (INTSCR) controls and monitors operation of the IRQ module. The INTSCR: • Shows the state of the IRQ flag • Clears the IRQ latch • Masks IRQ interrupt request • Controls triggering sensitivity of the IRQ interrupt pin IRQF — IRQ Flag Bit This read-only status bit is high when the IRQ interrupt is pending. 1 = IRQ interrupt pending 0 = IRQ interrupt not pending ACK — IRQ Interrupt Request Acknowledge Bit Writing a 1 to this write-only bit clears the IRQ latch. ACK always reads as 0. Reset clears ACK. IMASK — IRQ Interrupt Mask Bit Writing a 1 to this read/write bit disables IRQ interrupt requests. Reset clears IMASK. 1 = IRQ interrupt requests disabled 0 = IRQ interrupt requests enabled MODE — IRQ Edge/Level Select Bit This read/write bit controls the triggering sensitivity of the IRQ pin. Reset clears MODE. 1 = IRQ interrupt requests on falling edges and low levels 0 = IRQ interrupt requests on falling edges only Address: $001D Bit 7 654321 Bit 0 Read: 0000 IRQF 0 IMASK MODE Write: ACK Reset: 00000000 = Unimplemented Figure 8-3. IRQ Status and Control Register (INTSCR) |
Número de pieza similar - MC68HC908GR8A_07 |
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Descripción similar - MC68HC908GR8A_07 |
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