Freescale Semiconductor MC68HC08KH12 User Manual

Page 218

Advance Information

MC68HC(7)08KH12

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Rev. 1.1

218

Freescale Semiconductor

IRQF1 — IRQ1 Flag

This read-only status bit is high when the IRQ1 interrupt is pending.

1 = IRQ1 interrupt pending
0 = IRQ1 interrupt not pending

ACK1 — IRQ1 Interrupt Request Acknowledge Bit

Writing a logic one to this write-only bit clears the IRQ1 latch. ACK1
always reads as logic zero. Reset clears ACK1.

IMASK1 — IRQ1 Interrupt Mask Bit

Writing a logic one to this read/write bit disables IRQ1 interrupt
requests. Reset clears IMASK1.

1 = IRQ1 interrupt requests disabled
0 = IRQ1 interrupt requests enabled

MODE1 — IRQ1 Edge/Level Select Bit

This read/write bit controls the triggering sensitivity of the IRQ1/V

pin. Reset clears MODE1.

1 = IRQ1/V

interrupt requests on falling edges and low levels

0 = IRQ1/V

interrupt requests on falling edges only