mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 171

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

IRQ Status and Control Register
7-irq
MOTOROLA
Address:
The IRQ status and control register (ISCR) controls and monitors
operation of the IRQ module. The ISCR has these functions:
IRQF — IRQ Flag Bit
ACK1 — IRQ Interrupt Request Acknowledge Bit
IMASK1 — IRQ Interrupt Mask Bit
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
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This read-only status bit is high when the IRQ interrupt is pending.
Writing a logic 1 to this write-only bit clears the IRQ latch. ACK1
always reads as logic 0. Reset clears ACK1.
Writing a logic 1 to this read/write bit disables IRQ interrupt requests.
Reset clears IMASK1.
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1 = IRQ interrupt pending
0 = IRQ interrupt not pending
1 = IRQ interrupt requests disabled
0 = IRQ interrupt requests enabled
Shows the state of the IRQ interrupt flag
Clears the IRQ interrupt latch
Masks IRQ interrupt request
Controls triggering sensitivity of the IRQ interrupt pin
$001A
Figure 3. IRQ Status and Control Register (ISCR)
Bit 7
R
R
0
0
External Interrupt Module (IRQ)
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= Reserved
R
6
0
0
R
5
0
0
R
4
0
0
IRQF
R
3
0
IRQ Status and Control Register
External Interrupt Module (IRQ)
MC68HC08AZ60 — Rev 1.0
ACK1
2
0
0
IMASK1
1
0
MODE1
Bit 0
0
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