MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 183

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MC68HC708AS48
MOTOROLA
—
Rev. 4.0
Address:
IRQF — IRQ/V
ACK — IRQ Interrupt Request Acknowledge Bit
IMASK —IRQ/V
MODE — IRQ/V
Reset:
Read:
Write:
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. ACK always
reads as logic 0. Reset clears ACK.
Writing a logic 1 to this read/write bit disables IRQ/V
requests. Reset clears IMASK.
This read/write bit controls the triggering sensitivity of the IRQ/V
pin. Reset clears MODE.
1 = IRQ/V
0 = IRQ/V
1 = IRQ/V
0 = IRQ/V
1 = IRQ/V
0 = IRQ/V
Figure 14-4. IRQ Status and Control Register (ISCR)
$001A
Bit 7
R
R
0
0
PP
= Reserved
PP
PP
PP
PP
PP
PP
PP
PP
External Interrupt
R
6
0
0
Flag Bit
interrupt pending
interrupt not pending
interrupt requests disabled
interrupt requests enabled
interrupt requests on falling edges and low levels
interrupt requests on falling edges only
Interrupt Mask Bit
Edge/Level Select Bit
R
5
0
0
R
4
0
0
IRQF
R
3
0
IRQ Status and Control Register
ACK
2
0
0
Advance Information
PP
IMASK
External Interrupt
interrupt
1
0
MODE
Bit 0
PP
0
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