MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 176

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

External Interrupt (IRQ)
176
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
Address: $001D
IRQF1 — IRQ Flag
ACK1 — IRQ Interrupt Request Acknowledge Bit
IMASK1 — IRQ Interrupt Mask Bit
MODE1 — IRQ Edge/Level Select Bit
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. 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.
This read/write bit controls the triggering sensitivity of the IRQ pin.
Reset clears MODE1.
Figure 13-3. IRQ Status and Control Register (INTSCR)
1 = IRQ interrupt pending
0 = IRQ interrupt not pending
1 = IRQ interrupt requests disabled
0 = IRQ interrupt requests enabled
1 = IRQ interrupt requests on falling edges and low levels
0 = IRQ interrupt requests on falling edges only
Bit 7
0
0
External Interrupt (IRQ)
= Unimplemented
6
0
0
5
0
0
4
0
0
IRQF1
3
0
ACK1
2
0
IMASK1
1
0
MOTOROLA
MODE1
Bit 0
0