MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 384

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

External Interrupt (IRQ)
19.6.1 IRQ1 Status and Control Register
Data Sheet
384
Address:
The IRQ1 status and control register (INTSCR1) controls and monitors
operation of IRQ1. The INTSCR1 has the following functions:
IRQ1F — IRQ1 Flag Bit
ACK1 — IRQ1 Interrupt Request Acknowledge Bit
IMASK1 — IRQ1 Interrupt Mask Bit
MODE1 — IRQ1 Edge/Level Select Bit
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
•
•
•
•
This read-only status bit is high when the IRQ1 interrupt is pending.
Writing a logic 1 to this write-only bit clears the IRQ1 latch. ACK1
always reads as logic 0. Reset clears ACK1.
Writing a logic 1 to this read/write bit disables IRQ1 interrupt requests.
Reset clears IMASK1.
This read/write bit controls the triggering sensitivity of the IRQ1 pin.
Reset clears MODE1.
Figure 19-4. IRQ1 Status and Control Register (INTSCR1)
For More Information On This Product,
1 = IRQ1 interrupt pending
0 = IRQ1 interrupt not pending
1 = IRQ1 interrupt requests disabled
0 = IRQ1 interrupt requests enabled
1 = IRQ1 interrupt requests on falling edges and low levels
0 = IRQ1 interrupt requests on falling edges only
Shows the state of the IRQ1 flag
Clears the IRQ1 latch
Masks IRQ1 interrupt request
Controls triggering sensitivity of the IRQ1 interrupt pin
$001E
Bit 7
0
0
Go to: www.freescale.com
= Unimplemented
6
0
0
5
0
0
4
0
0
IRQ1F
MC68HC908AP Family — Rev. 2.5
3
0
ACK1
2
0
0
IMASK1
1
0
MOTOROLA
MODE1
Bit 0
0