MC908JL16CFAE FREESCALE [Freescale Semiconductor, Inc], MC908JL16CFAE Datasheet - Page 154

• Manufacturer Part Number: MC908JL16CFAE
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

External Interrupt (IRQ)
11.5 IRQ Status and Control Register (INTSCR)
The IRQ status and control register (INTSCR) controls and monitors operation of the IRQ module. The
INTSCR has the following functions:
IRQF — IRQ Flag Bit
ACK — IRQ Interrupt Request Acknowledge Bit
IMASK — IRQ Interrupt Mask Bit
MODE — IRQ Edge/Level Select Bit
IRQPUD — IRQ Pin Pull-Up Disable Bit
154
•
•
•
•
This read-only status bit is high when the IRQ interrupt is pending.
Writing a logic one to this write-only bit clears the IRQ latch. ACK always reads as logic zero. Reset
clears ACK.
Writing a logic one to this read/write bit disables IRQ interrupt requests. Reset clears IMASK.
This read/write bit controls the triggering sensitivity of the IRQ pin. Reset clears MODE.
IRQPUD disconnects the internal pull-up on the IRQ pin.
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
1 = Internal pull-up is disconnected
0 = Internal pull-up is connected between IRQ pin and V
Shows the state of the IRQ flag
Clears the IRQ latch
Masks IRQ and interrupt request
Controls triggering sensitivity of the IRQ interrupt pin
Address: $001D
Address: $001E
Reset:
Reset:
Read:
Read:
Write:
Write:
POR:
IRQPUD
Figure 11-3. IRQ Status and Control Register (INTSCR)
Bit 7
Bit 7
R
0
0
0
0
Figure 11-4. Configuration Register 2 (CONFIG2)
= Unimplemented
= Reserved
R
6
0
0
6
0
0
MC68HC908JL16 Data Sheet, Rev. 1.1
R
5
0
0
5
0
0
U = Unaffected
LVIT1
U
4
0
0
4
0
LVIT0
IRQF
U
3
0
3
0
DD
ACK
R
2
0
2
0
0
IMASK
R
1
0
1
0
0
Freescale Semiconductor
MODE
Bit 0
Bit 0
R
0
0
0