MC68HC908LD64 Datasheet, PDF (317/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

External Interrupt (IRQ)
Functional Description
NOTE:
The interrupt mask (I) in the condition code register (CCR) masks all
interrupt requests, including external interrupt requests. (See 9.6
Exception Control.)
ACK
RESET
VECTOR
FETCH
DECODER
V_DD
INTERNAL
PULL-UP
DEVICE
IRQ
V_DD
D ^CLR Q
CK
IRQ
FF
SYNCHRO-
NIZER
IMASK
TO CPU FOR
BIL/BIH
INSTRUCTIONS
IRQF
IRQ
INTERRUPT
REQUEST
MODE
HIGH
VOLTAGE
DETECT
Figure 20-1. IRQ Module Block Diagram
TO MODE
SELECT
LOGIC
Addr. Register Name
Bit 7
6
5
IRQ Status and Control ^{Read: 0}
0
0
$001E
Register Write:
(INTSCR) _{Reset: 0}
0
0
= Unimplemented
4
3
0
IRQF
0
0
Figure 20-2. IRQ I/O Register Summary
2
1
Bit 0
0
IMASK MODE
ACK
0
0
0
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
External Interrupt (IRQ)
Data Sheet
317