MC908AB32CFUE Datasheet, PDF (341/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

External Interrupt (IRQ)
NOTE:
The interrupt mask (I) in the condition code register (CCR) masks all
interrupt requests, including external interrupt requests. (See 8.6
Exception Control.)
ACK
RESET
VECTOR
FETCH
DECODER
V_DD
INTERNAL
PULLUP
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 18-1. IRQ Module Block Diagram
TO MODE
SELECT
LOGIC
Addr.
Register Name
Bit 7
6
5
IRQ Status and Control ^{Read: 0}
0
0
$001A
Register Write:
(ISCR) _{Reset: 0}
0
0
= Unimplemented
4
3
0
IRQF
0
0
Figure 18-2. IRQ I/O Register Summary
2
1
Bit 0
0
IMASK MODE
ACK
0
0
0
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
External Interrupt (IRQ)
Technical Data
341