MC68HC908LJ12 Datasheet, PDF (358/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

External Interrupt (IRQ)
RESET
ACK
VECTOR
FETCH
DECODER
V_DD
INTERNAL
PULLUP
DEVICE
IRQ
V_DD
D ^CLR Q
CK
SYNCHRONIZER
IMASK
MODE
HIGH
VOLTAGE
DETECT
Figure 18-1. IRQ Module Block Diagram
TO CPU FOR
BIL/BIH
INSTRUCTIONS
IRQF
IRQ
INTERRUPT
REQUEST
TO MODE
SELECT
LOGIC
Addr.
$001E
Register Name
Bit 7
6
5
4
3
IRQ Status and Control ^{Read: 0}
0
0
0
IRQF
Register Write:
(INTSCR) _{Reset: 0}
0
0
0
0
= Unimplemented
Table 18-1. IRQ I/O Port Register Summary
2
1
Bit 0
0
IMASK MODE
ACK
0
0
0
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor
External Interrupt (IRQ)
Technical Data
359