MC68HC908LJ24 Datasheet, PDF (403/464 Pages) Motorola, Inc – Microcontrollers

RESET
ACK
VECTOR
FETCH
DECODER
V_DD
INTERNAL
PULLUP
DEVICE
IRQ
V_DD
D ^CLR Q
CK
SYNCHRONIZER
IMASK
MODE
HIGH
VOLTAGE
DETECT
Figure 19-1. IRQ Module Block Diagram
External Interrupt (IRQ)
Functional Description
TO CPU FOR
BIL/BIH
INSTRUCTIONS
IRQF
IRQ
INTERRUPT
REQUEST
TO MODE
SELECT
LOGIC
Addr.
$001E
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
IRQ Status and Control ^{Read: 0}
0
0
0
IRQF
0
IMASK MODE
Register Write:
ACK
(INTSCR) _{Reset: 0}
0
0
0
0
0
0
0
= Unimplemented
Figure 19-2. IRQ I/O Port Register Summary
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
External Interrupt (IRQ)
Data Sheet
403