MC68HC908GP32 Datasheet, PDF (179/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
External Interrupt (IRQ)
Functional Description
NOTE: The interrupt mask (I) in the condition code register (CCR) masks all
interrupt requests, including external interrupt requests.
RESET
ACK
VECTOR
FETCH
DECODER
V_DD
INTERNAL
PULLUP
DEVICE
IRQ
V_DD
CLR
D
Q
CK
SYNCHRONIZER
IMASK
TO CPU FOR
BIL/BIH
INSTRUCTIONS
IRQF
IRQ
INTERRUPT
REQUEST
MODE
HIGH
VOLTAGE
DETECT
Figure 12-1. IRQ Module Block Diagram
TO MODE
SELECT
LOGIC
Addr.
$001D
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
Figure 12-2. IRQ I/O Register Summary
2
1
Bit 0
0
IMASK MODE
ACK
0
0
0
MC68HC908GP32•MC68HC08GP32 — Rev. 6
MOTOROLA
External Interrupt (IRQ)
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Technical Data
177