MC68HC05P9A Datasheet, PDF (69/158 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Parallel I/O Ports
Port A
PORT A EXTERNAL INTERRUPT
MASK OPTION
READ $0004
WRITE $0004
RESET
DATA DIRECTION
REGISTER A
BIT DDRA7
WRITE $0000
PORT A DATA
REGISTER
BIT PA7
READ $0000
V_DD
V_DD
DISABLED
ENABLED
PAX
SOFTWARE CONTROLLED OPTION
EDGE AND LEVEL
EDGE ONLY
FROM OTHER
PORT A PINS
IRQ
RESET
EXTERNAL INTERRUPT VECTOR FETCH
V_DD
DQ
CQ
R
I BIT
(FROM CCR)
Figure 31. Port A I/O Logic
EXTERNAL
INTERRUPT
REQUEST
9-mc68hc05p9a
MOTOROLA
Parallel I/O Ports
69
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