MC68HC705P9 Datasheet, PDF (82/160 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Parallel Input/Output (I/O) Ports
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
Name:
R/W Bit 7 6
5
4
3
2
1 Bit 0
Read:
Port A Data Register
PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0
(PORTA) Write:
See page 83.
Reset:
Unaffected by reset
Read:
0
0
0
0
0
Port B Data Register
PB7 PB6 PB5
(PORTB) Write:
See page 85.
Reset:
Unaffected by reset
Read:
Port C Data Register
PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
(PORTC) Write:
See page 88.
Reset:
Unaffected by reset
Read:
0
1
0
0
0
0
Port D Data Register
PD7
PD5
(PORTD) Write:
See page 91.
Reset:
Unaffected by reset
Read:
Data Direction Register A
DDRA7
(DDRA) Write:
See page 83.
Reset: 0
DDRA6
0
DDRA5
0
DDRA4
0
DDRA3
0
DDRA2
0
DDRA1
0
DDRA0
0
Read:
0
0
0
0
0
Data Direction Register B
DDRB7 DDRB6 DDRB5
(DDRB) Write:
See page 86.
Reset: 0
0
0
0
0
0
0
0
Read:
Data Direction Register C
DDRC7
(DDRC) Write:
See page 89.
Reset: 0
DDRC6
0
DDRC5
0
DDRC4
0
DDRC3
0
DDRC2
0
DDRC1
0
DDRC0
0
Read: 0
0
0
0
0
0
0
Data Direction Register D
DDRD5
(DDRD) Write:
See page 92.
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 7-1. Parallel I/O Port Register Summary
Technical Data
82
Parallel Input/Output (I/O) Ports
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Go to: www.freescale.com
MC68HC705P9 — Rev. 4.0
MOTOROLA