MC68HC05P9A Datasheet, PDF (21/158 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Memory
Input/Output Register Summary
Input/Output Register Summary
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
Name
R/W Bit 7 6
Read:
Port A Data Register (PORTA)
PA7 PA6
Write:
Reset:
5
4
3
2
PA5 PA4 PA3 PA2
Unaffected by reset
1 Bit 0
PA1 PA0
Read:
0
0
0
0
0
Port B Data Register (PORTB)
PB7 PB6 PB5
Write:
Reset:
Unaffected by reset
Read:
Port C Data Register (PORTC)
PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
Write:
Reset:
Unaffected by reset
Read:
0
1
0
0
0
0
Port D Data Register (PORTD)
PD7
PD5
Write:
Reset:
Unaffected by reset
Read:
Data Direction Register A (DDRA)
DDRA7 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0
Write:
Reset: 0
0
0
0
0
0
0
0
Read:
0
0
0
0
0
Data Direction Register B (DDRB)
DDRB7 DDRB6 DDRB5
Write:
Reset: 0
0
0
0
0
0
0
0
Read:
Data Direction Register C (DDRC)
DDRC7 DDRC6 DDRC5 DDRC4 DDRC3 DDRC2 DDRC1 DDRC0
Write:
Reset: 0
0
0
0
0
0
0
0
Read: 0
0
0
0
0
0
0
Data Direction Register D (DDRD)
DDRD5
Write:
Reset: 0
0
0
0
0
0
0
0
Unimplemented
Unimplemented
= Unimplemented
R = Reserved
Figure 9. I/O Register Summary
U = Unaffected
7-mc68hc05p9a
MOTOROLA
Memory
21
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