MC68HC05P18A Datasheet, PDF (29/130 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Memory Map
I/O and Control Registers
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
Register Name
Bit 7
6
5
Read:
Port A Data Register
PA7
PA6
PA5
(PORTA) Write:
See page 56.
Reset:
Read:
Port B Data Register
PB7 PB6 PB5
(PORTB) Write:
See page 57.
Reset:
Read:
Port C Data Register
PC7 PC6 PC5
(PORTC) Write:
See page 58.
Reset:
Read: PD7
0
Port D Data Register
PD5
(PORTD) Write:
See page 59.
Reset:
Read:
Port A Data Direction
DDRA7
(DDRA) Write:
See page 56.
Reset: 0
DDRA6
0
DDRA5
0
Read:
Port B Data Direction
DDRB7
(DDRB) Write:
See page 57.
Reset: 0
DDRB6
0
DDRB5
0
Read:
Port C Data Direction
DDRC7
(DDRC) Write:
See page 58.
Reset: 0
DDRC6
0
DDRC5
0
Read: 0
Port D Data Direction
(DDRD) Write:
See page 59.
Reset: 0
0
DDRD5
0
0
Unimplemented
4
3
PA4
PA3
Unaffected by reset
0
0
Unaffected by reset
PC4
PC3
Unaffected by reset
1
0
Unaffected by reset
DDRA4 DDRA3
0
0
1
1
0
0
DDRC4 DDRC3
0
0
0
0
0
0
2
1
Bit 0
PA2
PA1
PA0
0
0
0
PC2 PC1 PC0
0
0
0
DDRA2 DDRA1 DDRA0
0
0
0
1
1
1
0
0
0
DDRC2 DDRC1 DDRC0
0
0
0
0
0
0
0
0
0
= Unimplemented
R = Reserved
Figure 2-3. I/O and Control Registers (Sheet 1 of 4)
U = Unaffected
MC68HC05P18A
Memory Map
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Technical Data