MC68HC908GP32_08 Datasheet, PDF (116/266 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Input/Output (I/O) Ports
Addr.
$0004
$0005
$0006
$0007
$0008
$000C
$000D
$000E
$000F
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Data Direction Register A
(DDRA)
Write:
Reset:
DDRA7
0
DDRA6
0
DDRA5
0
DDRA4
0
DDRA3
0
DDRA2
0
DDRA1
0
DDRA0
0
Read:
Data Direction Register B
(DDRB)
Write:
Reset:
DDRB7
0
DDRB6
0
DDRB5
0
DDRB4
0
DDRB3
0
DDRB2
0
DDRB1
0
DDRB0
0
Read: 0
Data Direction Register C
(DDRC)
Write:
Reset: 0
DDRC6 DDRC5 DDRC4 DDRC3 DDRC2 DDRC1 DDRC0
0
0
0
0
0
0
0
Read:
Data Direction Register D
(DDRD)
Write:
Reset:
DDRD7
0
DDRD6
0
DDRD5
0
DDRD4
0
DDRD3
0
DDRD2
0
DDRD1
0
DDRD0
0
Read: 0
0
0
0
0
0
Port E Data Register
(PTE)
Write:
PTE1
PTE0
Reset:
Unaffected by reset
Read: 0
0
0
0
0
0
Data Direction Register E
(DDRE)
Write:
DDRE1 DDRE0
Reset: 0
0
0
0
0
0
0
0
Read:
Port A Input Pullup Enable
PTAPUE7
Register Write:
(PTAPUE) _Reset:
0
PTAPUE6
0
PTAPUE5
0
PTAPUE4
0
PTAPUE3
0
PTAPUE2
0
PTAPUE1
0
PTAPUE0
0
Port C Input Pullup Enable ^Read:
0
Register Write:
(PTCPUE) _Reset:
0
PTCPUE6 PTCPUE5 PTCPUE4 PTCPUE3 PTCPUE2 PTCPUE1 PTCPUE0
0
0
0
0
0
0
0
Port D Input Pullup Enable ^Read: _PTDPUE7
Register Write:
(PTDPUE)
Reset: 0
PTDPUE6
0
PTDPUE5
0
PTDPUE4
0
PTDPUE3
0
PTDPUE2
0
PTDPUE1
0
PTDPUE0
0
= Unimplemented
Figure 12-1. I/O Port Register Summary (Continued)
MC68HC908GP32 Data Sheet, Rev. 10
116
Freescale Semiconductor