MC68HC908GR8 Datasheet, PDF (144/286 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Input/Output Ports (I/O)
Addr.
$0005
$0006
$0007
$0008
$000C
$000D
$000E
$000F
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
Data Direction Register B
(DDRB)
Write:
Reset: 0
0
DDRB5 DDRB4 DDRB3 DDRB2 DDRB1 DDRB0
0
0
0
0
0
0
0
Read: 0
0
0
0
0
0
Data Direction Register C
(DDRC)
Write:
DDRC1 DDRC0
Reset: 0
0
0
0
0
0
0
0
Read: 0
Data Direction Register D
(DDRD)
Write:
Reset: 0
DDRD6 DDRD5 DDRD4 DDRD3 DDRD2 DDRD1 DDRD0
0
0
0
0
0
0
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: 0
0
0
0
Port A Input Pullup Enable
Register (PTAPUE)
Write:
PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
Reset: 0
0
0
0
0
0
0
0
Read: 0
0
0
0
0
0
Port C Input Pullup Enable
Register (PTCPUE)
Write:
PTCPUE1 PTCPUE0
Reset: 0
0
0
0
0
0
0
0
Read: 0
Port D Input Pullup Enable
Register (PTDPUE)
Write:
Reset: 0
PTDPUE6 PTDPUE5 PTDPUE4 PTDPUE3 PTDPUE2 PTDPUE1 PTDPUE0
0
0
0
0
0
0
0
= Unimplemented
Figure 16-1. I/O Port Register Summary (Continued)
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
144
Freescale Semiconductor