MC68HC908GP32_08 Datasheet, PDF (31/266 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Input/Output (I/O) Section
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
$000A
$000B
$000C
$000D
Register Name
Bit 7
Read:
Port A Data Register
(PTA)
Write:
Reset:
PTA7
Read:
Port B Data Register
(PTB)
Write:
Reset:
PTB7
Read: 0
Port C Data Register
(PTC)
Write:
Reset:
Read:
Port D Data Register
(PTD)
Write:
Reset:
PTD7
Read:
Data Direction Register A
(DDRA)
Write:
Reset:
DDRA7
0
Read:
Data Direction Register B
(DDRB)
Write:
Reset:
DDRB7
0
Read: 0
Data Direction Register C
(DDRC)
Write:
Reset: 0
Read:
Data Direction Register D
(DDRD)
Write:
Reset:
DDRD7
0
Read: 0
Port E Data Register
(PTE)
Write:
Reset:
Read:
Unimplemented Write:
Reset: 0
Read:
Unimplemented Write:
Reset: 0
Read:
Unimplemented Write:
Reset: 0
Read: 0
Data Direction Register E
(DDRE)
Write:
Reset: 0
Port A Input Pullup Enable ^Read: _PTAPUE7
Register Write:
(PTAPUE) _{Reset: 0}
6
PTA6
PTB6
PTC6
PTD6
DDRA6
0
DDRB6
0
DDRC6
0
DDRD6
0
0
5
PTA5
PTB5
PTC5
PTD5
DDRA5
0
DDRB5
0
DDRC5
0
DDRD5
0
0
4
3
PTA4
PTA3
Unaffected by reset
PTB4
PTB3
Unaffected by reset
PTC4
PTC3
Unaffected by reset
PTD4
PTD3
Unaffected by reset
DDRA4 DDRA3
0
0
DDRB4 DDRB3
0
0
DDRC4 DDRC3
0
0
DDRD4 DDRD3
0
0
0
0
Unaffected by reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
PTAPUE6 PTAPUE5 PTAPUE4 PTAPUE3
0
0
= Unimplemented
0
0
R = Reserved
2
PTA2
1
PTA1
PTB2
PTB1
PTC2
PTC1
PTD2
PTD1
DDRA2
0
DDRB2
0
DDRC2
0
DDRD2
0
0
DDRA1
0
DDRB1
0
DDRC1
0
DDRD1
0
PTE1
0
0
0
0
0
0
0
DDRE1
0
0
PTAPUE2 PTAPUE1
0
0
U = Unaffected
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
DDRB0
0
DDRC0
0
DDRD0
0
PTE0
0
0
0
DDRE0
0
PTAPUE0
0
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 6)
MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor
31