MC68HC908GP20 Datasheet, PDF (47/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Addr. Register Name
Bit 7
$0000
Read:
Port A Data Register
(PTA)
Write:
Reset:
PTA7
$0001
Read:
Port B Data Register
(PTB)
Write:
Reset:
PTB7
$0002
Read: 0
Port C Data Register
(PTC)
Write:
Reset:
$0003
Read:
Port D Data Register
(PTD)
Write:
Reset:
PTD7
Read:
$0004
Data Direction Register A
(DDRA)
Write:
Reset:
DDRA7
0
Read:
$0005
Data Direction Register B
(DDRB)
Write:
Reset:
DDRB7
0
Read: 0
$0006
Data Direction Register C
(DDRC)
Write:
Reset: 0
Read:
$0007
Data Direction Register D
(DDRD)
Write:
Reset:
DDRD7
0
$0008
Read: 0
Port E Data Register
(PTE)
Write:
Reset:
Read:
$0009
Unimplemented Write:
Reset: 0
6
5
4
3
2
1
PTA6 PTA5 PTA4 PTA3 PTA2 PTA1
Unaffected by reset
PTB6 PTB5 PTB4 PTB3 PTB2 PTB1
Unaffected by reset
PTC6 PTC5 PTC4 PTC3 PTC2 PTC1
Unaffected by reset
PTD6 PTD5 PTD4 PTD3 PTD2 PTD1
Unaffected by reset
DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1
0
0
0
0
0
0
DDRB6 DDRB5 DDRB4 DDRB3 DDRB2 DDRB1
0
0
0
0
0
0
DDRC6 DDRC5 DDRC4 DDRC3 DDRC2 DDRC1
0
0
0
0
0
0
DDRD6 DDRD5 DDRD4 DDRD3 DDRD2 DDRD1
0
0
0
0
0
0
0
0
0
0
0
PTE1
Unaffected by reset
0
0
= Unimplemented
0
0
R = Reserved
0
0
U = Unaffected
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
DDRB0
0
DDRC0
0
DDRD0
0
PTE0
0
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 8)
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
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