MC908GR8CDWE Datasheet, PDF (206/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Input/Output Ports (I/O)
Addr. Register Name
Bit 7
6
5
4
3
Read: 0
0
0
0
$0000
Port A Data Register
(PTA)
Write:
PTA3
Reset:
Unaffected by reset
$0001
Read: 0
Port B Data Register
(PTB)
Write:
Reset:
0
PTB5 PTB4 PTB3
Unaffected by reset
Read: 0
0
0
0
0
$0002
Port C Data Register
(PTC)
Write:
Reset:
Unaffected by reset
$0003
Read: 0
Port D Data Register
(PTD)
Write:
Reset:
PTD6 PTD5 PTD4 PTD3
Unaffected by reset
Read: 0
0
0
0
$0004
Data Direction Register A
(DDRA)
Write:
DDRA3
Reset: 0
0
0
0
0
Read: 0
$0005
Data Direction Register B
(DDRB)
Write:
Reset: 0
0
DDRB5 DDRB4 DDRB3
0
0
0
0
Read: 0
0
0
0
0
$0006
Data Direction Register C
(DDRC)
Write:
Reset: 0
0
0
0
0
Read: 0
$0007
Data Direction Register D
(DDRD)
Write:
Reset: 0
DDRD6 DDRD5 DDRD4 DDRD3
0
0
0
0
= Unimplemented
Figure 16-1. I/O Port Register Summary
2
PTA2
PTB2
0
PTD2
DDRA2
0
DDRB2
0
0
0
DDRD2
0
1
PTA1
PTB1
PTC1
PTD1
DDRA1
0
DDRB1
0
DDRC1
0
DDRD1
0
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
DDRB0
0
DDRC0
0
DDRD0
0
Technical Data
206
MC68HC908GR8 — Rev 4.0
Input/Output Ports (I/O)
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