MC68HC908JL3E Datasheet, PDF (154/226 Pages) Motorola, Inc – Microcontrollers

Input/Output (I/O) Ports
Addr.
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
$0000
Read: 0
Port A Data Register
(PTA)
Write:
Reset:
PTA6 PTA5 PTA4 PTA3 PTA2 PTA1 PTA0
Unaffected by reset
$0001
Read:
Port B Data Register
(PTB)
Write:
Reset:
PTB7
PTB6 PTB5 PTB4 PTB3 PTB2 PTB1
Unaffected by reset
PTB0
$0003
Read:
Port D Data Register
(PTD)
Write:
Reset:
PTD7
PTD6
PTD5 PTD4 PTD3 PTD2
Unaffected by reset
PTD1
PTD0
Read: 0
$0004
Data Direction Register A
(DDRA)
Write:
Reset: 0
DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0
0
0
0
0
0
0
0
Read:
$0005
Data Direction Register B
(DDRB)
Write:
Reset:
DDRB7
0
DDRB6
0
DDRB5
0
DDRB4
0
DDRB3
0
DDRB2
0
DDRB1
0
DDRB0
0
Read:
$0007
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
$000A
Port D Control Register
(PDCR)
Write:
SLOWD7 SLOWD6 PTDPU7 PTDPU6
Reset: 0
0
0
0
0
0
0
0
$000D
Read:
Port A Input Pull-up
Enable Register Write:
(PTAPUE)
Reset:
PTA6EN
0
PTAPUE6 PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
0
0
0
0
0
0
0
Figure 12-1. I/O Port Register Summary
Technical Data
154
MC68H(R)C908JL3E/JK3E/JK1E — Rev. 2.0
Input/Output (I/O) Ports
MOTOROLA