MC68HC08JK1 Datasheet, PDF (138/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

I/O Ports
Freescale Semiconductor, Inc.
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
Unaffected by reset
PTA1
PTA0
$0001
Read:
Port B Data Register
(PTB)
Write:
Reset:
PTB7
PTB6
PTB5 PTB4 PTB3 PTB2
Unaffected by reset
PTB1
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
Port A Input Pull-up ^Read:
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
12.3 Port A
Port A is an 7-bit special function port that shares all seven of its pins
with the Keyboard Interrupt (KBI) Module, See Section 14. Each port A
pin also has software configurable pull-up device if the corresponding
port pin is configured as input port. PTA0 to PTA5 has direct LED drive
capability.
Technical Data
138
I/O Ports
For More Information On This Product,
Go to: www.freescale.com
MC68H(R)C08JL3 — Rev. 4
MOTOROLA