MC68HC08BD24 Datasheet, PDF (35/244 Pages) Motorola, Inc – HCMOS Microcontroller Unit

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: 0
Port D Data Register
(PTD)
Write:
Reset:
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: 0
$0007
Data Direction Register D
(DDRD)
Write:
Reset: 0
$0008
Read: 0
Port E Data Register
(PTE)
Write:
Reset:
Read: 0
$0009
Data Direction Register E
(DDRE)
Write:
Reset: 0
6
PTA6
5
PTA5
PTB6 PTB5
0
PTC5
PTD6 PTD5
DDRA6 DDRA5
0
0
DDRB6 DDRB5
0
0
0
DDRC5
0
0
DDRD6 DDRD5
0
0
0
0
0
0
0
0
= Unimplemented
4
3
2
1
PTA4 PTA3 PTA2 PTA1
Unaffected by reset
PTB4 PTB3 PTB2 PTB1
Unaffected by reset
PTC4 PTC3 PTC2 PTC1
Unaffected by reset
PTD4 PTD3 PTD2 PTD1
Unaffected by reset
DDRA4 DDRA3 DDRA2 DDRA1
0
0
0
0
DDRB4 DDRB3 DDRB2 DDRB1
0
0
0
0
DDRC4 DDRC3 DDRC2 DDRC1
0
0
0
0
DDRD4 DDRD3 DDRD2 DDRD1
0
0
0
0
0
0
PTE2 PTE1
Unaffected by reset
0
0
DDRE2
DDRE1
0
0
0
0
R = Reserved
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
DDRB0
0
DDRC0
0
DDRD0
0
PTE0
DDRE0
0
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 12)
MC68HC08BD24 — Rev. 1.1
Freescale Semiconductor
Technical Data
35