MC68HC08AS20 Datasheet, PDF (43/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
$000A
Register Name
Bit 7
6
Read:
Port A Data Register
(PTA)
Write:
Reset:
PTA7
PTA6
Read:
Port B Data Register
(PTB)
Write:
Reset:
PTB7
PTB6
Read: 0
0
Port C Data Register
(PTC)
Write:
Reset:
Read: 0
Port D Data Register
(PTD)
Write:
R
Reset:
PTD6
Read:
Data Direction Register A
(DDRA)
Write:
Reset:
DDRA7
DDRA6
Read:
Data Direction Register B
(DDRB)
Write:
Reset:
DDRB7
0
DDRB6
0
Data Direction Register C
(DDRC)
Read:
Write:
MCLKEN
0
Reset: 0
0
Read: 0
Data Direction Register D
(DDRD)
Write:
0
Reset: 0
DDRD6
0
Read:
Port E Data Register
(PTE)
Write:
Reset:
PTE7
PTE6
Read: 0
0
Port F Data Register
(PTF)
Write:
Reset:
5
PTA5
PTB5
0
PTD5
DDRA5
DDRB5
0
0
0
DDRD5
0
PTE5
0
4
3
PTA4 PTA3
Unaffected by Reset
PTB4 PTB3
Unaffected by Reset
PTC4 PTC3
Unaffected by Reset
PTD4 PTD3
Unaffected by Reset
DDRA4 DDRA3
Unaffected by Reset
DDRB4 DDRB3
0
0
DDRC4 DDRC3
0
0
DDRD4 DDRD3
0
0
PTE4 PTE3
Unaffected by Reset
0
PTF3
Unaffected by Reset
2
PTA2
PTB2
PTC2
PTD2
DDRA2
DDRB2
0
DDRC2
0
DDR2
0
PTE2
PTF2
1
PTA1
PTB1
PTC1
PTD1
DDRA1
DDRB1
0
DDRC1
0
DDRD1
0
PTE1
PTF1
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
DDRB0
0
DDRC0
0
DDRD0
0
PTE0
PTF0
= Unimplemented
R = Reserved
U = Unaffected
X = Indeterminate
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 7)
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
Advance Information
43