MC908JL3ECPE Datasheet, PDF (23/180 Pages) Freescale Semiconductor, Inc – Microcontrollers

Monitor ROM
Addr.
$0000
$0001
$0002
Register Name
Read:
Port A Data Register
(PTA)
Write:
Reset:
Read:
Port B Data Register
(PTB)
Write:
Reset:
Read:
Unimplemented Write:
Bit 7
0
PTB7
6
PTA6
PTB6
5
PTA5
PTB5
4
3
PTA4
PTA3
Unaffected by reset
PTB4
PTB3
Unaffected by reset
2
PTA2
PTB2
1
PTA1
PTB1
Bit 0
PTA0
PTB0
$0003
$0004
$0005
$0006
Read:
Port D Data Register
(PTD)
Write:
Reset:
Read:
Data Direction Register A
(DDRA)
Write:
Reset:
Read:
Data Direction Register B
(DDRB)
Write:
Reset:
Read:
Unimplemented Write:
PTD7
0
0
DDRB7
0
PTD6
DDRA6
0
DDRB6
0
PTD5
DDRA5
0
DDRB5
0
PTD4
PTD3
Unaffected by reset
DDRA4 DDRA3
0
0
DDRB4 DDRB3
0
0
PTD2
DDRA2
0
DDRB2
0
PTD1
DDRA1
0
DDRB1
0
PTD0
DDRA0
0
DDRB0
0
$0007
$0008
↓
$0009
$000A
$000B
↓
$000C
$000D
$000E
↓
$0019
Read:
Data Direction Register D
(DDRD)
Write:
Reset:
Read:
Unimplemented Write:
DDRD7
0
Read: 0
Port D Control Register
(PDCR)
Write:
Reset: 0
Read:
Unimplemented Write:
Read:
Port A Input Pull-up Enable
Register (PTAPUE)
Write:
Reset:
Read:
Unimplemented ^Write:
PTA6EN
0
DDRD6
0
DDRD5
0
DDRD4
0
DDRD3
0
DDRD2
0
DDRD1
0
DDRD0
0
0
0
0
SLOWD7 SLOWD6 PTDPU7 PTDPU6
0
0
0
0
0
0
0
PTAPUE6 PTAPUE5 PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1 PTAPUE0
0
0
0
0
0
0
0
= Unimplemented
R = Reserved
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 4)
MC68HC908JL3E Family Data Sheet, Rev. 4
Freescale Semiconductor
23