MC68HC908AS32A Datasheet, PDF (31/280 Pages) Freescale Semiconductor, Inc – Microcontrollers

Vector Addresses and Priority
$FE20
↓
$FF1F
$FF20
↓
$FF7F
$FF80
$FF81
↓
$FF87
$FF88
$FF89
↓
$FF8F
$FF90
↓
$FFBF
$FFC0
↓
$FFD9
$FFDA
↓
$FFFF
MONITOR ROM (256 BYTES)
UNIMPLEMENTED (80 BYTES)
FLASH BLOCK PROTECT REGISTER (FLBPR)
RESERVED (7 BYTES)
FLASH CONTROL REGISTER (FLCR)
RESERVED (6 BYTES)
UNIMPLEMENTED (48 BYTES)
RESERVED (26 BYTES)
VECTORS (38 BYTES)
Figure 2-1. Memory Map (Continued)
Addr.
$0000
$0001
$0002
$0003
$0004
Register Name
Port A Data Register ^Read:
(PTA) Write:
See page 151. _Reset:
Port B Data Register ^Read:
(PTB) Write:
See page 153. _Reset:
Port C Data Register ^Read:
(PTC) Write:
See page 155. _Reset:
Port D Data Register ^Read:
(PTD) Write:
See page 157. _Reset:
Data Direction Register A ^Read:
(DDRA) Write:
See page 151. _Reset:
Bit 7
PTA7
PTB7
0
0
DDRA7
0
6
PTA6
5
PTA5
PTB6
PTB5
0
0
PTD6
PTD5
DDRA6 DDRA5
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
R
= Reserved U = Unaffected
Figure 2-2. I/O Data, Status and Control Registers (Sheet 1 of 6)
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
MC68HC908AS32A Data Sheet, Rev. 2.0
Freescale Semiconductor
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