MC68HC908GR16 Datasheet, PDF (29/276 Pages) Motorola, Inc – Microcontrollers

Input/Output (I/O) Section
$FE10
↓
$FE1F
UNIMPLEMENTED
16 BYTES
RESERVED FOR COMPATIBILITY WITH MONITOR CODE
FOR A-FAMILY PART
$FE20
↓
$FF7D
MONITOR ROM
350 BYTES
$FF7E
FLASH BLOCK PROTECT REGISTER (FLBPR)
$FF7F
↓
$FFD3
UNIMPLEMENTED
85 BYTES
$FFD4
↓
$FFFF⁽¹⁾
FLASH VECTORS
44 BYTES
1. $FFF6–$FFFD used for eight security bytes
Figure 2-1. Memory Map (Continued)
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
Register Name
Port A Data Register ^Read:
(PTA) Write:
See page 124. _Reset:
Port B Data Register ^Read:
(PTB) Write:
See page 126. _Reset:
Port C Data Register ^Read:
(PTC) Write:
See page 128. _Reset:
Port D Data Register ^Read:
(PTD) Write:
See page 130. _Reset:
Data Direction Register A ^Read:
(DDRA) Write:
See page 124. _Reset:
Data Direction Register B ^Read:
(DDRB) Write:
See page 126. _Reset:
Bit 7
PTA7
PTB7
0
PTD7
DDRA7
0
DDRB7
0
6
PTA6
PTB6
PTC6
PTD6
DDRA6
0
DDRB6
0
5
PTA5
PTB5
PTC5
PTD5
DDRA5
0
DDRB5
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
0
0
DDRB4 DDRB3
0
0
2
PTA2
PTB2
PTC2
PTD2
DDRA2
0
DDRB2
0
1
PTA1
PTB1
PTC1
PTD1
DDRA1
0
DDRB1
0
Bit 0
PTA0
PTB0
PTC0
PTD0
DDRA0
0
DDRB0
0
= Unimplemented
R = Reserved U = Unaffected
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 8)
MC68HC908GR16 Data Sheet, Rev. 5.0
Freescale Semiconductor
29