Freescale Semiconductor, Inc.
Memory Map
Addr.
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Port A Data Register
(PTA) Write:
PTA7
PTA6
PTA5
PTA4
PTA3
PTA2
PTA1
PTA0
$0000
See page 177.
Reset:
Read:
Unaffected by reset
PTB3
Port B Data Register
PTB2
PTB1
PTB0
$0001
$0002
$0003
(PTB) Write:
See page 180.
Reset:
Unaffected by reset
Unimplemented
Unimplemented
Read:
Data Direction Register A
DDRA7 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0
$0004
$0005
(DDRA) Write:
See page 178.
Reset:
Read:
0
MCLKEN
0
0
0
0
0
0
0
0
0
Data Direction Register B
DDRB3 DDRB2 DDRB1 DDRB0
(DDRB) Write:
See page 181.
Reset:
0
0
0
0
0
0
0
$0006
↓
Unimplemented
Unimplemented
$0019
Read: IRQ1F
0
ACKI
0
KEYF
0
ACKK
0
IRQ and Keyboard Status
and Control Register
(INTKBSCR)
IMASKI MODEI
IMASKK MODEK
$001A
$001B
Write:
Reset:
Read:
R
0
R
0
See page 193.
0
KBIE5
0
0
0
KBIE1
0
0
0
0
Keyboard Interrupt Enable
KBIE6
0
KBIE4
KBIE3
0
KBIE2
0
Register (INTKBIER) Write:
See page 195.
Reset:
0
0
0
= Unimplemented
R
= Reserved U = Unaffected X = Indeterminate
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 6)
Advance Information
34
MC68HC908RFRK2
MOTOROLA
Memory Map
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