MC68HC908RF2 Datasheet, PDF (36/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Memory Map
Addr.
$0000
$0001
$0002
Register Name
Bit 7
Read:
Port A Data Register
(PTA) Write:
See page 177.
Reset:
PTA7
Read:
Port B Data Register
(PTB) Write:
See page 180.
Reset:
Unimplemented
6
PTA6
5
4
3
2
PTA5 PTA4 PTA3 PTA2
Unaffected by reset
PTB3 PTB2
Unaffected by reset
1
PTA1
PTB1
Bit 0
PTA0
PTB0
$0003
Unimplemented
$0004
Read:
Data Direction Register A
(DDRA) Write:
See page 178.
Reset:
DDRA7
0
DDRA6
0
Read:
0
Data Direction Register B
MCLKEN
$0005
(DDRB) Write:
See page 181.
Reset: 0
0
$0006
Unimplemented
↓
$0019
Unimplemented
DDRA5
0
0
DDRA4
0
0
DDRA3
0
DDRB3
0
DDRA2
0
DDRB2
0
DDRA1
0
DDRB1
0
DDRA0
0
DDRB0
0
$001A
IRQ and Keyboard Status ^Read:
and Control Register
(INTKBSCR)
Write:
See page 193. _Reset:
IRQ1F
R
0
Read: 0
Keyboard Interrupt Enable
$001B
Register (INTKBIER) Write:
See page 196.
Reset: 0
0
IMASKI
ACKI
0
0
KBIE6 KBIE5
0
0
= Unimplemented
MODEI
0
KEYF
R
0
KBIE4 KBIE3
0
ACKK
0
KBIE2
IMASKK MODEK
0
0
0
KBIE1
0
0
0
0
0
R = Reserved U = Unaffected X = Indeterminate
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 6)
Advance Information
36
Memory Map
MC68HC908RF2 — Rev. 1
MOTOROLA