APPENDIX A I/O Map
APPENDIX A I/O Map
Table A lists the addresses of the registers used by the internal peripheral functions of
the MB89120/120A series.
I/O Map
Table A-1 I/O Map
Register
Address
name
00
PDR0
H
01
DDR0
H
02
PDR1
H
03
DDR1
H
04
PDR2
H
05
H
06
H
07
SYCC
H
08
STBC
H
09
WDTC
H
0A
TBTC
H
0B
WPCR
H
0C
PDR3
H
0D
DDR3
H
0E
PDR4
H
0F
BZCR
H
10
H
11
H
12
SCGC
H
13
H
14
RCR1
H
15
RCR2
H
304
Register description
Port 0 data register
Port 0 data direction register
Port 1 data register
Port 1 data direction register
Port 2 data register
(Vacancy)
System clock control register
Standby control register
Watchdog timer control register
Timebase timer control register
Watch prescaler control register
Port 3 data register
Port 3 data direction register
Port 4 data register
Buzzer register
(Vacancy)
Peripheral control clock register
(Vacancy)
Remote-controll control register 1*
Remote-controll control register 2*
Read/Write
Initial value
R/W
XXXXXXXX
W
00000000
R/W
XXXXXXXX
W
00000000
R/W
00000000
XXXXXXXX
R/W
XXXMM100
R/W
00010XXX
R/W
0XXXXXXX
R/W
00XXX000
R/W
00XXX000
R/W
XXXXXXXX
W
00000000
R/W
11111111
R/W
XXXXX000
XXXXXXXX
R/W
XXXXXX00
XXXXXXXX
R/W
00000000
R/W
00000000
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B