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APPENDIX
APPENDIX A I/O Map
Table A-1 "I/O map" lists the addresses of the registers of used by the internal
peripheral functions of the MB89950/950A series.
■ I/O map
Table A-1 I/O map (1/2)
Address Register name Register description Read/Write Initial value
00
H
PDR0 Port 0 data register R/W 11111111
B
01
H
(Vacancy)
02
H
PDR1 Port 1 data register R/W 11111111
B
03
H
(Vacancy)
04
H
PDR2 Port 2 data register R/W --111111
B
05
H
to 07
H
(Vacancy)
08
H
STBC Standby control register R/W 0001----
B
09
H
WDTC Watchdog timer control register W ----XXXX
B
0A
H
TBTC Timebase timer control register R/W ---00000
B
0B
H
(Vacancy)
0C
H
PDR3 Port 3 data register R/W ----1111
B
0D
H
(Vacancy)
0E
H
PDR4 Port 4 data register R/W -XXXXXXX
B
0F
H
DDR4 Port 4 direction register W -0000000
B
10
H
to 11
H
(Vacancy)
12
H
CNTR PWM timer control register R/W 0-000000
B
13
H
COMR PWM timer compare register W XXXXXXXX
B
14
H
PCR1 PWC pulse width control register 1 R/W 0-0--000
B
15
H
PCR2 PWC pulse width control register 2 R/W 000-0000
B
16
H
RLBR PWC reload buffer register R/W XXXXXXXX
B
17
H
NCCR PWC noise filter control register R/W ------00
B
18
H
to 1B
H
(Vacancy)
1C
H
SMR Serial mode register R/W 00000000
B