Fujitsu MB89950/950A User Manual
265
APPENDIX A I/O Map
●
Read/write access symbols
R/W: Readable and writable
R: Read-only
W: Write-only
●
Initial value symbols
0: The initial value of this bit is "0"
1: The initial value of this bit is "1"
X: The initial value of this bit is undefined
-: Unused
Note:
Do not use vacancies.
1D
H
SDR
Serial data register
R/W
XXXXXXXX
B
1E
H
(Vacancy)
1F
H
20
H
SMC1
UART serial mode control register 1
R/W
00000-00
B
21
H
SRC
UART serial rate control register
R/W
--011000
B
22
H
SSD
UART serial status/data register
R/W
00100-1X
B
23
H
SIDR/SODR
UART serial data register
R/W
XXXXXXXX
B
24
H
SMC2
UART serial mode control register 2
R/W
--1-0-00
B
25
H
to 2F
H
(Vacancy)
30
H
EIC
External interrupt control register
R/W
00000000
B
31
H
to 63
H
(Vacancy)
64
H
to 78
H
VRAM
LCD data RAM
R/W
XXXXXXXX
B
79
H
LCDR
LCD control register
R/W
-0010000
B
7A
H
SEGR
Segment output select register
R/W
-0000000
B
7B
H
(Vacancy)
7C
H
ILR1
Interrupt level setting register 1
W
11111111
B
7D
H
ILR2
Interrupt level setting register 2
W
11111111
B
7E
H
ILR3
Interrupt level setting register 3
W
11111111
B
7F
H
ITR
Interrupt test register
Access
prohibited
XXXXXX00
B
Table A-1 I/O map (2/2)
Address
Register name
Register description
Read/Write
Initial value