參數(shù)資料
型號: HD404369F
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer
中文描述: 4位HMCS400系列微機(jī)
文件頁數(shù): 49/115頁
文件大小: 452K
代理商: HD404369F
HD404369 Series
49
Bit
Initial value
Read/Write
Bit name
3
0
W
2
0
W
0
0
W
1
0
W
DCD0 to DCD3, DCR0 to DCR9
Data control register
(DCD0 to 3: $02C to $02F)
(DCR0 to 9: $030 to $039)
Correspondence between ports and DCD/DCR bits
0
1
DCD0
DCD1
DCD2
DCD3
DCR0
DCR1
DCR2
DCR3
DCR4
DCR5
DCR6
DCR7
DCR8
DCR9
Off (high-impedance)
On
Bits 0 to 3
CMOS Buffer On/Off Selection
Register Name
D
3
D
7
D
11
Not used
R0
3
R1
3
R2
3
R3
3
R4
3
R5
3
R6
3
Not used
R8
3
R9
3
Bit 3
D
2
D
6
D
10
Not used
R0
2
R1
2
R2
2
R3
2
R4
2
R5
2
R6
2
R7
2
R8
2
R9
2
Bit 2
D
1
D
5
D
9
D
13
R0
1
R1
1
R2
1
R3
1
R4
1
R5
1
R6
1
R7
1
R8
1
R9
1
Bit 1
D
0
D
4
D
8
D
12
R0
0
R1
0
R2
0
R3
0
R4
0
R5
0
R6
0
R7
0
R8
0
R9
0
Bit 0
DCD03–
DCD23,
DCR03–
DCR63,
DCR83–
DCR93
DCD02–
DCD22,
DCR02–
DCR92
DCD01–
DCD31,
DCR01–
DCR91
DCD00–
DCD30,
DCR00–
DCR90
Figure 28 Data Control Registers (DCD, DCR)
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