參數(shù)資料
型號(hào): HD40A4358S
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(yè)數(shù): 38/100頁(yè)
文件大?。?/td> 398K
代理商: HD40A4358S
HD404358 Series
38
Bit
Initial value
Read/Write
Bit name
3
0
W
2
0
W
0
0
W
1
0
W
DCD0, DCD2, DCR0 to DCR4, DCR8
Data control register
(DCD0 to 2: $02C to $02E)
(DCR0 to 4: $030 to $034, DCR8: $038)
Correspondence between ports and DCD/DCR bits
0
1
DCD0
DCD1
DCD2
DCR0
DCR1
DCR2
DCR3
DCR4
DCR8
Off (high-impedance)
On
Bits 0 to 3
CMOS Buffer On/Off Selection
Register Name
D
3
D
7
Not used
R0
3
R1
3
R2
3
R3
3
R4
3
R8
3
Bit 3
D
2
D
6
Not used
R0
2
R1
2
R2
2
R3
2
R4
2
R8
2
Bit 2
D
1
D
5
Not used
R0
1
R1
1
R2
1
R3
1
R4
1
R8
1
Bit 1
D
0
D
4
D
8
R0
0
R1
0
R2
0
R3
0
R4
0
R8
0
Bit 0
DCD03,
DCD13,
DCR03–
DCR43,
DCR83
DCD02,
DCD12,
DCR02–
DCR42,
DCR82
DCD01,
DCD11,
DCR01–
DCR41,
DCR81
DCD00–
DCD20,
DCR00–
DCR40,
DCR80
Figure 21 Data Control Registers (DCD, DCR)
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