參數(shù)資料
型號: HD4074849H
廠商: Hitachi,Ltd.
英文描述: CONTACT
中文描述: 4位單片機
文件頁數(shù): 49/125頁
文件大小: 471K
代理商: HD4074849H
HD404849 Series
49
Bit
Initial value
Read/Write
Bit name
3
0
W
DCD03,
DCD13
2
0
W
DCD02,
DCD12
0
0
W
DCD00,
DCD10
1
0
W
DCD01,
DCD11
DCD0, DCD1
Data control register
(DCD0 to DCD2: $02C to $02E)
(DCR0 to DCR7: $030 to $037)
Bit
Initial value
Read/Write
Bit name
3
Not used
2
Not used
0
0
W
DCD20
1
Not used
DCD2
Bit
Initial value
Read/Write
Bit name
3
0
W
DCR03–
DCR33
DCR63– DCR62–
2
0
W
DCR02–
DCR32
0
0
W
DCR00–
DCR30
DCR60–
1
0
W
DCR01–
DCR31
DCR61–
DCR0 to DCR3, DCR6, DCR7
DCR73
DCR72
DCR70
DCR71
Correspondence between ports and DCD/DCR bits
0
1
DCD0
DCD1
DCD2
DCR0
DCR1
DCR2
DCR3
DCR6
DCR7
Off (high-impedance)
On
All Bits
CMOS Buffer On/Off Selection
Register Name
D
3
D
7
R0
3
R1
3
R2
3
R3
3
R6
3
R7
3
Bit 3
D
2
D
6
R0
2
R1
2
R2
2
R3
2
R6
2
R7
2
Bit 2
D
1
D
5
R0
1
R1
1
R2
1
R3
1
R6
1
R7
1
Bit 1
D
0
D
4
D
8
R0
0
R1
0
R2
0
R3
0
R6
0
R7
0
Bit 0
Figure 29 Data Control Registers (DCD, DCR)
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