參數(shù)資料
型號: HD404639R
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer(4位單片微計算機(jī))
中文描述: 4位單片機(jī)(4位單片微計算機(jī))
文件頁數(shù): 48/133頁
文件大小: 803K
代理商: HD404639R
HD404639R Series
48
Bit
Initial value
Read/Write
Bit name
3
0
W
2
0
W
0
0
W
1
0
W
DCD0 to DCD2
Data control register
(DCD0 to 2: $02C to $02E)
(DCR0 to C: $030 to $03C)
Bit
Initial value
Read/Write
Bit name
0
0
W
DCRC0
1
Not used
DCRC
Bit
Initial value
Read/Write
Bit name
Correspondence between ports and DCD/DCR bits
Register Name
DCD0
DCD1
DCD2
DCR0
DCR1
DCR2
DCR3
DCR4
DCR5
DCR6
DCR7
DCR8
DCR9
DCRA
DCRB
DCRC
3
0
W
DCR03–
DCRB3
Bit 3
D
3
D
7
D
11
R0
3
R1
3
R2
3
R3
3
R4
3
R5
3
R6
3
R7
3
R8
3
R9
3
RA
3
RB
3
Bit 2
D
2
D
6
D
10
R0
2
R1
2
R2
2
R3
2
R4
2
R5
2
R6
2
R7
2
R8
2
R9
2
RA
2
RB
2
Bit 1
D
1
D
5
D
9
R0
1
R1
1
R2
1
R3
1
R4
1
R5
1
R6
1
R7
1
R8
1
R9
1
RA
1
RB
1
Bit 0
D
0
D
4
D
8
R0
0
R1
0
R2
0
R3
0
R4
0
R5
0
R6
0
R7
0
R8
0
R9
0
RA
0
RB
0
RC
0
2
0
W
DCR02–
DCRB2
0
0
W
DCR00–
DCRB0
1
0
W
DCR01–
DCRB1
DCR0 to DCRB
3
Not used
2
Not used
DCD03–
DC
DCD02–
DCD22
DCD01–
DCD21
DCD00–
DCD20
0
1
Off (high-impedance)
On
All Bits
CMOS Buffer On/Off Selection
Figure 28 Data Control Registers (DCD, DCR)
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