參數(shù)資料
型號: HD404448
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計算機)
中文描述: 4位HMCS400系列微機(4位單片微計算機)
文件頁數(shù): 47/123頁
文件大?。?/td> 726K
代理商: HD404448
HD404449 Series
47
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
Bit
Initial value
Read/Write
Bit name
3
0
W
DCD23
2
0
W
DCD22
0
0
W
DCD20
1
0
W
DCD21
DCD2
(DCD0 to 2: $02C to $02E)
DCR0 to C: $030 to $03C)
Bit
Initial value
Read/Write
Bit name
Correspondence between ports and DCD/DCR bits
0
1
DCD0
DCD1
DCD2
DCR0
DCR1
DCR2
DCR3
DCR4
DCR5
DCR6
DCR7
DCR8
DCR9
DCRA
DCRB
DCRC
Off (high-impedance)
On
3
0
W
DCR03–
DCRC3
2
0
W
DCR02–
DCRC2
0
0
W
DCR00–
DCRC0
1
0
W
DCR01–
DCRC1
DCR0 to DCRC
All Bits
CMOS Buffer On/Off Selection
Register Name
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
RC
3
Bit 3
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
RC
2
Bit 2
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
RC
1
Bit 1
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
Bit 0
Figure 29 Data Control Registers (DCD, DCR)
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