參數(shù)資料
型號(hào): HD404339FS
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer with large-capacity memory
中文描述: 4位HMCS400系列的大容量存儲(chǔ)器微機(jī)
文件頁(yè)數(shù): 31/78頁(yè)
文件大?。?/td> 337K
代理商: HD404339FS
HD404339 Series
31
Bit
Initial value
Read/Write
Bit name
3
0
W
DCR03,
DCR33
to
DCR63
2
0
W
DCR02,
DCR32
to
DCR72
0
0
W
DCR00,
DCR30
to
DCR70
1
0
W
DCR01,
DCR31
to
DCR71
DCR0, DCR3
to DCR7
Data control register
(DCR0: $030, DCR3 to DCR7: $033 to $037)
Bits 0 to 3
0
CMOS Buffer Control
CMOS buffer off
(high impedance)
CMOS buffer on
Register
DCR0
DCR3
DCR4
DCR5
DCR6
DCR7
Bit 3
R0
3
R3
3
R4
3
R5
3
R6
3
Not used
Correspondence between ports and DCR bits
Bit 2
R0
2
R3
2
R4
2
R5
2
R6
2
R7
2
Bit 1
R0
1
R3
1
R4
1
R5
1
R6
1
R7
1
Bit 0
R0
0
R3
0
R4
0
R5
0
R6
0
R7
0
1
Figure 22 Data Control Register (DCR)
相關(guān)PDF資料
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