參數(shù)資料
型號(hào): HD4074318H
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): 28/66頁(yè)
文件大?。?/td> 305K
代理商: HD4074318H
HD404318 Series
28
Bit
Initial value
Read/Write
Bit name
3
0
W
PMRA3
2
0
W
PMRA2
0
0
W
PMRA0
1
0
W
PMRA1
PMRA0
0
1
R0
2
/SO Mode Selection
R0
2
SO
Port mode register A (PMRA: $004)
PMRA1
0
1
R0
1
/SI Mode Selection
R0
1
SI
PMRA2
0
1
R0
3
/TOC Mode Selection
R0
3
TOC
PMRA3
0
1
D
3
/BUZZ Mode Selection
D
3
BUZZ
Figure 18 Port Mode Register A (PMRA)
Bit
Initial value
Read/Write
Bit name
3
0
W
PMRB3
2
0
W
PMRB2
0
0
W
PMRB0
1
0
W
PMRB1
PMRB0
0
1
D
0
/
INT
0
Mode Selection
D
0
INT
0
Port mode register B (PMRB: $024)
PMRB1
0
1
D
1
/
INT
1
Mode Selection
D
1
INT
1
PMRB2
0
1
D
2
/EVNB Mode Selection
D
2
EVNB
PMRB3
0
1
D
4
/
STOPC
Mode Selection
D
4
STOPC
*
PMRB3 is reset to 0 only by RESET input. When STOPC is input in stop mode,
PMRB3 is not reset but retains its value.
Note:
*
Figure 19 Port Mode Register B (PMRB)
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