參數(shù)資料
型號: HD404369S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer
中文描述: 4位HMCS400系列微機
文件頁數(shù): 50/115頁
文件大小: 452K
代理商: HD404369S
HD404369 Series
50
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
*
Note:
PMRB3 is reset to 0 only by
RESET
input. When
STOPC
is input in stop mode, PMRB3 is not
reset but retains its value.
*
Figure 29 Port Mode Register B (PMRB)
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 30 Port Mode Register A (PMRA)
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