參數(shù)資料
型號: HD404654
廠商: Hitachi,Ltd.
英文描述: RESISTOR, 0.10 OHM 5W
中文描述: 4位單片機
文件頁數(shù): 76/109頁
文件大?。?/td> 430K
代理商: HD404654
HD404654 Series
76
LSB
MSB
1
2
3
4
5
6
7
8
Transmit clock
Serial output
data
Serial input data
latch timing
Figure 60 Serial Interface Output Timing
Port Mode Register A (PMRA: $004):
This register has the following functions (figure 61).
R4
2
/SI
1
pin function selection
R4
3
/SO
1
pin function selection
Port mode register A is a 4-bit write-only register, and is reset to $0 by MCU reset.
Bit
Initial value
Read/Write
Bit name
0
0
W
PMRA0
1
0
W
PMRA1
Port mode register A (PMRA: $004)
PMRA0
0
1
R4
3
/SO
1
mode selection
R4
3
SO
1
PMRA1
0
1
R4
2
/SI
1
mode selection
R4
2
SI
1
3
Not used
2
Not used
Figure 61 Port Mode Register A (PMRA)
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