參數(shù)資料
型號(hào)： HD4074654S
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 74/109頁(yè)
文件大?。?/td> 430K
代理商： HD4074654S
HD404654 Series
74
Bit
Initial value
Read/Write
Bit name
3
0
W
SM1A3
2
0
W
SM1A2
0
0
W
SM1A0
1
0
W
SM1A1
Serial mode register 1A (SM1A: $005)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SM1A2
SM1A0
SM1A1
SM1A3
0
1
R4
1
/
SCK
1
mode selection
R4
1
SCK
1
SCK
1
Output
Output
Input
Clock source
Prescaler
System clock
External clock
—
—
Prescaler
division ratio
Refer to
table 25
Figure 56 Serial Mode Register 1A (SM1A)
Serial Mode Register 1B (SM1B: $028):
This register has the following functions (figure 57).
Serial interface 1 prescaler division ratio selection
Serial interface 1 output level control in idle states
Serial mode register 1B is a 2-bit write-only register. It cannot be written during data transfer.
By setting bit 0 (SM1B0) of this register, the serial interface 1 prescaler division ratio is selected. Only bit
0 (SM1B0) can be reset to 0 by MCU reset. By setting bit 1 (SM1B1), the output level of the SO
1
pin is
controlled in idle states of serial interface 1. The output level changes at the same time that SM1B1 is
written to.
相關(guān)PDF資料
PDF描述
HD4046612 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
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HD404668 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074678H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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HD4074709H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074709S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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