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參數(shù)資料
| 型號(hào)： | HD40A4084 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| 中文描述： | 低電壓如同在微機(jī)芯片的A / D轉(zhuǎn)換器（帶片上的A / D轉(zhuǎn)換器的低壓微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 93/162頁(yè) |
| 文件大小： | 482K |
| 代理商： | HD40A4084 |
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HD404374/HD404384/HD404389/HD404082/HD404084 Series
93
Serial Interface Operation
Selecting and changing serial interface operating mode:
The operating modes that can be selected for the serial interface are shown in table 26. The combination of
port mode register 3 (PMR3) values should be selected from this table. When the serial interface operating
mode is changed, the serial interface internal state must be initialized by writing to serial mode register 1
(SMR1).
Note : The serial interface is initialized by writing to serial mode register 1 (SMR1: $024). See figure 56
Serial Mode Register 1, for details.
Table 26
Serial Interface Operating Modes
PMR3
Bit3
Bit2
Bit1
Serial interface operating mode
0
*
1
Clock continuous output mode
1
0
1
Receive mode
1
Note : * Don't care
1
1
Transmit mode
Serial interface pin setting:
The R2
1
/
SCK
pin and R2
2
/SI/SO pin are set by writing data to port mode register 3 (PMR3). See Serial
Interface Registers, for details.
Serial clock source setting:
The serial clock is set by writing data to serial mode register 1 (SMR1). See Serial Interface Registers, for
details.
Serial data setting:
Transmit serial data is set by writing data to the serial data register (SRL, SRU).
Receive serial data is obtained by reading the serial data register (SRL, SRU). Serial data is shifted by
means of the serial clock to perform input/output from/to an external device.
The output level of the SO pin is undetermined until the first data is output after a reset by the MCU, or
until high/low control is performed in the idle state.
Transfer control:
Serial interface operation is started by an STS instruction. The octal counter is reset to 000 by the STS
instruction, and is incremented by 1 on each rise of the serial clock. When 8 serial clock pulses have been
input, or if data transmission/reception is suspended midway, the octal counter is reset to 000, the serial
interrupt request flag (IFS) is set, and transfer is terminated.
The serial clock is selected by means of serial mode register 1 (SMR1). See figure 56.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD40C4084 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HD40C4384 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HD40C4388 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HD40C4389 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HD404394 | 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD40A4240F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD40A4240H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS 4bit single-chip microcomputers |
| HD40A4240P | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS 4bit single-chip microcomputers |
| HD40A4240S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:CMOS 4bit single-chip microcomputers |
| HD40A4354 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter, |
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