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參數(shù)資料
| 型號： | μPD789417 |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機(jī)微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 62/126頁 |
| 文件大?。?/td> | 590K |
| 代理商： | ΜPD789417 |
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62
μ
PD789415, 789416, 789417
5.9 Serial Interface Channel 0
5.9.1 Functions of serial interface channel 0
Serial interface channel 0 has the following three modes.
Operation stopped mode
Asynchronous serial interface (UART) mode
Three-wire serial I/O mode
(1) Operation stopped mode
This mode is used when serial transfer is not performed. Power consumption is minimized in this mode.
(2) Asynchronous serial interface (UART) mode
This mode is used to send and receive the one byte of data that follows a start bit. It supports full-duplex
communication.
Serial interface channel 0 contains a dedicated UART baud rate generator, enabling communication over a wide
range of baud rates. It is also possible to define baud rates by dividing the frequency of the input clock pulse at
the ASCK pin.
(3) Three-wire serial I/O mode (switchable between MSB-first and LSB-first transmission)
This mode is used to transmit 8-bit data, using three lines: a serial clock (SCK) line and two serial data lines (SI
and SO).
As it supports simultaneous transmission and reception, three-wire serial I/O mode requires less processing
time for data transmission than asynchronous serial interface mode.
Because, in three-wire serial I/O mode, it is possible to select whether 8-bit data transmission begins with the
MSB or LSB, channel 0 can be connected to any device regardless of whether that device is designed for MSB-
first or LSB-first transmission.
Three-wire serial I/O mode is useful for connecting peripheral I/O circuits and display controllers having
conventional clock synchronous serial interfaces, such as those of the 75X/XL, 78K, and 17K series devices.
5.9.2 Serial interface channel 0 configuration
Serial interface channel 0 consists of the following hardware.
Table 5-12. Serial Interface Channel 0 Configuration
Item
Configuration
Register
Transmission shift register (TXS)
Reception shift register (RXS)
Reception buffer register (RXB)
Control register
Serial operation mode register 0 (CSIM0)
Asynchronous serial interface mode register (ASIM)
Asynchronous serial interface status register (ASIS)
Baud rate generator control register (BRGC)
相關(guān)PDF資料 |
PDF描述 |
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| μPD789415 | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| μPD789416 | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| μPD789800 | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PD78F0134 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134(A) | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134(A1) | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134A | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134A1 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
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