- 您現在的位置：買賣IC網 > PDF目錄363900 > W79E201A16PN (WINBOND ELECTRONICS CORP) 8-BIT MICROCONTROLLER PDF資料下載
參數資料
| 型號： | W79E201A16PN |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | ROHS COMPLIANT, PLASTIC, LCC-44 |
| 文件頁數： | 51/87頁 |
| 文件大小： | 818K |
| 代理商： | W79E201A16PN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁
W79E201
Publication Release Date: December 16, 2004
- 51 -
Revision A2
13. SERIAL PORT
Serial port in the W79E201 is a full duplex port. The W79E201 provides the user with additional
features such as the Frame Error Detection and the Automatic Address Recognition. The serial ports
are capable of synchronous as well as asynchronous communication. In Synchronous mode the
W79E201 generates the clock and operates in a half duplex mode. In the asynchronous mode, full
duplex operation is available. This means that it can simultaneously transmit and receive data. The
transmit register and the receive buffer are both addressed as SBUF Special Function Register.
However any write to SBUF will be to the transmit register, while a read from SBUF will be from the
receive buffer register. The serial port can operate in four different modes as described below.
Mode 0
This mode provides synchronous communication with external devices. In this mode serial data is
transmitted and received on the RXD line. TXD is used to transmit the shift clock. The TxD clock is
provided by the W79E201 whether the device is transmitting or receiving. This mode is therefore a
half duplex mode of serial communication. In this mode, 8 bits are transmitted or received per frame.
The LSB is Transmitted/Received first. The baud rate is fixed at 1/12 or 1/4 of the oscillator frequency.
This baud rate is determined by the SM2 bit (SCON.5). When this bit is set to 0, then the serial port
runs at 1/12 of the clock. When set to 1, the serial port runs at 1/4 of the clock. This additional facility
of programmable baud rate in mode 0 is the only difference between the standard 8051 and the
W79E201.
The functional block diagram is shown below. Data enters and leaves the Serial port on the RxD line.
The TxD line is used to output the shift clock. The shift clock is used to shift data into and out of the
W79E201 and the device at the other end of the line. Any instruction that causes a write to SBUF will
start the transmission. The shift clock will be activated and data will be shifted out on the RxD pin till all
8 bits are transmitted. If SM2 = 1, then the data on RxD will appear 1 clock period before the falling
edge of shift clock on TxD. The clock on TxD then remains low for 2 clock periods, and then goes high
again. If SM2 = 0, the data on RxD will appear 3 clock periods before the falling edge of shift clock on
TxD. The clock on TxD then remains low for 6 clock periods, and then goes high again. This ensures
that at the receiving end the data on RxD line can either be clocked on the rising edge of the shift
clock on TxD or latched when the TxD clock is low.
相關PDF資料 |
PDF描述 |
|---|---|
| W79E217A | 8-BIT MICROCONTROLLER |
| W79E217AFG | 8-BIT MICROCONTROLLER |
| W79E225A | 8-BIT MICROCONTROLLER |
| W79E225AFG | 8-BIT MICROCONTROLLER |
| W79E225APG | 8-BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W79E2051 | 制造商:WINBOND 制造商全稱:Winbond 功能描述: |
| W79E2051AKG | 制造商:Winbond Electronics Corp 功能描述:8 BIT MCU 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20PDIP |
| W79E2051ASG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20SOP |
| W79E2051RAKG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20PDIP |
| W79E2051RARG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 2KB FLASH 20SSOP |
發布緊急采購，3分鐘左右您將得到回復。