- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄363900 > W79E217A (WINBOND ELECTRONICS CORP) 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | W79E217A |
| 廠(chǎng)商： | WINBOND ELECTRONICS CORP |
| 元件分類(lèi)： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁(yè)數(shù)： | 140/207頁(yè) |
| 文件大?。?/td> | 3738K |
| 代理商： | W79E217A |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)當(dāng)前第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)第191頁(yè)第192頁(yè)第193頁(yè)第194頁(yè)第195頁(yè)第196頁(yè)第197頁(yè)第198頁(yè)第199頁(yè)第200頁(yè)第201頁(yè)第202頁(yè)第203頁(yè)第204頁(yè)第205頁(yè)第206頁(yè)第207頁(yè)
Preliminary W79E217A Data Sheet
Publication Release Date: December 14, 2007
- 140 -
Revision A3.0
The serial port receives data when REN is 1 and RI is zero. The shift clock (TxD) is activated, and the
serial port latches data on the rising edge of the shift clock. The external device should, therefore,
present data on the falling edge of the shift clock. This process continues until all eight bits have been
received. The RI flag is set in C1 following the last rising edge of the shift clock, which stops reception
until RI is cleared by the software.
16.2 Mode 1
In Mode 1, full-duplex asynchronous communication is used. Frames consist of ten bits transmitted on
TXD and received on RXD. The ten bits consist of a start bit (0), eight data bits (LSB first), and a stop
bit (1). When receiving, the stop bit goes into RB8 in SCON. The baud rate in this mode is 1/16 or 1/32
of the Timer 1 overflow, and since Timer 1 can be set to a wide range of values, a wide variation of
baud rates is possible.
Transmission begins with a write to SBUF but is synchronized with the divide-by-16 counter, not the
write to SBUF. The start bit is put on TxD at C1 following the first roll-over of the divide-by-16 counter,
and the next bit is placed at C1 following the next rollover. After all eight bits are transmitted, the stop
bit is transmitted. The TI flag is set in the next C1 state, or the tenth rollover of the divide-by-16
counter after the write to SBUF.
Reception is enabled when REN is high, and the serial port starts receiving data when it detects a
falling edge on RxD. The falling-edge detector monitors the RxD line at 16 times the selected baud
rate. When a falling edge is detected, the divide-by-16 counter is reset to align the bit boundaries with
the rollovers of the counter. The 16 states of the counter divide the bit time into 16 slices. Bit detection
is done on a best-of-three basis using samples at the 8th, 9th and 10th counter states. If the first bit
after the falling edge is not 0, the start bit is invalid, reception is aborted immediately, and the serial
port resumes looking for a falling edge on RxD. If a valid start bit is detected, the rest of the bits are
shifted into SBUF. After shifting in eight data bits, the stop bit is received. Then, if;
1. RI is 0, and
2. SM2 is 0 or the received stop bit is 1,
the stop bit goes into RB8, the eight data bits go into SBUF, and RI is set. Otherwise, the received
frame is lost. In the middle of the stop bit, the receiver resumes looking for a falling edge on RxD.
1/2
1/16
TX CLOCK
RX CLOCK
TI
RI
TX SHIFT
TX START
RX SHIFT
LOAD SBUF
SMOD
CLOCK
SIN
D8
SBUF
Read SBUF
Internal
Data Bus
Serial
Controllor
CLOCK
LOAD
PARIN
START
TX START
Internal
Data Bus
Write to
SBUF
SOUT
Transmit Shift Register
Serial Interrupt
TXD
RXD
PAROUT
RB8
STOP
0
1
BIT
DETECTOR
1-To-0
DETECTOR
SAMPLE
1/16
0
Timer 1
Overflow
1
Receive Shift Register
0
1
0
1
TCLK
RCLK
Timer 2
Overflow
Figure 16-2 Serial Port Mode 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W79E217AFG | 8-BIT MICROCONTROLLER |
| W79E225A | 8-BIT MICROCONTROLLER |
| W79E225AFG | 8-BIT MICROCONTROLLER |
| W79E225APG | 8-BIT MICROCONTROLLER |
| W79E227A | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W79E217AFG | 制造商:Nuvoton Technology Corp 功能描述:IC MCU 8051 100PQFP |
| W79E225A | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-bit Microcontroller |
| W79E225A_08 | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-bit Microcontroller |
| W79E225A_226A_227A | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:W79E225A_226A_227A_A7_SC5（中文） |
| W79E225AFG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-bit Microcontroller |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。