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參數資料
| 型號： | W79E201A16LN |
| 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, PQFP48 |
| 封裝： | ROHS COMPLIANT, LQFP-44 |
| 文件頁數： | 54/87頁 |
| 文件大?。?/td> | 818K |
| 代理商： | W79E201A16LN |
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W79E201
- 54 -
divide by 16 Counter, and not directly to the write to SBUF signal. After all 9 bits of data are
transmitted, the stop bit is transmitted. The TI flag is set in the C1 state after the stop bit has been put
out on TxD pin. This will be at the 11th rollover of the divide by 16 Counter after a write to SBUF.
Reception is enabled only if REN is high. The serial port actually starts the receiving of serial data,
with the detection of a falling edge on the RxD pin. The 1-to-0 detector continuously monitors the RxD
line, sampling it at the rate of 16 times the selected baud rate. When a falling edge is detected, the
divide by 16 Counter is immediately reset. This helps to align the bit boundaries with the rollovers of
the divide by 16 Counter. The 16 states of the counter effectively divide the bit time into 16 slices. The
bit detection is done on a best of three bases. The bit detector samples the RxD pin, at the 8th, 9th
and 10th counter states. By using a majority 2 of 3 voting system, the bit value is selected. This is
done to improve the noise rejection feature of the serial port.
SBUF
RB8
Transmit Shift Register
Receive Shift Register
TX SHIFT
PAROUT
D8
Internal
Data Bus
Internal
Data
Bus
TXD
RXD
Serial Port
Interrupt
SMOD=
SAMPLE
Write to
SBUF
TX START
SOUT
0
1
TI
PARIN
STOP
START
LOAD
CLOCK
Read
SBUF
TX CLOCK
RI
SERIAL
CONTROLLE
RX CLOCK
LOAD
SBUF
RX START
RX SHIFT
2
16
1-TO-0
DETECTOR
BIT
DETECTOR
16
CLOCK
SIN
D8
TB8
OSC
0
1
Serial Port Mode 2
If the first bit detected after the falling edge of RxD pin, is not 0, then this indicates an invalid start bit,
and the reception is immediately aborted. The serial port again looks for a falling edge in the RxD line.
If a valid start bit is detected, then the rest of the bits are also detected and shifted into the SBUF.
After shifting in 9 data bits, there is one more shift to do, after which the SBUF and RB8 are loaded
and RI is set. However certain conditions must be met before the loading and setting of RI can be
done.
1. RI must be 0 and
2. Either SM2 = 0, or the received stop bit = 1.
If these conditions are met, then the stop bit goes to RB8, the 8 data bits go into SBUF and RI is set.
Otherwise the received frame may be lost. After the middle of the stop bit, the receiver goes back to
looking for a 1-to-0 transition on the RxD pin.
Mode 3
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W79E201A16PL | 功能描述:IC MCU 8-BIT 16K FLASH 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W79 標準包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設備:DMA，LVD，POR，PWM，WDT 輸入/輸出數:27 程序存儲器容量:16KB（16K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數據轉換器:A/D 8x10b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤 |
| W79E201A16PN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| 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 |
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