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參數(shù)資料
| 型號： | W77E58-25 |
| 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, 25 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數(shù)： | 67/85頁 |
| 文件大小： | 570K |
| 代理商： | W77E58-25 |
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Preliminary W77E58
Publication Release Date: March 1999
- 67 - Revision A1
SBUF
RB8
Transmit Shift Register
Receive Shift Register
TX
SHIFT
PAROUT
D8
Internal
Data Bus
Internal
Data
Bus
TXD
RXD
Serial Port
Interrupt
SMOD=
(SMOD_1)
SAMPLE
Write to
SBUF
TX
START
TX
CLOCK
SOUT
0
1
TI
PARIN
STOP
START
LOAD
CLOCK
Read
SBUF
RI
SERIAL
CONTROLLER
RX CLOCK
LOAD
SBUF
RX START
RX SHIFT
2
16
1-TO-0
DETECTOR
BIT
DETECTOR
16
CLOCK
SIN
D8
TB8
Clock Source
Mode input
div. by 4 osc/2
div. by 64 osc/32
div. by 1024 osc/512
Figure 22. 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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W77E58-40 | 8 BIT MICROCONTROLLER |
| W77E58F-25 | 8 BIT MICROCONTROLLER |
| W77E58F-40 | 8 BIT MICROCONTROLLER |
| W77E58P-25 | 8 BIT MICROCONTROLLER |
| W77E58P-40 | 8 BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W77E58-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58F-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58P-25 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
| W77E58P-40 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8 BIT MICROCONTROLLER |
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