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參數資料
| 型號： | W79E802A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數： | 24/115頁 |
| 文件大小： | 1456K |
| 代理商： | W79E802A |
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W79E804A/803A/802A
- 24 -
SERIAL PORT CONTROL
Bit:
7
6
5
4
3
2
1
0
SM0/FE
SM1
SM2
REN
TB8
RB8
TI
RI
Mnemonic: SCON
Address: 98h
BIT
NAME
FUNCTION
7
SM0/FE
Serial port mode select bit 0 or Framing Error Flag: The SMOD0 bit in PCON SFR
determines whether this bit acts as SM0 or as FE. The operation of SM0 is
described below. When used as FE, this bit will be set to indicate an invalid stop
bit. This bit must be manually cleared in software to clear the FE condition.
Serial Port mode select bit 1. See table below.
Multiple processors communication. Setting this bit to 1 enables the multiprocessor
communication feature in mode 2 and 3. In mode 2 or 3, if SM2 is set to 1, then RI
will not be activated if the received 9th data bit (RB8) is 0. In mode 1, if SM2 = 1,
then RI will not be activated if a valid stop bit was not received. In mode 0, the SM2
bit controls the serial port clock. If set to 0, then the serial port runs at a divide by
12 clock of the oscillator. This gives compatibility with the standard 8052. When set
to 1, the serial clock become divide by 4 of the oscillator clock. This results in faster
synchronous serial communication.
Receive enable:
0: Disable serial reception.
1: Enable serial reception.
This is the 9th bit to be transmitted in modes 2 and 3. This bit is set and cleared by
software as desired.
In modes 2 and 3 this is the received 9th data bit. In mode 1, if SM2 = 0, RB8 is the
stop bit that was received. In mode 0 it has no function.
Transmit interrupt flag: This flag is set by hardware at the end of the 8th bit time in
mode 0, or at the beginning of the stop bit in all other modes during serial
transmission. This bit must be cleared by software.
Receive interrupt flag: This flag is set by hardware at the end of the 8th bit time in
mode 0, or halfway through the stop bits time in the other modes during serial
reception. However the restrictions of SM2 apply to this bit. This bit can be cleared
only by software.
6
SM1
5
SM2
4
REN
3
TB8
2
RB8
1
TI
0
RI
SM1, SM0: Mode Select bits:
MODE
SM1
SM0
DESCRIPTION
LENGTH
BAUD RATE
0
1
2
3
0
0
1
1
0
1
0
1
Synchronous
Asynchronous
Asynchronous
Asynchronous
8
10
11
11
Tclk divided by 4 or 12
Variable
Tclk divided by 32 or 64
Variable
SERIAL DATA BUFFER
Bit:
7
6
5
4
3
2
1
0
SBUF.7
SBUF.6
SBUF.5
SBUF.4
SBUF.3
SBUF.2
SBUF.1
SBUF.0
Mnemonic: SBUF
Address: 99h
相關PDF資料 |
PDF描述 |
|---|---|
| W79E802ADG | 8-BIT MICROCONTROLLER |
| W79E802ASG | 8-BIT MICROCONTROLLER |
| W79E803 | 8-BIT MICROCONTROLLER |
| W79E803A | 8-BIT MICROCONTROLLER |
| W79E803ADG | 8-BIT MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W79E802ADG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E802ASG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803ADG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
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