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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： | 55/87頁 |
| 文件大小： | 818K |
| 代理商： | W79E201A16PN |
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W79E201
Publication Release Date: December 16, 2004
- 55 -
Revision A2
This mode is similar to Mode 2 in all respects, except that the baud rate is programmable. The user
must first initialize the Serial related SFR SCON before any communication can take place. This
involves selection of the Mode and baud rate. The Timer 1 should also be initialized if modes 1 and 3
are used. In all four modes, transmission is started by any instruction that uses SBUF as a destination
register. Reception is initiated in Mode 0 by the condition RI = 0 and REN = 1. This will generate a
clock on the TxD pin and shift in 8 bits on the RxD pin. Reception is initiated in the other modes by the
incoming start bit if REN = 1. The external device will start the communication by transmitting the start
bit.
SBUF
RB8
Transmit Shift Register
Receive Shift Register
TX SHIFT
PAROUT
D8
Internal
Data Bus
Internal
Data
Bus
TXD
RXD
Serial Port
Interrupt
SMOD =
TCLK
RCLK
SAMPLE
Write to
SBUF
TX START
SOUT
0
1
0
1
TI
1
0
PARIN
STOP
START
LOAD
CLOCK
Read
SBUF
Timer 2
Overflow
Timer 1
Overflow
TX CLOCK
RI
SERIAL
CONTROLLER
RX CLOCK
LOAD
SBUF
RX START
RX SHIFT
2
16
1-TO-0
DETECTOR
BIT
DETECTOR
16
CLOCK
SIN
D8
TB8
0
1
Serial Port Mode 3
Table 10. Serial Ports Modes
SM1
SM0
Mode
Type
Baud Clock
Frame
Size
Start
Bit
Stop
Bit
9th
Function
bit
0
0
0
Synch.
4 or 12 T
CLKS
8 bits
No
No
None
0
1
1
Asynch.
Timer 1 or 2
10 bits
1
1
None
1
0
2
Asynch.
32 or 64 T
CLKS
11 bits
1
1
0, 1
1
1
3
Asynch.
Timer 1 or 2
11 bits
1
1
0, 1
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