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參數(shù)資料
| 型號： | TS80C31X2-VLCR |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit CMOS Microcontroller ROMless |
| 中文描述： | 8-BIT, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數(shù)： | 12/40頁 |
| 文件大小： | 484K |
| 代理商： | TS80C31X2-VLCR |
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12
Rev. A - Mar. 19, 1999
Preliminary
TS80C31X2
6.3 TS80C31X2 Serial I/O Port
The serial I/O port in the TS80C31X2 is compatible with the serial I/O port in the 80C31.
It provides both synchronous and asynchronous communication modes. It operates as an Universal Asynchronous
Receiver and Transmitter (UART) in three full-duplex modes (Modes 1, 2 and 3). Asynchronous transmission and
reception can occur simultaneously and at different baud rates
Serial I/O port includes the following enhancements:
G
Framing error detection
G
Automatic address recognition
6.3.1 Framing Error Detection
Framing bit error detection is provided for the three asynchronous modes (modes 1, 2 and 3). To enable the framing
bit error detection feature, set SMOD0 bit in PCON register (See Figure 4).
Figure 4. Framing Error Block Diagram
When this feature is enabled, the receiver checks each incoming data frame for a valid stop bit. An invalid stop
bit may result from noise on the serial lines or from simultaneous transmission by two CPUs. If a valid stop bit
is not found, the Framing Error bit (FE) in SCON register (See Table 5.) bit is set.
RI
TI
RB8
TB8
REN
SM2
SM1
SM0/FE
IDL
PD
GF0
GF1
POF
-
SMOD0
SMOD1
To UART framing error control
SM0 to UART mode control (SMOD = 0)
Set FE bit if stop bit is 0 (framing error) (SMOD = 1)
SCON (98h)
PCON (87h)
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相關(guān)代理商/技術(shù)參數(shù) |
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| TS80C31X2-VLEB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit CMOS Microcontroller ROMless |
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