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参数资料
| 型号： | T83C5101ZZZ-3ZSIL |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDIP24 |
| 封装： | DIP-24 |
| 文件页数： | 13/52页 |
| 文件大小： | 701K |
| 代理商： | T83C5101ZZZ-3ZSIL |
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20
Rev. F - 12 March, 2001
T87C5101
T83C5101/02
7.5. T8xC5101/02 Serial I/O Port
The serial I/O port in the T8xC5101/02 family is compatible with the serial I/O port in the 80C52. 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:
Framing error detection
Automatic address recognition
7.5.1. 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 7).
Figure 7. 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 7.) 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) (SMOD0 = 1)
SCON (98h)
PCON (87h)
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