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ST20-GP1 bảng dữ liệu(PDF) 72 Page - STMicroelectronics

tên linh kiện ST20-GP1
Giải thích chi tiết về linh kiện  GPS PROCESSOR
PDF  116 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST20-GP1 bảng dữ liệu(HTML) 72 Page - STMicroelectronics

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13 UART interface (ASC)
The UART interface, also referred to as the Asynchronous Serial Controller (ASC), provides serial
communication between the ST20 device and other microcontrollers, microprocessors or external
peripherals.
The ASC supports full-duplex asynchronous communication, where both the transmitter and the
receiver use the same data frame format and the same baud rate. Data is transmitted on the
transmit data output pin (TXD) and received on the receive data input pin (RXD).
Figure 13.1 Block diagram of the ASC
CPU
clock
Transmit buffer
register (TxBuffer)
Receive buffer
register (RxBuffer)
Internal bus
Transmit shift
register
Receive shift
register
TXD
MUX
0
1
Sampling
RXD
Transmitter
empty interrupt
Error
interrupt
Receive buffer
full interrupt
Serial port control
Shift clock
Clock
LoopBack
Mode
StopBits
Baud rate timer
Run
Reload register
RxEnable
ParityOdd
4 -input OR
gate
ASC_interrupt
Transmit buffer
empty interrupt



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