ST20-GP1 datasheet(72/116 Pages) STMICROELECTRONICS

No. de pieza	ST20-GP1

Descripción Electrónicos	GPS PROCESSOR

PDF	116 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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ST20-GP1

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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

Receive buffer

Internal bus

Transmit shift

Receive shift

TXD

MUX

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

ST20-GP1 Datasheet(PDF) 72 Page - STMicroelectronics

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