HT32F22366 datasheet(13/56 Pages) HOLTEK

13 / 56 page

Rev. 1.00

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Universal Synchronous Asynchronous Receiver Transmitter –

USART

▆

Supports both asynchronous and clocked synchronous serial communication modes

▆

Asynchronous operating baud rate up to (fPCLK/16) MHz and synchronous operating rate up to

(fPCLK/8) MHz

▆

Full duplex communication

▆

Fully programmable serial communication characteristics including:

● Word length: 7, 8, or 9-bit character

● Parity: Even, odd, or no-parity bit generation and detection

● Stop bit: 1 or 2 stop bit generation

● Bit order: LSB-first or MSB-first transfer

▆

Error detection: Parity, overrun and frame error

▆

Auto hardware flow control mode – RTS, CTS

▆

IrDA SIR encoder and decoder

▆

RS485 mode with output enable control

▆

FIFO Depth: 16 × 9 bits for both receiver and transmitter

The Universal Synchronous Asynchronous Receiver Transceiver, USART, provides a flexible

full duplex data exchange using synchronous or asynchronous transfer. The USART is used to

translate data between parallel and serial interfaces, and is commonly used for RS232 standard

communication. The USART peripheral function supports four types of interrupt including Line

Status Interrupt, Transmitter FIFO Empty Interrupt, Receiver Threshold Level Reaching Interrupt

and Time Out Interrupt. The USART module includes a 16-byte transmitter FIFO, (TX_FIFO) and

a 16-byte receiver FIFO (RX_FIFO). The software can detect a USART error status by reading the

Line Status Register, LSR. The status includes the type and the condition of transfer operations as

well as several error conditions resulting from Parity, Overrun, Framing and Break events.

Universal Asynchronous Receiver Transmitter – UART

▆

Asynchronous serial communication operating baud-rate up to (fPCLK/16) MHz

▆

Full duplex communication

▆

Fully programmable serial communication characteristics including:

● Word length: 7, 8 or 9-bit character

● Parity: Even, odd or no-parity bit generation and detection

● Stop bit: 1 or 2 stop bit generation

● Bit order: LSB-first or MSB-first transfer

▆

Error detection: Parity, overrun and frame error

The Universal Asynchronous Receiver Transceiver, UART, provides a flexible full duplex data

exchange using asynchronous transfer. The UART is used to translate data between parallel and

serial interfaces, and is commonly used for RS232 standard communication. The UART peripheral

function supports Line Status Interrupt. The software can detect a UART error status by reading

the Line Status Register, LSR. The status includes the type and the condition of transfer operations

as well as several error conditions resulting from Parity, Overrun, Framing and Break events.

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