PIC24FJ128GA310 datasheet(241/406 Pages) MICROCHIP

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DS39996F-page 241

PIC24FJ128GA310 FAMILY

18.0

UNIVERSAL ASYNCHRONOUS

RECEIVER TRANSMITTER

(UART)

The Universal Asynchronous Receiver Transmitter

(UART) module is one of the serial I/O modules available

in the PIC24F device family. The UART is a full-duplex,

asynchronous system that can communicate with

peripheral devices, such as personal computers,

LIN/J2602, RS-232 and RS-485 interfaces. The module

also supports a hardware flow control option with the

UxCTS and UxRTS pins, and includes an IrDA® encoder

and decoder.

The primary features of the UART module are:

• Full-Duplex, 8 or 9-Bit Data Transmission through

the UxTX and UxRX Pins

• Even, Odd or No Parity Options (for 8-bit data)

• One or Two Stop bits

• Hardware Flow Control Option with the UxCTS

and UxRTS Pins

• Fully Integrated Baud Rate Generator with 16-Bit

Prescaler

• Baud Rates Ranging from 15 bps to 1 Mbps at

16 MIPS

• 4-Deep, First-In-First-Out (FIFO) Transmit Data

Buffer

• 4-Deep FIFO Receive Data Buffer

• Parity, Framing and Buffer Overrun Error Detection

• Support for 9-bit mode with Address Detect

(9th bit = 1)

• Transmit and Receive Interrupts

• Loopback mode for Diagnostic Support

• Support for Sync and Break Characters

• Supports Automatic Baud Rate Detection

•IrDA® Encoder and Decoder Logic

• 16x Baud Clock Output for IrDA Support

A simplified block diagram of the UART is shown in

Figure 18-1. The UART module consists of these key

important hardware elements:

• Baud Rate Generator

• Asynchronous Transmitter

• Asynchronous Receiver

FIGURE 18-1:

UART SIMPLIFIED BLOCK DIAGRAM

Note:

This data sheet summarizes the features of

this group of PIC24F devices. It is not

intended to be a comprehensive reference

source. For more information, refer to the

“PIC24F

Family

Reference

Manual”

Section 21. “UART”

(DS39708). The

information in this data sheet supersedes

the information in the FRM.

UxRX

IrDA®

Hardware Flow Control

UARTx Receiver

UARTx Transmitter

UxTX

UxCTS

UxRTS/BCLKx

Baud Rate Generator

Note:

The UART inputs and outputs must all be assigned to available RPn/RPIn pins before use. See Section 11.4

“Peripheral Pin Select (PPS)”

for more information.

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