64GA106 datasheet(193/330 Pages) MICROCHIP

193 / 330 page

 2010 Microchip Technology Inc.

DS39905E-page 193

PIC24FJ256GA110 FAMILY

17.0

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,

RS-232 and RS-485 interfaces. The module also

supports a hardware flow control option with the UxCTS

and UxRTS pins, and also 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 UxCTS and

UxRTS Pins

• Fully Integrated Baud Rate Generator with 16-Bit

Prescaler

• Baud Rates Ranging from 1 Mbps to 15 bps 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 17-1. The UART module consists of these key

important hardware elements:

• Baud Rate Generator

• Asynchronous Transmitter

• Asynchronous Receiver

FIGURE 17-1:

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).

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 pins before use. Please see

Section 10.4 “Peripheral Pin Select”

for more information.

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