PIC24F04KA201 datasheet(135/224 Pages) MICROCHIP

135 / 224 page

Preliminary

DS39937B-page 133

PIC24F04KA201 FAMILY

17.0

UNIVERSAL ASYNCHRONOUS

RECEIVER TRANSMITTER

(UART)

The Universal Asynchronous Receiver Transmitter

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

able in this 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. This module also

supports a hardware flow control option with the U1CTS

and U1RTS pins, and also includes an IrDA® encoder

and decoder.

The primary features of the UART module are:

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

through the U1TX and U1RX pins

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

• One or Two Stop bits

• Hardware Flow Control Option with U1CTS and

U1RTS pins

• Fully Integrated Baud Rate Generator (IBRG) 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 displayed in

Figure 17-1. The UART module consists of these

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 on the

Universal

Asynchronous

Receiver

Transmitter, refer to the “PIC24F Family

Reference Manual”

, Section 21. “UART”

(DS39708).

U1RX

IrDA®

Hardware Flow Control

UART1 Receiver

UART1 Transmitter

U1TX

U1CTS

U1RTS

U1BCLK

Baud Rate Generator

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