DSPIC33FJMC202ESS datasheet(193/330 Pages) MICROCHIP

193 / 330 page

DS70283K-page 193

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

19.0 UNIVERSAL ASYNCHRONOUS

RECEIVER TRANSMITTER

(UART)

The Universal Asynchronous Receiver Transmitter

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

available

the

dsPIC33FJ32MC202/204

and

dsPIC33FJ16MC304 device family. The UART is a

full-duplex

asynchronous

system

that

can

communicate with peripheral devices, such as

personal computers, LIN, and 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-bit 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 10 Mbps to 38 bps at 40

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

• A separate interrupt for all UART error conditions

• Loopback mode for diagnostic support

• Support for sync and break characters

• Support for automatic baud rate detection

•IrDA® encoder and decoder logic

• 16x baud clock output for IrDA® support

A simplified block diagram of the UART module is

shown in Figure 19-1. The UART module consists of

these key hardware elements:

• Baud Rate Generator

• Asynchronous Transmitter

• Asynchronous Receiver

FIGURE 19-1:

UART SIMPLIFIED BLOCK DIAGRAM

Note 1: This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 family of devices. It

is not intended to be a comprehensive

reference source. To complement the

information in this data sheet, refer to

Section 17. “UART” (DS70188) of the

“dsPIC33F/PIC24H Family Reference

Manual”, which is available on the Micro-

chip web site (www.microchip.com).

2: Some registers and associated bits

described in this section may not be

available on all devices. Refer to

Section 4.0 “Memory Organization” in

this data sheet for device-specific register

and bit information.

UxRX

Hardware Flow Control

UART Receiver

UART Transmitter

UxTX

Baud Rate Generator

UxRTS/BCLK

IrDA®

UxCTS

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