DSPIC33FJ32GS608 datasheet(273/416 Pages) MICROCHIP

273 / 416 page

 2009 Microchip Technology Inc.

Preliminary

DS70591B-page 273

dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610

20.0 UNIVERSAL ASYNCHRONOUS

RECEIVER TRANSMITTER

(UART)

The Universal Asynchronous Receiver Transmitter

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

available in the dsPIC33FJ32GS406/606/608/610 and

dsPIC33FJ64GS406/606/608/610 device families. 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-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

• Support for DMA

A simplified block diagram of the UART module is

shown in Figure 20-1. The UART module consists of

these key hardware elements:

• Baud Rate Generator

• Asynchronous Transmitter

• Asynchronous Receiver

FIGURE 20-1:

UART SIMPLIFIED BLOCK DIAGRAM

Note 1: This data sheet summarizes the features

of the dsPIC33FJ32GS406/606/608/610

and

dsPIC33FJ64GS406/606/608/610

families 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) in the “dsPIC33F/PIC24H

Family Reference Manual”, which is avail-

able from the Microchip web site

(www.microchip.com).

2: Some registers and associated bits

described in this section may not be avail-

able 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

IrDA®

UxCTS

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