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 2009-2013 Microchip Technology Inc. DS70000582E-page 1

HIGHLIGHTS

This section of the manual contains the following major topics:

1.0 Introduction ....................................................................................................................... 2

2.0 Control Registers .............................................................................................................. 4

3.0 UART Baud Rate Generator ........................................................................................... 12

4.0 UART Configuration........................................................................................................ 14

5.0 UART Transmitter ........................................................................................................... 15

6.0 Data Bit Detection ........................................................................................................... 20

7.0 UART Receiver ............................................................................................................... 21

8.0 Using the UART for 9-Bit Communication ...................................................................... 26

9.0 Other Features of the UART ........................................................................................... 29

10.0 UART Operation with DMA ............................................................................................. 31

11.0 UART Operation During CPU Sleep and Idle Modes ..................................................... 33

12.0 Operation of UxCTS and UxRTS Control Pins ............................................................... 35

13.0 Infrared Support.............................................................................................................. 37

14.0 LIN/J2602 Support.......................................................................................................... 40

15.0 Smart Card Support ........................................................................................................ 42

16.0 Registers Map................................................................................................................. 51

17.0 Related Application Notes............................................................................................... 52

18.0 Revision History .............................................................................................................. 53

Universal Asynchronous Receiver Transmitter (UART)

dsPIC33/PIC24 Family Reference Manual

DS70000582E-page 2  2009-2013 Microchip Technology Inc.

This document supersedes the following PIC24 and dsPIC Family Reference Manual sections:

1.0 INTRODUCTION

The Universal Asynchronous Receiver Transmitter (UART) module is one of the serial I/O

modules available in the dsPIC33 and PIC24 device families. The UART is a full-duplex,

asynchronous communication channel that communicates with peripheral devices and personal

computers, using protocols such as RS-232, RS-485, LIN/J2602 and IrDA

®. The module also

supports the hardware flow control option with the UxCTS and UxRTS pins and includes the IrDA

encoder and decoder.

The primary features of the UART module are as follows:

• 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 auto-baud feature

• Hardware flow control option with the UxCTS and UxRTS pins (These pins are not

available on all devices. Refer to the “Universal Asynchronous Receiver Transmitter

(UART)” chapter of the specific device data sheet for availability.)

• Fully integrated Baud Rate Generator (BRG) with 16-bit prescaler

• Baud rates up to 17.5 Mbps

• Four-deep First-In First-Out (FIFO) transmit data buffer

• Four-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

• IrDA encoder and decoder logic

• LIN/J2602 bus support (v1.3 and 2.0)

• 16x baud clock output for external IrDA encoder/decoder support

• Optional ISO 7816 Smart Card support

Note: This family reference manual section is meant to serve as a complement to device

data sheets. Depending on the device variant, this manual section may not apply to

all dsPIC33 and PIC24 devices.

Please consult the note at the beginning of the “Universal Asynchronous

Receiver Transmitter (UART)” chapter in the current device data sheet to check

whether this document supports the device you are using.

Device data sheets and family reference manual sections are available for download

from the Microchip worldwide web site at: http://www.microchip.com

DS Number Section Number Title

DS39708 21 UART: PIC24F Family Reference Manual

DS70232 17 UART: PIC24H Family Reference Manual

DS70582 17 UART: dsPIC33E/PIC24E Family Reference Manual

DS70066 19, 34 UART: dsPIC30F Family Reference Manual

DS70188 17 UART: dsPIC33F/PIC24H Family Reference Manual

DS70582 17 UART: dsPIC33E/PIC24E Family Reference Manual

 2009-2013 Microchip Technology Inc. DS70000582E-page 3

UART

A simplified block diagram of the UART is illustrated in Figure 1-1. The UART module consists

of the following key hardware elements:

• Baud Rate Generator

• Asynchronous Transmitter

• Asynchronous Receiver

Figure 1-1: UARTx Simplified Block Diagram

Baud Rate Generator

UxRX

Hardware Flow Control

UARTx Receiver

UARTx Transmitter UxTX

UxCTS

UxRTS

BCLKx

ISO 7816 Support

IrDA®

Produktspecifikationer

Varumärke:	Microchip
Kategori:	Inte kategoriserad
Modell:	PIC24F08KM202
Färg på produkten:	Zwart
Förpackningens vikt:	15000 g
Användarmanual:	Ja
Ljudformat som stöds:	AAC, MP3, WAV, WMA
Videoformat som stöds:	ASF, AVI, DIVX, MKV, MP4, MPEG, MPG, WMV
Ethernet LAN:	Ja
Medföljande kablar:	AC, USB
Integrerad minneskortläsare:	Ja
Kompatibla minneskort:	SD, SDHC
Inbyggd hårddisk:	Nee
Ljudsystem:	Dolby Digital 5.1, Dolby Digital Plus, Dolby True HD, DTS Digital Surround, DTS- HD High Resolution Audio
Snabbstartsguide:	Ja
Garantikort:	Ja
Förpackningsmått (BxDxH):	564 x 400 x 389 mm
Antal Ethernet LAN (RJ-45)-portar:	1
Genomsnittlig effekt:	440 W
Strömförbrukning (i standby):	0.5 W
Antal USB-anslutningar:	1
FM-radio:	Ja
USB-version:	2.0
3D:	Ja
Bildformat som stöds:	GIF, JPEG XR, JPG, PNG
HDMI-version:	1.4
Integrerad TV-tuner:	Nee
Inbyggda ljudavkodare:	Dolby Digital 5.1, Dolby Digital Plus, Dolby TrueHD
Equalizerinställningar:	Ja
Audio Return Channel (ARC):	Ja
Videouppskalning:	Ja
Ljudutgångskanaler:	2.1 kanalen
Diameter drivrutin subwoofer (imperiaal):	6.5 "
Progressiv skanning:	Ja
Kompositvideoutgång:	1
MP3-bitsnelheden:	32 - 320 Kbit/s
Ljudförbättrande teknik:	Ja
Karaoke:	Nee
Spela upp skivformat:	SVCD, VCD
AUX ingång:	Ja
Typ-av-optisk-enhet:	BD, BD-R, BD-RE, CD, CD-R, CD-RW, DVD, DVD+R, DVD+RW, DVD-R, DVD-RW
Antal förinställda kanaler:	40
FM-antenn:	Ja
Inklusive DVD-spelare/inspelare:	Blu-Ray speler
Inkluderar RDS-tuner:	Ja
Bildförbättring:	HD (720p, 1080i, 1080p/ 24fps), Progressive scan, Video upscaling, Rotate, Slideshow with music playback, Zoom
Total harmonisk distorsion (THD):	30 procent
Apple dockningskompatibilitet:	iPhone, iPod
Digitalt ljud optiskt in:	1
Antal HDMI-utgångar:	1
Subwoofertyp:	Passieve subwoofer
Subwooferns frekvensområde:	20 - 150 Hz
Subwoofer impedans:	3 Ohm
Trådlös subwoofer:	Ja
Fjärrkontroll ingår:	Ja
Digital ljudingång (koaxial):	1
Satellithögtalarimpedans:	5 Ohm
Wifi:	Ja
AC-ingångsspänning:	220-240 V
AC-ingångsfrekvens:	50 Hz
Strömförbrukning (typiskt):	85 W
Subwoofer maximal effekt:	200 W
Diameter woofer satellithögtalare:	6 "
Peak power satellithögtalare:	240 W
Satellithögtalares frekvensområde:	150 - 20000 Hz
Extra tillbehör:	2 x AAA Batteries, DCK3060 Dock for iPod/iPhone, FM antenna, Power cord, Quick start guide, Remote Control, Safety & Legal Leaflet, Trademarks Sheet, World Wide Warranty leaflet, WUB1110 Wi-Fi USB Adapter
EasyLink:	21:9 format subtitle support, Audio Return Channel, Automatic audio input mapping, Dynamic Lipsync, One touch play, One touch standby, Remote Control-Passthrough