Datasheet

 2011-2012 Microchip Technology Inc. DS70652E-page 209
dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
18.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules
available in the dsPIC33FJ16(GP/MC)101/102 and
dsPIC33FJ32(GP/MC)101/102/104 device family. The
UART is a full-duplex asynchronous system that can
communicate with peripheral devices, such as
personal computers, LIN/J2602, 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 1 Mbps to 6 bps at
16x mode at 16 MIPS
• Baud Rates Ranging from 4 Mbps to 24.4 bps at
4x mode 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
• 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 18-1. The UART module consists of
these key hardware elements:
• Baud Rate Generator
• Asynchronous Transmitter
• Asynchronous Receiver
FIGURE 18-1: UART SIMPLIFIED BLOCK DIAGRAM
Note 1: This data sheet summarizes the features
of the dsPIC33FJ16(GP/MC)101/102
and dsPIC33FJ32(GP/MC)101/102/104
family 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
available from the Microchip 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
UxCTS
IrDA
®