PIC24FJ64GA104 FAMILY
• Fully Integrated Baud Rate Generator with 16-Bit
Prescaler
17.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
• Baud Rates Ranging from 1 Mbps to 15 bps at
16 MIPS
• 4-Deep, First-In-First-Out (FIFO) Transmit Data
Buffer
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, refer to the
“PIC24F Family Reference Manual”,
Section 21. “UART” (DS39708).
• 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
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules available
in the PIC24F 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.
• 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 shown in
Figure 17-1. The UART module consists of these key
important hardware elements:
The primary features of the UART module are:
• Baud Rate Generator
• Full-Duplex, 8 or 9-Bit Data Transmission through
the UxTX and UxRX pins
• Asynchronous Transmitter
• Asynchronous Receiver
• Even, Odd or No Parity Options (for 8-bit data)
• One or Two Stop bits
• Hardware Flow Control Option with UxCTS and
UxRTS pins
FIGURE 17-1:
UART SIMPLIFIED BLOCK DIAGRAM
Baud Rate Generator
IrDA®
UxRTS/BCLKx
UxCTS
Hardware Flow Control
UARTx Receiver
UxRX
UxTX
UARTx Transmitter
Note:
The UART inputs and outputs must all be assigned to available RPn pins before use. Please see
Section 10.4 “Peripheral Pin Select (PPS)” for more information.
2010 Microchip Technology Inc.
DS39951C-page 183
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