Datasheet

 2012-2013 Microchip Technology Inc. DS60001185C-page 207
PIC32MX330/350/370/430/450/470
19.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
The UART module is one of the serial I/O modules
available in PIC32MX330/350/370/430/450/470 family
devices. The UART is a full-duplex, asynchronous
communication channel that communicates with
peripheral devices and personal computers through
protocols, such as RS-232, RS-485, LIN and IrDA
®
.
The module also supports the hardware flow control
option, with 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
• Even, Odd or No Parity options (for 8-bit data)
• One or two Stop bits
• Hardware auto-baud feature
• Hardware flow control option
• Fully integrated Baud Rate Generator (BRG) with
16-bit prescaler
• Baud rates ranging from 76 bps to 25 Mbps at
100
MHz
• 8-level deep First-In-First-Out (FIFO) transmit
data buffer
• 8-level deep FIFO receive data buffer
• Parity, framing and buffer overrun error detection
• Support for interrupt-only on address detect 
(9th bit = 1)
• Separate transmit and receive interrupts
• Loopback mode for diagnostic support
• LIN Protocol support
• IrDA encoder and decoder with 16x baud clock
output for external IrDA encoder/decoder support
Figure 19-1 illustrates a simplified block diagram of the
UART.
FIGURE 19-1: UART SIMPLIFIED BLOCK DIAGRAM
Note 1: This data sheet summarizes the features
of the PIC32MX330/350/370/430/450/
470 family of devices. It is not intended to
be a comprehensive reference source.
To complement the information in this
data sheet, refer to Section 21.
“Universal Asynchronous Receiver
Transmitter (UART)” (DS60001107) in
the “PIC32 Family Reference Manual”,
which is available from the Microchip web
site (
www.microchip.com/PIC32).
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.
Baud Rate Generator
UxRX
Hardware Flow Control
UARTx Receiver
UARTx Transmitter
UxTX
UxCTS
UxRTS/BCLKx
IrDA
®
Note: Not all pins are available for all UART modules. Refer to the device-specific pin diagram for more information.