PIC32MX1XX Datasheet, PDF (179/320 Pages) Microchip Technology – 32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

PIC32MX1XX/2XX
18.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
Note 1: This data sheet summarizes the features
of the PIC32MX1XX/2XX 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)” (DS61107) 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.
The UART module is one of the serial I/O modules
available in PIC32MX1XX/2XX 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 sup-
ports 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 38 bps to 10 Mbps at 40
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 18-1 illustrates a simplified block diagram of the
UART.
FIGURE 18-1:
UART SIMPLIFIED BLOCK DIAGRAM
Baud Rate Generator
IrDA^®
Hardware Flow Control
UARTx Receiver
UxRTS/BCLKx
UxCTS
UxRX
UARTx Transmitter
UxTX
Note: Not all pins are available for all UART modules. Refer to the device-specific pin diagram for more information.
© 2011-2012 Microchip Technology Inc.
Preliminary
DS61168D-page 179