PIC32MX320F032H_11 Datasheet, PDF (115/214 Pages) Microchip Technology – High-Performance, General Purpose and USB, 32-bit Flash Microcontrollers

PIC32MX3XX/4XX
19.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
Note
1: This data sheet summarizes the features
of the PIC32MX3XX/4XX 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) of 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 PIC32MX3XX/4XX 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 1.2 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 76 bps to 20 Mbps at 80
MHz
• 4-level-deep First-In-First-Out (FIFO) Transmit
Data Buffer
• 4-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
Baud Rate Generator
IrDA^®
Hardware Flow Control
UARTx Receiver
UARTx Transmitter
BCLKx
UxRTS
UxCTS
UxRX
UxTX
© 2011 Microchip Technology Inc.
DS61143H-page 115