PIC32MX440F256H-80I Datasheet, PDF (427/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
19.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
Note:
This data sheet summarizes the features of
the PIC32MX3XX/4XX family of devices. It
is not intended to be a comprehensive refer-
ence source. Refer to the “PIC32MX Family
Reference Manual” (DS61132) for a
detailed description of this peripheral.
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules avail-
able in PIC32MX3XX/4XX family devices. The UART is
a full-duplex, asynchronous communication channel
that communicates with peripheral devices and per-
sonal computers through protocols such as RS-232,
RS-485, LIN 1.2 and IrDA^®. The module also supports
the hardware flow control option, with UxCTS and
UxRTS pins, and also includes the 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 1.2 protocol support
• IrDA encoder and decoder with 16x baud clock
output for external IrDA encoder/decoder support
Figure 19-1 shows 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
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 425