The Universal Asynchronous Receiver/Transmitter
(UART) module in this device contains the following features:
- Programmable baud-rate generator allowing speeds up to 7.8125Mbps for regular speed (divide by 16)
and 15.625Mbps for high speed (divide by 8)
- Separate 16-deep
and 8-bit wide transmit (TX) and receive (RX) FIFOs to
reduce CPU interrupt service loading
- Programmable FIFO
length, including 1-byte deep operation providing
conventional double-buffered interface
- FIFO trigger
levels of ⅛, ¼, ½, ¾, and ⅞
- Standard
asynchronous communication bits for start, stop, and
parity
- Line-break
generation and detection
- Fully
programmable serial interface characteristics
- 5, 6, 7, or 8 data bits
- Even, odd, stick, or no parity bit generation and
detection
- 1
or 2 stop bit generation
- IrDA serial-IR
(SIR) encoder and decoder providing
- Programmable use of IrDA SIR or UART
input/output
- Support of IrDA SIR encoder and decoder functions
for data rates up to 115.2kbps half-duplex
- Support of normal 3/16 and low-power (1.41 to
2.23μs) bit durations
- Programmable internal clock generator enabling
division of reference clock by 1 to 256 for
low-power mode bit duration
- EIA-485 9-bit
support
- Standard
FIFO-level and End-of-Transmission (EOT) interrupts
- Efficient
transfers using Micro
Direct Memory Access Controller (µDMA)
- Separate channels for transmit and receive
- Receive single request asserted when data is in
the FIFO; burst request asserted at programmed
FIFO level
- Transmit single request asserted when there is
space in the FIFO; burst request asserted at
programmed FIFO level
- CMCLK (125MHz maximum) is used
to generate the baud clock.