Changes

UART (universal asynchronous receiver/transmitter) convert converts parallel data from system bus to serial data through a port. At the destination, a second UART re-assembles this data. Each UART contains a shift register which is the fundamental method of conversion between serial and parallel forms. External signals may be of many different forms, IGEPv2 can handle RS232 and RS485 but not all pads have these standards, Omap UART peripheral use CMOS level voltage (1V8). Omap 3530 have three UARTs and Omap 3730 (DM3730) have four UARTs. Omap UART peripheral use four signals:

- UART TX: Transmit signal.<br>- UART RX: Receive signal.<br>- UART RTS: Ready to send, used in RS485 and unidirectional&nbsp; communication. <br>- UART CTS: Clear to send, used in RS485 and unidirectional&nbsp; communication.    The speed transmion data is mesured in bauds per second, for example Kernel console params uses 115200 bps (equivalent to 14 Kbytes per second). The speed can set up from 300 bauds to 3686400 bauds. <br>

- 64-byte FIFO for receiver and 64-byte FIFO for transmitter<br> - Programmable interrupt trigger levels for FIFOs<br> - Configurable data format<br> - Data bit: 5, 6, 7, or 8 bits<br> - Parity bit: Even, odd, none<br> - Stop-bit: 1, 1.5, 2 bit(s)<br> - Flow control: Hardware (RTS/CTS) or software (XON/XOFF)<br> - Supports DMA Mode for all UARTs.<br> - The speed transmion data is mesured in bauds per second, for example Kernel console params uses 115200 bps (equivalent to 14 Kbytes per second). The speed can set up from 300 bauds to 3686400 bauds.