=== UART ===
UART (universal asynchronous receiver/transmitter) 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 IGEPv2 can handle RS232 and Omap 3730 (DM3730) RS485 but not all pads have four UARTs. these standards, Omap UART peripheral use four signals: CMOS level voltage (1V8).
*UART TX: Transmit signalOmap 3530 have three UARTs and Omap 3730 (DM3730) have four UARTs.*UART RX: Receive signal.*UART RTS: Ready to sendUART4 is not avaliable in IGEPv2, used in RS485 and hardware flow control. *UART CTSbut IGEP MODULE can use it: Clear to send, used in RS485 and hardware flow control.<br>
Some Omap UART caracteristics*gpmc_wait3/uart4_rx - J8 pin: UART4 Receive data (input) *gpmc_wait2/uart4_tx - K8 pin: UART4 Transmit data (output)
*64-byte FIFO for receiver and 64-byte FIFO for transmitter*Programmable interrupt trigger levels for FIFOs*Configurable data format*Data bit: 5, 6, 7, or 8 bits*Parity bit: Even, odd, none*Stop-bit: 1, 1.5, 2 bit(s)*Flow controlOmap UART peripheral uses four signals: Hardware (RTS/CTS) or software (XON/XOFF)*Supports [http://en.wikipedia.org/wiki/Direct_memory_access DMA] Mode for all UARTs.*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.
'''NOTE*UART TX:''' UART4 (avaliable Transmit signal. *UART RX: Receive signal. *UART RTS: Ready to send, used in DM3730) is not avaliable RS485 and hardware flow control.*UART CTS: Clear to send, used in IGEPv2RS485 and hardware flow control. But IGEP COM MODULE can use it, it is avaliable on:<br>
Omap UART characteristics: *64-byte FIFO for receiver and 64-byte FIFO for transmitter *Programmable interrupt trigger levels for FIFOs *Configurable data format *Data bit: 5, 6, 7, or 8 bits *Parity bit: Even, odd, none *gpmc_wait3/uart4_rx Stop- J8 pinbit: UART4 Receive data 1, 1.5, 2 bit(inputs) *gpmc_wait2Flow control: Hardware (RTS/uart4_tx - K8 pinCTS) or software (XON/XOFF) *Supports [http: UART4 Transmit //en.wikipedia.org/wiki/Direct_memory_access DMA] Mode for all UARTs. *The speed transmion data is mesured in bauds per second, for example: Kernel console params uses 115200 bps (outputequivalent to 14 Kbytes per second). The speed can set up from 300 bauds to 3686400 bauds.
More information:
*[http://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter http://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter]
