M054ZBN Datasheet, PDF (47/68 Pages) List of Unclassifed Manufacturers – 32-BIT MICROCONTROLLER

NuMicro^™ M052/M054BN Data Sheet
Another alternate function of UART controllers is RS-485 9 bit mode function, and direction
control provided by RTS pin or can program GPIO (P0.3 for RTS0 and P0.1 for RTS1) to
implement the function by software. The RS-485 mode is selected by setting the UA_FUN_SEL
register to select RS-485 function. The RS-485 driver control is implemented by using the RTS
control signal from an asynchronous serial port to enable the RS-485 driver. In RS-485 mode,
many characteristics of the RX and TX are same as UART.
6.10.2 Features
 Full duplex, asynchronous communications
 Separate receive / transmit 16/16 bytes entry FIFO for data payloads
 Support hardware auto flow control/flow control function (CTS, RTS) and programmable
RTS flow control trigger level
 Programmable receiver buffer trigger level
 Support programmable baud-rate generator for each channel individually
 Support CTS wake up function
 Support 8 bit receiver buffer time out detection function
 Programmable transmitting data delay time between the last stop and the next start bit by
setting UA_TOR [DLY] register
 Support break error, frame error, parity error and receive / transmit buffer overflow detect
function
 Fully programmable serial-interface characteristics
 Programmable number of data bit, 5, 6, 7, 8 bit character
 Programmable parity bit, even, odd, no parity or stick parity bit generation and
detection
 Programmable stop bit, 1, 1.5, or 2 stop bit generation
 Support IrDA SIR function mode
 Support for 3/16 bit duration for normal mode
 Support LIN function mode
 Support LIN master/slave mode
 Support programmable break generation function for transmitter
 Support break detect function for receiver
 Support RS-485 function mode.
 Support RS-485 9bit mode
 Support hardware or software enable to program RTS pin to control RS-485
transmission direction directly
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Publication Release Date: Mar. 19, 2012
Revision V1.01