XR16M890IL32-0C Datasheet, PDF (11/63 Pages) Exar Corporation – UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS

XR16M890
REV. 1.0.0
UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS
1.2 Serial Interface
The M890 is typically used with RS-232, RS-485 and IR transceivers. The following figure shows typical
connections from the UART to the different transceivers. For more information on RS-232 and RS-485/422
transceivers, go to www.exar.com or send an e-mail to [e-mail].
FIGURE 7. XR16M890 TYPICAL SERIAL INTERFACE CONNECTIONS
VCC_UART
UART
TX
RX
DTR#
RTS#
CTS#
DSR#
CD#
R I#
GND
VCC_UART
R S -232
T ransceiver
T1 IN
R1OUT
T 2 IN
T 3 IN
R2OUT
R3OUT
R4OUT
R5OUT
GND
R S -232 Fu ll-M od em S erial Interface
VCC_UART
UART
TX
RX
RTS#
DTR#
CTS#
DSR#
CD#
RI #
VCC_UART
RS-485
Transceiver _TX+
DI
Full-duplex
RO
TX-
NC
VCC_UART ^VCC_UART
NC
DE
RE#
RX+
RX-
GND
RS-485 Full-Duplex Serial Interface
11