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XR16L2550IM Datasheet(PDF) 4 Page - Exar Corporation |
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XR16L2550IM Datasheet(HTML) 4 Page - Exar Corporation |
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4 / 45 page  XR16L2550 áç áç áç áç LOW VOLTAGE DUART WITH 16-BYTE FIFO REV. 1.0.0 4 TXRDYB# - 12 6 O UART channel B Transmitter Ready (active low). The out- put provides the TX FIFO/THR status for transmit channel B. If it is not used, leave it unconnected. RXRDYB# - 23 18 O UART channel B Receiver Ready (active low). This output provides the RX FIFO/RHR status for receive channel B. If it is not used, leave it unconnected. MODEM OR SERIAL I/O INTERFACE TXA 5 13 7 O UART channel A Transmit Data. If it is not used, leave it unconnected. RXA 4 11 5 I UART channel A Receive Data. Normal receive data input must idle at logic 1 condition. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. RTSA# 23 36 33 O UART channel A Request-to-Send (active low) or general purpose output. This output must be asserted prior to using auto RTS flow control, see EFR[6], MCR[1] and IER[6]. If it is not used, leave it unconnected. CTSA# 25 40 38 I UART channel A Clear-to-Send (active low) or general purpose input. It can be used for auto CTS flow control, see EFR[7] and IER[7]. This input should be connected to VCC when not used. DTRA# - 37 34 O UART channel A Data-Terminal-Ready (active low) or general purpose output. If it is not used, leave it uncon- nected. DSRA# - 41 39 I UART channel A Data-Set-Ready (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. CDA# - 42 40 I UART channel A Carrier-Detect (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. RIA# - 43 41 I UART channel A Ring-Indicator (active low) or general purpose input. This input should be connected to VCC when not used. This input has no effect on the UART. OP2A# - 35 32 O Output Port 2 Channel A - The output state is defined by the user and through the software setting of MCR[3]. INTA is set to the active mode and OP2A# output to a logic 0 when MCR[3] is set to a logic 1. INTA is set to the three state mode and OP2A# to a logic 1 when MCR[3] is set to a logic 0. This output should not be used as a gen- eral output else it will disturb the INTA output functionality. If it is not used at all, leave it unconnected. TXB 6 14 8 O UART channel B Transmit Data. If it is not used, leave it unconnected. RXB 3 10 4 I UART channel B Receive Data. Normal receive data input must idle at logic 1 condition. If it is not used, tie it to VCC or pull it high via a 100k ohm resistor. Pin Description NAME 32-QFN PIN # 44-PLCC PIN # 48-TQFP PIN # TYPE DESCRIPTION |
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Similar Description - XR16L2550IM |
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