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XR28V384IM48TR-F Datasheet(PDF) 4 Page - Exar Corporation |
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XR28V384IM48TR-F Datasheet(HTML) 4 Page - Exar Corporation |
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4 / 42 page  XR28V384 4 REV. 1.0.0 3.3V QUAD LPC UART WITH 128-BYTE FIFO RTSC# / PS_CONF_KEY0/ RS485 23 O UART Channel C Request-to-Send (active low) or general purpose output or Automatic RS485 Half-Duplex control pin. See ’Section 1.4.4, Auto RS-485 Half-Duplex Control’. This pin has an internal pull-up resistor and is sampled upon power-up or reset. See Table 1 ’UART Power On Configuration’. DTRC# / PS_WDT 24 O UART Channel C Data-Terminal-Ready (active low) or general purpose output. This pin has an internal pull-up resistor and is sampled upon power-up or reset. The registers can later be modified by the software. See Table 1 ’UART Power On Configuration’. RXC 25 I UART Channel C Receive data. Normal receive data input must idle at logic 1 condition. This input should be connected to VCC or GND when not used. TXC / PS_3E8_IRQC 26 O UART Channel C Transmit Data. The TXC signal will be a logic 1 during reset or idle (no data). If it is not used, leave it unconnected. This pin has an internal pull-up resistor and is sampled upon power-up or reset. This will determine the default register settings for UART channel C. The regis- ters can later be modified by the software. See Table 1 ’UART Power On Con- figuration’. CDC# 27 I UART Channel C Carrier-Detect (active low) or general purpose input. This input should be connected to VCC or GND when not used. RIC# 28 I UART Channel C Ring-Indicator (active low) or general purpose input. This input should be connected to VCC or GND when not used. CTSB# 31 I UART Channel B Clear-to-Send (active low) or general purpose input. This input should be connected to VCC or GND when not used. DSRB# 32 I UART Channel B Data-Set-Ready (active low) or general purpose input. This input should be connected to VCC or GND when not used. RTSB# / PS_CONF_KEY1/ RS485 33 O UART Channel B Request-to-Send (active low) or general purpose output or aut- matic RS485 Half-Duplex control pin. See ’Section 1.4.4, Auto RS-485 Half- Duplex Control’. This pin has an internal pull-up resistor and is sampled upon power-up or reset See Table 1 ’UART Power On Configuration’. DTRB# / PS_2E0_IRQB 34 O UART Channel B Data-Terminal-Ready (active low) or general purpose output. This pin has an internal pull-up resistor and is sampled upon power-up or reset. This will determine the default register settings for UART channel B. The regis- ters can later be modified by the software. See Table 1 ’UART Power On Con- figuration’. RXB 35 I UART Channel B Receive data. Normal receive data input must idle at logic 1 condition. This input should be connected to VCC or GND when not used. TXB / PS_2F8_IRQB 36 O UART Channel B Transmit Data. The TXB signal will be a logic 1 during reset or idle (no data). If it is not used, leave it unconnected. This pin has an internal pull-up resistor and is sampled upon power-up or reset. This will determine the default register settings for UART Channel B. The regis- ters can later be modified by the software. See Table 1 ’UART Power On Con- figuration’. CDB# 37 I UART Channel B Carrier-Detect (active low) or general purpose input. This input should be connected to VCC or GND when not used. Pin Description NAME 48-TQFP PIN# TYPE DESCRIPTION |
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