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XR21B1424IV64TR-F Datasheet(PDF) 8 Page - Exar Corporation |
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XR21B1424IV64TR-F Datasheet(HTML) 8 Page - Exar Corporation |
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8 / 64 page  XR21B1424 8 / 64 exar.com/XR21B1424 Rev 1C Type: I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain 56 GPIOD3/DTRD# I/O General purpose I/O, or UART Data-Terminal-Ready push-pull output (active low). Defaults to GPIO input with internal pull-up resistor. See “Automatic DTR/DSR Hardware Flow Control” on page 17. 57 GPIOD2/DSRD# I/O General purpose I/O, or UART Data-Set-Ready input (active low). Defaults to GPIO input with internal pull-up resistor. See “Automatic DTR/DSR Hardware Flow Control” on page 17. 58 GPIOD1/CDD# I/O General purpose I/O, or UART Carrier-Detect input (active low). Defaults to GPIO input with internal pull-up resistor. 59 GPIOD0/RID#/RWKD# I/O General purpose I/O, or UART Ring-Indicator input (active low), or Remote Wakeup input. Defaults to GPIO input with internal pull-up resistor. Wakeup signaling to the USB host is sent when a falling edge is detected. See “Remote Wakeup” on page 10. 60 GPIOA9/RXTA I/O General purpose I/O, or UART receive data indicator. Defaults to GPIO input with internal pull- up resistor. See “TXT and RXT Pins” on page 19. When configured as receive indicator, this pin will toggle at ~10Hz intervals while the UART is receiving data. 61 GPIOA8/TXTA I/O General purpose I/O, or UART transmit data indicator. Defaults to GPIO input with internal pull- up resistor. See “TXT and RXT Pins” on page 19. When configured as transmit indicator, this pin will toggle at ~10Hz intervals while the UART is transmitting data. 62 GPIOA7/RS485A I/O General purpose I/O, or auto RS-485 half-duplex control. Defaults to GPIO input with internal pull-up resistor. See “Multidrop mode with address matching” on page 18. 63 GPIOA6/CLKA I/O General purpose I/O, or clock or pulse output. Defaults to GPIO input with internal pull-up resistor. See “Programmable Output Clock” on page 16. 64 TXA O UART Transmit Data. Pin No. Pin Name Type Description |
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Similar Description - XR21B1424IV64TR-F |
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