XR21B1422IL40-0A Datasheet, PDF (7/60 Pages) Exar Corporation – Enhanced 2-Ch Full-Speed USB UART

XR21B1422
Pin No.
Pin Name
38
TXA
39
GPIOA6/CLKA
40
GPIOA7/RS485A
Type
O
I/O
I/O
Description
UART Transmit Data.
General purpose I/O, or clock or pulse output. Defaults to GPIO input with internal pull-up
resistor. See “Programmable Output Clock” on page 15.
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 17.
Type: I = Input, O = Output, I/O = Input/Output, PWR = Power, OD = Open-Drain
© 2014 Exar Corporation
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