XR21V1410IL16-F Datasheet, PDF (3/28 Pages) Exar Corporation – 1-CH FULL-SPEED USB UART

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PIN DESCRIPTIONS
Pin Description
NAME
16-QFN
PIN #
UART Signals
RX
10
TX
9
GPIO0/RI#/RWK#
8
GPIO1/CD#
7
GPIO2/DSR#
6
GPIO3/DTR#
5
GPIO4/CTS#
4
GPIO5/RTS#
3
XR21V1410
1-CH FULL-SPEED USB UART
TYPE
DESCRIPTION
I
UART Channel A Receive Data or IR Receive Data. This pin has an
internal pull-up resistor. Internal pull-up resistor is not disabled during
suspend mode.
O
UART Channel A Transmit Data or IR Transmit Data.
I/O _{General purpose I/O or UART Ring-Indicator input (active low) or}
Remote Wakeup input. See “Section 1.5.11, Remote Wakeup” on
page 10.
This pin has an internal pull-up resistor which is disabled during suspend
mode. If using this GPIO as an input, an external pull-up resistor is
required to minimize the device power consumption in the suspend
mode.
I/O _{General purpose I/O or UART Carrier-Detect input (active low). This pin}
has an internal pull-up resistor which is disabled during suspend mode.
If using this GPIO as an input, an external pull-up resistor is required to
minimize the device power consumption in the suspend mode.
I/O _{General purpose I/O or UART Data-Set-Ready input (active low). See}
”Section 1.5.5, Automatic DTR/DSR Hardware Flow Control”
on page 9.
This pin has an internal pull-up resistor which is disabled during suspend
mode. If using this GPIO as an input, an external pull-up resistor is
required to minimize the device power consumption in the suspend
mode.
I/O _{General purpose I/O or UART Data-Terminal-Ready output (active low).}
See ”Section 1.5.5, Automatic DTR/DSR Hardware Flow Con-
trol” on page 9.
This pin has an internal pull-up resistor which is disabled during suspend
mode. If using this GPIO as an input, an external pull-up resistor is
required to minimize the device power consumption in the suspend
mode.
I/O _{General purpose I/O or UART Clear-to-Send input (active low). See}
”Section 1.5.4, Automatic RTS/CTS Hardware Flow Control”
on page 8.
This pin has an internal pull-up resistor which is disabled during suspend
mode. If using this GPIO as an input, an external pull-up resistor is
required to minimize the device power consumption in the suspend
mode.
I/O _{General purpose I/O or UART Request-to-Send output (active low).}
See ”Section 1.5.4, Automatic RTS/CTS Hardware Flow Con-
trol” on page 8.
This pin has an internal pull-up resistor which is disabled during suspend
mode. If using this GPIO as an input, an external pull-up resistor is
required to minimize the device power consumption in the suspend
mode.
3