XR21V1410IL-0C-EB Datasheet, PDF (3/30 Pages) Exar Corporation – 1-CH FULL-SPEED USB UART

REV. 1.4.0
PIN DESCRIPTIONS
XR21V1410
1-CH FULL-SPEED USB UART
NAME
UART Signals
RX
TX
16-QFN
PIN #
TYPE
DESCRIPTION
10
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.
9
O _{UART Channel A Transmit Data or IR Transmit Data.}
GPIO0/RI#/RWK#
GPIO1/CD#
GPIO2/DSR#
GPIO3/DTR#
8
I/O _{General purpose I/O or UART Ring-Indicator input (active low) or Remote}
Wakeup input. See “Section 1.5.13, Remote Wakeup” on page 11.
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.
7
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.
6
I/O _{General purpose I/O or UART Data-Set-Ready input (active low). See ”Sec-}
tion 1.5.6, 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.
5
I/O _{General purpose I/O or UART Data-Terminal-Ready output (active low). See}
”Section 1.5.6, 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.
GPIO4/CTS#
4
I/O _{General purpose I/O or UART Clear-to-Send input (active low). See ”Sec-}
tion 1.5.5, Automatic RTS/CTS 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.
GPIO5/RTS#/RS485
3
I/O _{General purpose I/O or UART Request-to-Send output (active low) or auto RS-}
485 half-duplex control. See “Section 1.5.5, Automatic RTS/CTS Hard-
ware Flow Control” on page 9 or “Section 1.5.8, Auto RS-485 Half-
Duplex Control” 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.
USB Interface Signals
USBD+
15
USBD-
14
I/O _{USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up.}
I/O _{USB port differential data minus.}
3