XR21V1414 Datasheet, PDF (4/26 Pages) Exar Corporation – 4-CH FULL-SPEED USB UART

XR21V1414
4-CH FULL-SPEED USB UART
PIN DESCRIPTIONS
REV. 1.0.0
Pin Description
NAME
48-QFN
PIN #
TYPE
DESCRIPTION
UART Channel A Signals
RXA
31
TXA
30
GPIOA0/RIA#
21
GPIOA1/CDA#
20
GPIOA2/DSRA#
17
GPIOA3/DTRA#
16
GPIOA4/CTSA#
7
GPIOA5/RTSA#
6
I
UART Channel A Receive Data or IR Receive Data. This pin has an inter-
nal 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). This pin}
has an internal pull-up resistor. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the 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. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
I/O _{General purpose I/O or UART Data-Set-Ready input (active low). This pin}
has an internal pull-up resistor. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
I/O _{General purpose I/O or UART Data-Terminal-Ready output (active low).}
This pin has an internal pull-up resistor. Internal pull-up resistor is disabled
during suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
I/O _{General purpose I/O or UART Clear-to-Send input (active low). This pin}
has an internal pull-up resistor. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
I/O _{General purpose I/O or UART Request-to-Send output (active low). This}
pin has an internal pull-up resistor. Internal pull-up resistor is disabled dur-
ing suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
UART Channel B Signals
RXB
9
TXB
8
GPIOB0/RIB#
15
GPIOB1/CDB#
14
I
UART Channel B Receive Data or IR Receive Data. This pin has an inter-
nal pull-up resistor. Internal pull-up resistor is not disabled during suspend
mode.
O _{UART Channel B Transmit Data or IR Transmit Data.}
I/O _{General purpose I/O or UART Ring-Indicator input (active low). This pin}
has an internal pull-up resistor. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the 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. Internal pull-up resistor is disabled during
suspend mode. If using this GPIO as an input, a pull-up resistor is
required to minimize the power consumption in the suspend mode.
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