XR21V1414IM48 EXAR [Exar Corporation], XR21V1414IM48 Datasheet - Page 4

• Manufacturer Part Number: XR21V1414IM48
• Description: 4-CH FULL-SPEED USB UART
• Manufacturer: EXAR [Exar Corporation]

XR21V1414
4-CH FULL-SPEED USB UART
PIN DESCRIPTIONS
Pin Description
UART Channel A Signals
UART Channel B Signals
GPIOA2/DSRA#
GPIOA3/DTRA#
GPIOA4/CTSA#
GPIOA5/RTSA#
GPIOA1/CDA#
GPIOB1/CDB#
GPIOA0/RIA#
GPIOB0/RIB#
N
RXA
TXA
RXB
TXB
AME
48-QFN
P
31
30
21
20
17
16
15
14
IN
7
6
9
8
#
T
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
YPE
O
O
I
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.
UART Channel A Transmit Data or IR Transmit Data.
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.
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.
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.
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.
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.
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 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.
UART Channel B Transmit Data or IR Transmit Data.
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.
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.
4
D
ESCRIPTION
REV. 1.0.0