XR21V1414IM48 EXAR [Exar Corporation], XR21V1414IM48 Datasheet - Page 6

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

XR21V1414
4-CH FULL-SPEED USB UART
Pin Description
UART Channel D Signals
USB Interface Signals
I2C Interface Signals
GPIOD2/DSRD#
GPIOD3/DTRD#
GPIOD4/CTSD#
GPIOD5/RTSD#
GPIOD1/CDD#
GPIOD0/RID#
USBD+
USBD-
N
RXD
TXD
SDA
AME
48-QFN
P
39
38
37
34
48
47
46
43
42
35
IN
3
#
T
OD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
YPE
O
I
UART Channel D 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 D 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.
USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up
resistor.
USB port differential data minus.
I
required if an EEPROM is connected. An optional external I
can be used to store default configurations upon power-up including the
USB Vendor ID and Device ID.
If an EEPROM is not used, this pin can be used with the SCL pin to select
the Remote Wake-up and Power modes. An external pull-up or pull-down
resistor is required. See
2
C-controller data input/output (open-drain). 1K pull-up resistor is
6
Table 1
D
ESCRIPTION
.
2
C EEPROM
REV. 1.0.0