XR21V1410IL16-F

XR21V1410 1-CH FULL-SPEED USB UART JUNE 2018 REV. 1.4.1 GENERAL DESCRIPTION FEATURES  USB 2.0 Compliant, Full-Speed (12 Mbps) The XR21V1410 is an enhanced Universal Asynchronous Receiver and Transmitter (UART) with a USB interface. The USB interface is fully compliant to Full Speed USB 2.0 specification that supports 12 Mbps USB data transfer rate. The USB interface also supports USB suspend, resume and remote wakeup operations. ■ Supports USB suspend, resume and remote wakeup operations  ± 5 kV HBM ESD protection on USB data pins  ± 2 kV HBM ESD protection on all other pins  Enhanced UART Features The XR21V1410 operates from an internal 48MHz clock therefore no external crystal/oscillator is required as in previous generation UARTs. With the fractional baud rate generator, any baud rate can accurately be generated using the internal 48MHz clock. The large 128-byte TX FIFO and 384-byte RX FIFO of the XR21V1410 helps to optimize the overall data throughput for various applications. The automatic transceiver direction control feature simplifies both the hardware and software for half-duplex RS-485 applications. If required, the multidrop (9-bit) mode with automatic half-duplex transceiver control feature further simplifies typical multidrop RS-485 applications. The XR21V1410 operates from a single 2.97 to 3.63 volt power supply and has 5V tolerant inputs. The XR21V1410 is available in a 16-pin QFN package. ■ UART data rates up to 12 Mbps ■ Fractional Baud Rate Generator ■ 128 byte TX FIFO ■ 384 byte RX FIFO ■ 7, 8 or 9 data bits ■ 1 or 2 stop bits ■ Odd, even, mark, space, or no parity ■ Automatic Hardware (RTS/CTS or DTR/DSR) Flow Control ■ Automatic Software (Xon/Xoff) Flow Control ■ Multidrop mode ■ Auto RS-485 Half-Duplex Control ■ Half-Duplex mode ■ Selectable GPIO or Modem I/O  Internal 48 MHz clock  Single 3.3V power supply  5V tolerant GPIO inputs  16-pin QFN package  Virtual COM Port WHQL certified drivers The XR21V1410 uses the native OS CDC-ACM driver or a MaxLinear supplied custom driver. MaxLinear provides WHQL/HCK-certified software drivers for Windows XP, Vista, 7, 8, 8.1 and 10 as well as software drivers for Windows CE, Linux and Mac OS X. Full source code is available. ■ Windows XP, Vista, Win7 and Win8 APPLICATIONS ■ Windows CE 4.2, 5.0, 6.0, 7.0  Portable Appliances  External Converters (dongles)  Battery-Operated Devices  Cellular Data Devices  Factory Automation and Process Controls  Industrial applications ■ Linux ■ Mac 1 XR21V1410 1-CH FULL-SPEED USB UART REV. 1.4.1 FIGURE 1. XR21V1410 BLOCK DIAGRAM Internal 48MHz Oscillator USBD+ USBD- SDA SCL Fractional BRG USB Slave Interface Internal Status and Control Registers I2 C Interface 3.3V VCC GND 128- byte TX FIFO TX 384- byte RX FIFO RX GPIOs/ Modem IO GPIO5/RTS#/RS485 GPIO4/CTS# GPIO3/DTR# GPIO2/DSR# GPIO1/CD# GPIO0/RI#/RWK# UART GND LOWPOWER GPIO5/RTS#/RS485 GPIO4/CTS# GND USBD+ USBD- VCC FIGURE 2. PIN OUT ASSIGNMENT 16 15 14 13 12 SCL 1 16-Pin 11 SDA 2 QFN 10 RX 3 9 TX 4 GPIO0/RI#/RWK# GPIO2/DSR# GPIO1/CD# GPIO3/DTR# 5 6 7 8 ORDERING INFORMATION(1) PART NUMBER XR21V1410IL16-F XR21V1410IL16TR-F XR21V1410IL-0A-EB XR21V1410IL-0B-EB XR21V1410IL-0C-EB OPERATING TEMPERATURE RANGE LEAD-FREE PACKAGE Tray Tape and Reel XR21V1410 Evaluation Board - RS-232 and RS-485 capable XR21V1410 Evaluation Board - RS-232 capable XR21V1410 Evaluation Board - RS-485 capable Yes(2) -40°C to +85°C 16-pin QFN NOTES: 1. 2. PACKAGING METHOD Refer to www.exar.com/XR21V1410 for most up-to-date Ordering Information. Visit www.exar.com for additional information on Environmental Rating. 2 XR21V1410 1-CH FULL-SPEED USB UART REV. 1.4.1 PIN DESCRIPTIONS 16-QFN PIN # TYPE RX 10 I UART Channel A Receive Data. This pin has an internal pull-up resistor.  Internal pull-up resistor is not disabled during suspend mode. TX 9 O UART Channel A Transmit Data. GPIO0/RI#/RWK# 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. GPIO1/CD# 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. GPIO2/DSR# 6 I/O General purpose I/O or UART Data-Set-Ready input (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. GPIO3/DTR# 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 ”Section 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 RS485 half-duplex control. See “Section 1.5.5, Automatic RTS/CTS Hardware 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. USBD+ 15 I/O USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up. USBD- 14 I/O USB port differential data minus. NAME DESCRIPTION UART Signals USB Interface Signals 3 XR21V1410 1-CH FULL-SPEED USB UART NAME 16-QFN PIN # REV. 1.4.1 TYPE DESCRIPTION I2C Interface Signals SDA 11 I/O I2C-controller data input/output (open-drain). An optional external I2C OD EEPROM can be used to store default configurations upon power-up including the USB Vendor ID and Device ID. See Table 3. A pull-up resistor (typically 4.7 to 10k Ohms) is required. 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 Table 2 SCL 12 I/O I2C-controller serial input clock. An optional external I2C EEPROM can be OD used to store default configurations upon power-up including the USB Vendor ID and Device ID. See Table 3. A pull-up resistor (typically 4.7 to 10k Ohms) is required. If an EEPROM is not used, this pin can be used with the SDA pin to select the Remote Wake-up and Power modes. An external pull-up or pull-down resistor is required. See Table 2 Miscellaneous Signals LOWPOWER 2 O Low power status output. The LOWPOWER pin will be asserted whenever it is not safe to draw the amount of current from VBUS power requested in the Device Max Power field of the Configuration Descriptor. The LOWPOWER pin will behave differently for a low power device and a high power device. Low-power device (