XR21V1414IM48-F

XR21V1414 4-CH FULL-SPEED USB UART DECEMBER 2013 REV. 1.3.0 GENERAL DESCRIPTION FEATURES The XR21V1414 (V1414) is an enhanced 4-channel USB Universal Asynchronous Receiver and Transmitter (UART). 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. • USB 2.0 Compliant, Full-speed (12 Mbps) The V1414 operates from an internal 48MHz clock therefore no external crystal/oscillator is required like 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 V1414 helps to optimize the overall data throughput for various applications. If required, the multidrop mode and automatic RS-485 half-duplex direction control feature further simplifies typical multidrop RS-485 applications. The V1414 operates from a single 2.97 to 3.63 volt power supply and has 5V tolerant inputs. The V1414 is available in a 48-pin TQFP package. WHQL certified software drivers for Windows 2000, XP, Vista, 7, 8, and CE, as well as Linux and Mac are supported for the XR21V1414. APPLICATIONS • Portable Appliances • External Converters (dongles) • Battery-Operated Devices • Cellular Data Devices • Factory Automation and Process Controls • Industrial applications ■ 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 Features of each UART ■ 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 inputs • 48-pin TQFP package • Virtual COM Port WHQL certified drivers ■ Windows 2000, XP Vista, Win7 and Win8 ■ Windows CE 4.2, 5.0, 6.0, 7.0 ■ Linux ■ Mac Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 FIGURE 1. XR21V1414 BLOCK DIAGRAM 3.3V VCC GND 3.3V to 1.2V Regulator Fractional BRG Internal Status and Control Registers DATA+ DATA- SDA SCL USB Slave Interface 128-byte TX FIFO TXA 384-byte RX FIFO RXA GPIOs/ Modem IO GPIOA5/RTSA#/RS485A GPIOA4/CTSA# GPIOA3/DTRA# GPIOA2/DSRA# GPIOA1/CDA# GPIOA0/RIA# UART Channel A I2C Interface Internal 48MHz Oscillator 2 UART Channel B (Same as Ch A) TXB RXB GPIOB[5:0]/ModemIO UART Channel C (Same as Ch A) TXC RXC GPIOC[5:0]/ModemIO UART Channel D (Same as Ch A) TXD RXD GPIOD[5:0]/ModemIO XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 GPIOD3/DTRD# GPIOD4/CTSD# GPIOD5/RTSD#/RS485D VCC VCC USBD+ USBDGND GND RXD TXD GPIOD0/RID# FIGURE 2. PIN OUT ASSIGNMENT 1 48 47 46 45 44 43 42 41 40 39 38 37 36 2 35 3 34 4 33 32 5 6 7 XR21V1414 48-TQFP 31 30 8 29 9 28 10 27 11 26 12 25 13 14 15 16 17 18 19 20 21 22 23 24 SCL SDA GPIOD1/CDD# VCC GND RXA TXA GPIOC0/RIC# GPIOC1/CDC# GPIOC2/DSRC# GPIOC3/DTRC# GPIOC4/CTSC# GPIOB2/DSRB# GPIOB1/CDB# GPIOB0/RIB# GPIOA3/DTRA# GPIOA2/DSRA# VCC GND GPIOA1/CDA# GPIOA0/RIA# TXC RXC GPIOC5/RTSC#/RS485C GND LOW POW ER GPIOD2/DSRD# GND VCC GPIOA5/RTSA#/RS485A GPIOA4/CTSA# TXB RXB GPIOB5/RTSB#/RS485B GPIOB4/CTSB# GPIOB3/DTRB# ORDERING INFORMATION PART NUMBER PACKAGE OPERATING TEMPERATURE RANGE XR21V1414IM48-F 48-pin TQFP -40°C to +85°C Active XR21V1414IM48TR-F 48-pin TQFP -40°C to +85°C Active NOTE: TR = Tape and Reel, F = Green / RoHS 3 DEVICE STATUS XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 PIN DESCRIPTIONS Pin Description NAME 48-QFN PIN # TYPE DESCRIPTION UART Channel A Signals RXA 31 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. TXA 30 O UART Channel A Transmit Data or IR Transmit Data. GPIOA0/RIA#/ RWKA# 21 I/O UART Channel A general purpose I/O or UART Ring-Indicator input (active low) or Remote Wakeup Input (See ”Section 1.5.12, USB Suspend” on page 14.). 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 power consumption in the suspend mode. GPIOA1/CDA# 20 I/O UART Channel A 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 power consumption in the suspend mode. GPIOA2/DSRA# 17 I/O UART Channel A 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 13. 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 power consumption in the suspend mode. GPIOA3/DTRA# 16 I/O UART Channel A 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 13. 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 power consumption in the suspend mode. GPIOA4/CTSA# 7 I/O UART Channel A 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 13. 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 power consumption in the suspend mode. GPIOA5/RTSA#/ RS485A 6 I/O UART Channel A 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 Hardware Flow Control” on page 13. 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 power consumption in the suspend mode. 9 I UART Channel B Receive Data or IR Receive Data. This pin has an internal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode. UART Channel B Signals RXB 4 XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 Pin Description NAME 48-QFN PIN # TYPE TXB 8 O UART Channel B Transmit Data or IR Transmit Data. GPIOB0/RIB#/ RWKB# 15 I/O UART Channel B general purpose I/O or UART Ring-Indicator input (active low) or Remote Wakeup Input (See ”Section 1.5.12, USB Suspend” on page 14.). 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 power consumption in the suspend mode. GPIOB1/CDB# 14 I/O UART Channel B 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 power consumption in the suspend mode. GPIOB2/DSRB# 13 I/O UART Channel B 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 13. 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 power consumption in the suspend mode. GPIOB3/DTRB# 12 I/O UART Channel B 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 13. 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 power consumption in the suspend mode. GPIOB4/CTSB# 11 I/O UART Channel B 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 13. 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 power consumption in the suspend mode. GPIOB5/RTSB#/ RS485B 10 I/O UART Channel B 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 Hardware Flow Control” on page 13. 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 power consumption in the suspend mode. RXC 23 I UART Channel C Receive Data or IR Receive Data. This pin has an internal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode. TXC 22 O UART Channel C Transmit Data or IR Transmit Data. GPIOC0/RIC#/ RWKC# 29 I/O UART Channel C general purpose I/O or UART Ring-Indicator input (active low) or Remote Wakeup Input (See ”Section 1.5.12, USB Suspend” on page 14.). 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 power consumption in the suspend mode. DESCRIPTION UART Channel C Signals 5 XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 Pin Description NAME 48-QFN PIN # TYPE DESCRIPTION GPIOC1/CDC# 28 I/O UART Channel C 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 power consumption in the suspend mode. GPIOC2/DSRC# 27 I/O UART Channel C 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 13. 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 power consumption in the suspend mode. GPIOC3/DTRC# 26 I/O UART Channel C 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 13. 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 power consumption in the suspend mode. GPIOC4/CTSC# 25 I/O UART Channel C 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 13. 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 power consumption in the suspend mode. GPIOC5/RTSC#/ RS485C 24 I/O UART Channel C 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 Hardware Flow Control” on page 13. 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 power consumption in the suspend mode. RXD 39 I UART Channel D Receive Data or IR Receive Data. This pin has an internal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode. TXD 38 O UART Channel D Transmit Data or IR Transmit Data. GPIOD0/RID#/ RWKD# 37 I/O UART Channel D general purpose I/O or UART Ring-Indicator input (active low) or Remote Wakeup Input (See ”Section 1.5.12, USB Suspend” on page 14.). 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 power consumption in the suspend mode. GPIOD1/CDD# 34 I/O UART Channel D 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 power consumption in the suspend mode. UART Channel D Signals 6 XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 Pin Description NAME 48-QFN PIN # TYPE DESCRIPTION GPIOD2/DSRD# 3 I/O UART Channel D 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 13. 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 power consumption in the suspend mode. GPIOD3/DTRD# 48 I/O UART Channel D 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 13. 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 power consumption in the suspend mode. GPIOD4/CTSD# 47 I/O UART Channel D 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 13. 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 power consumption in the suspend mode. GPIOD5/RTSD#/ RS485D 46 I/O UART Channel D 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 Hardware Flow Control” on page 13. 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 power consumption in the suspend mode. USBD+ 43 I/O USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up resistor. USBD- 42 I/O USB port differential data minus. SDA 35 I/O OD I2C-controller data input/output (open-drain). An optional external I2C 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 resisitor (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 36 I/O OD I2C-controller serial input clock. An optional external I2C 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 resisitor (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. USB Interface Signals I2C Interface Signals 7 XR21V1414 4-CH FULL-SPEED USB UART REV. 1.3.0 Pin Description NAME 48-QFN PIN # TYPE DESCRIPTION 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. Miscellaneous Signals LOWPOWER • Low-power device (