The DS90UB940TNKDRQ1 is a part of Texas Instruments' DS90UB940 family of devices. Specifically, the DS90UB940TNKDRQ1 is a FPD-Link III deserializer designed for automotive and industrial applications. It works as a receiver for high-speed data transmitted from a serializer over coaxial cables or differential pair wiring.
The DS90UB940TNKDRQ1 comes in a QFN (Quad Flat No-lead) package, typically with a 40-pin configuration. In terms of functionality, this device converts high-speed serial data into parallel data that can be used by a microcontroller or other digital devices. The specifications of the pins and their functions need to be described in great detail.
Pin Function Specifications and Circuit Principle Instructions
The pinout of the DS90UB940TNKDRQ1 device includes a variety of signals for Power , data input/output, ground, and various controls. It is essential to understand the function of each pin to implement the device correctly.
Pin Function Table (Detailed Description)Below is the detailed pinout list and description of the pins in the DS90UB940TNKDRQ1 device. This pinout is typically in a 40-pin QFN package.
Pin Number Pin Name Function Description 1 GND Ground. Provides the reference for all signals and returns current to the system. 2 VDD Power supply input. Voltage supply for the chip. Typically 3.3V or 5V. 3 AVDD Analog voltage supply for internal analog circuits. 4 RESET Active-low reset input. Used to reset the device. 5 SCL I2C serial Clock line. Used for communication with the microcontroller. 6 SDA I2C serial data line. Used for transmitting data to/from the device. 7 CSI_RX1P Input signal. Channel 1 positive differential signal from serializer. 8 CSI_RX1N Input signal. Channel 1 negative differential signal from serializer. 9 CSI_RX2P Input signal. Channel 2 positive differential signal from serializer. 10 CSI_RX2N Input signal. Channel 2 negative differential signal from serializer. 11 CSI_RX3P Input signal. Channel 3 positive differential signal from serializer. 12 CSI_RX3N Input signal. Channel 3 negative differential signal from serializer. 13 CSI_RX4P Input signal. Channel 4 positive differential signal from serializer. 14 CSI_RX4N Input signal. Channel 4 negative differential signal from serializer. 15 PCLK_IN Input pixel clock. The clock signal for timing data reception. 16 PCLK_OUT Output pixel clock. The clock signal for timing data output. 17 MIPI_CLK MIPI clock output. High-speed data transmission clock. 18 MIPI_DAT MIPI data output. High-speed data transmission line. 19 GPIO1 General-purpose I/O pin 1. Used for user-defined functions. 20 GPIO2 General-purpose I/O pin 2. Used for user-defined functions. 21 GPIO3 General-purpose I/O pin 3. Used for user-defined functions. 22 GPIO4 General-purpose I/O pin 4. Used for user-defined functions. 23 MUX_SEL MUX selection pin. Determines the configuration of internal signal routing. 24 TDO Test Data Out. Used for debug or testing purposes. 25 TDI Test Data In. Used for debug or testing purposes. 26 TMS Test Mode Select. Used for testing and debugging the device. 27 TCK Test Clock. Used for testing and debugging the device. 28 LVDS_PWR LVDS power supply input. 29 LVDS_GND LVDS ground. Ground for LVDS signaling. 30 VDDIO I/O voltage supply input. 31 VDDIO2 Second I/O voltage supply input for high-speed logic circuits. 32 CLAMP1 Clamp control signal 1. Used for maintaining signal integrity. 33 CLAMP2 Clamp control signal 2. Used for maintaining signal integrity. 34 AUX_CLK Auxiliary clock input. Used for additional clock signal requirements. 35 AUX_DAT Auxiliary data input/output. Used for additional data signaling. 36 VSYNC Vertical sync signal. Used for synchronization with the video data stream. 37 HSYNC Horizontal sync signal. Used for synchronization with the video data stream. 38 VREF Reference voltage for the device. Used for internal voltage regulation. 39 ESD_GND Ground pin for electrostatic discharge protection. 40 VDDIO3 Third I/O voltage supply input for other device peripherals.This table is a rough representation, so be sure to refer to the official datasheet from Texas Instruments for precise pinout information.
20 Common FAQs (In Q&A Format)
Q: What is the purpose of the DS90UB940TNKDRQ1 device? A: The DS90UB940TNKDRQ1 is a FPD-Link III deserializer used for converting high-speed serial data from an FPD-Link serializer into parallel data for microcontrollers or other devices.
Q: How does the DS90UB940TNKDRQ1 communicate with other devices? A: The device uses I2C for communication via the SDA and SCL pins, as well as high-speed serial data transmission through the CSI_RX pins.
Q: What voltage supply is required for the DS90UB940TNKDRQ1? A: The VDD pin typically requires a 3.3V or 5V power supply for proper operation.
Q: What are the functions of the CSIRX pins on the DS90UB940TNKDRQ1? A: The CSIRX pins receive high-speed differential data signals from the serializer, such as CSIRX1P, CSIRX1N, etc.
Q: How is the device reset? A: The DS90UB940TNKDRQ1 can be reset by applying an active-low signal to the RESET pin.
Q: What is the function of the PCLK pins? A: The PCLKIN pin is used for the input pixel clock, while the PCLKOUT pin outputs the pixel clock.
Q: What is the role of the GPIO pins? A: The GPIO pins can be used as general-purpose I/O for user-defined functions, such as signaling or control.
Q: How are the LVDS signals handled by the DS90UB940TNKDRQ1? A: The device has dedicated LV DSP WR and LVDSGND pins for providing power and ground connections for LVDS signaling.
Q: How does the device manage signal integrity? A: The CLAMP1 and CLAMP2 pins help in maintaining signal integrity by controlling internal clamps.
Q: What additional clock sources can the DS90UB940TNKDRQ1 use? A: The device can use an AUX_CLK pin for additional clock inputs.
Q: How is the device's power supply configured? A: The device requires VDD, AVDD, and VDDIO pins for different voltage supplies: core, analog, and I/O respectively.
Q: Can the DS90UB940TNKDRQ1 handle video synchronization? A: Yes, the device handles vertical and horizontal synchronization signals through the VSYNC and HSYNC pins.
Q: What is the significance of the TDO, TDI, TMS, and TCK pins? A: These pins are for JTAG debugging and testing functionality.
Q: Can the DS90UB940TNKDRQ1 be used for automotive applications? A: Yes, the DS90UB940TNKDRQ1 is designed specifically for automotive and industrial applications requiring high-speed data transmission.
**Q: What are the *GPIO1*, *GPIO2*, *GPIO3*, and *GPIO4* pins used for?** A: These pins are general-purpose I/O pins that can be configured for various functions depending on the application.
**Q: What is the importance of the *MIPICLK* and MIPIDAT pins?** A: These pins are used for MIPI (Mobile Industry Processor Interface) signaling for high-speed data transmission.
Q: What kind of voltage regulation is supported? A: The VREF pin provides a reference voltage for the device's internal regulation.
Q: Is there any protection against electrostatic discharge (ESD)? A: Yes, the ESD_GND pin provides protection against electrostatic discharge.
Q: How is the clock signal distributed in the system? A: The MIPICLK pin provides a clock signal for high-speed data transfer, while the PCLKOUT pin handles pixel clock synchronization.
Q: What should I do if I need to test or debug the DS90UB940TNKDRQ1? A: You can use the TDO, TDI, TMS, and TCK pins to perform JTAG testing and debugging.
This covers the most critical aspects of the device, but always consult the official datasheet for precise implementation and any additional design requirements.
