The Kynix Components

I.Description74LS138 is a 3-line to 8-line decoder/demultiplexer. The chip is designed to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. The three enable pins of chip (in which Two active-low and one active-high) reduce the need for external gates or inverters when expanding.CatalogI. DescriptionII. Digital Voltmeter CircuitFAQOrdering & QuantityII. Digital Voltmeter CircuitWe use AD574 and AT89C2051 to form a high-precision digital voltmeter. The schematic diagram is shown in Figure 1. AD574  is a 12-bit successive comparison A/D converter with 12 data lines in total. P1 of AT89C2051  is directly connected to the high 8-bit data line of AD574,  The low 4-bit data line of AD574  is directly connected with the upper half 4-bit p1.4-p1.7 of single-chip microcomputer. Data reading is based on the control line of a single-chip microcomputer,  P3.5 is connected to AD574  byte short period control line (A0). P3.4 is connected to read conversion data control pin. And P3.7 is directly connected with the terminal of indicating working status (STS). Such structure determines that it can only be 8-bit output, so the data mode selection end can be directly grounded. AT89C2051  has only 15  I / O  port wires, 11 of which are used above, and only 4 of them are left. The output data is output through the serial port of the single-chip microcomputer.  and an external 74LS164  (serial in and parallel out) decoder is connected for expansion. At the same time, the data displayed is 4 bits, and the remaining 2 port lines still can not meet the requirements. A 74LS138 decoder is needed to gate the address of the display LED.Here we use the input mode of the 10V range. Pin13 of AD574  is the input terminal of the measured voltage. Because only one AD574  conversion chip is used, the CS terminal can be directly grounded. The converter uses ±12V power supply voltage and the working voltage is +5V.74LS164 is a serial input and parallel output decoder,  The BCD serial code output by AT89C2051 through the serial port is decoded by 74LS164  and output as a seven-segment  BCD code, which is directly connected to a-g of the LED, and the data lines of the four LEDs are connected one by one. LED digital tube uses a common anode type. The address code output by 74LS138 is connected to the common terminal of the LED via a transistor 2SA1015  (PNP). The display of the four-digit LED is a time-sharing strobe through the address line, which is our commonly used dynamic scanning display method.It is worth mentioning that in the dynamic scanning display mode, the frequency of dynamic scanning has certain requirements. If the frequency is too low, the LED will flicker. If the frequency is too high, the lighting time of each LED is too short, and the brightness of the LED is too low. It can’t be seen clearly with the naked eye. So it is generally appropriate to take about 10ms. This requires that when writing a program, a certain LED should be on and kept for a certain period of time. The program often uses the call delay subroutine.FAQWhat type of applications is 74LS138 designed to be used?High-performance memory-decoding or data-routing applicationsHow many pins does 74LS138 reduce the need for external gates or inverters when expanding?Three enable pinsWhat is a 74LS164?A serial input and parallel output decoder.What is the difference between 74hc138 and 74LS138?Both have the same function. 74HC138 is made of high-speed CMOS process, with low power consumption, high output, low level and wide range.74LS138 adopts the early bipolar process, and its driving capability is relatively larger.What is the functional difference between 74ls138 decoder and 74ls148？74ls138 is a 3-8 wire decoder/multiplexer, 74ls148 is an 8-3 wire octal priority encoder.One is decoding and the other is encoding. Opposite effectWhat's the difference between 74LS138D and 74LS138N？Those two are the same chip, D is SOP package, N is DIP package.What are the output characteristics of 74LS138 decoder？Under the premise that the enable terminals S1 (active high), S2 (active low), and S3 (active low) are valid at the same time, only one output terminal is low at a time (the rest are high);If the enable terminal is invalid, the output is all high level.What do the letters and numbers in 74ls138 stand for？74ls138 is a 3-8-line decoder. The number 74 represents the 74 series of the 54/74 series, and the 74 series has an operating temperature of 0 degrees to 70 degrees. LS is a series, representing the low-power Schottky series. 138 is the variety code.What’s the working principle of 74ls138?74LS138 working principle① When one strobe terminal (E1) is high level, and the other two strobe terminals (E2) and (E3) are low level, at the output terminals corresponding to Y0 to Y7, the binary code of address terminals (A0, A1, A2)  can be decoded at low level. For example: when A2A1A0=110, the Y6 output terminal outputs a low-level signal.②Using E1, E2 and E3, it can be cascaded to expand into a 24-line decoder; if an external inverter is connected, it can also be cascaded to expand into a 32-line decoder.③If one of the strobe terminals is used as a data input terminal, 74LS138 can also be used as a data distributor.④It can be used in 8086 decoding circuit to expand memory.

I. IntroductionDC motors are widely used in various fields due to their good speed regulation performance, large starting torque, and strong overload capacity. In recent years, the structure and control methods of DC  motors have undergone great changes. With computers entering the control field and the continuous emergence of new power electronic power components, PWM  (pulse width modulation) speed regulation has become a new way of DC motor speed regulation. And with the advantages of high switching frequency, stable low-speed operation, excellent dynamic performance, and high efficiency, it is widely used in DC motor speed regulation,  Therefore, this paper proposes the design of a DC  motor PWM  control system based on 80C196KC and L298N.CatalogI. IntroductionII. Principle of PWM Speed Control SystemIII. Control System Hardware Design3.1Introduction to Power Integrated Circuit L298N3.2 DC Motor Control System Hardware Circuit3.3 Anti-interference and Electromagnetic Compatibility DesignIV. Control System Software RealizationV. ConclusionFAQOrdering & QuantityII. Principle of PWM Speed Control System PWM, or pulse width modulation, refers to the use of the switching characteristics of high-power transistors to modulate a fixed voltage DC  power supply, which is turned on and off at a fixed frequency, and the length of the on and off time in a cycle is changed as needed. By changing the duty cycle of the voltage on the armature of the DC  servo motor, the average voltage is changed to control the speed of the motor. Therefore, it is often called a switch drive device. The schematic diagram of PWM control is shown in Figure 1.Figure 1 PWM control schematic diagramThere are usually two ways to change the duty cycle: PWM  and  PFM  (pulse frequency modulation).  PWM  is by changing the width of the on-pulse, which is commonly referred to as the fixed frequency width modulation method.  PFM means that the on-pulse width is constant and the duty cycle is changed by changing the switching frequency. Because when it encounters mechanical resonance at a particular frequency, it often results in system vibration and howling. Therefore, in the control of DC motors, the  PWM control method is mainly used. III. Control System Hardware Design The DC  motor speed control system based on 80C196KC and L298N is composed of the smallest single-chip microcomputer system, R/D converter, PWM power amplifier circuit, A/D, and D/A conversion circuit, and receiving command interface circuit. The minimum system of the single-chip microcomputer adopts the 16-bit single-chip 80C196KC external expansion interface circuit, which is mainly used to realize the functions of data acquisition and  PWM signal generation. The block diagram of the speed control system is shown in Figure 2.Figure 2 Block diagram of PWM speed control system 3.1 Introduction to Power Integrated Circuit L298N In order to improve system efficiency and reduce power consumption, the power amplifier drive circuit adopts the integrated circuit L298N based on the bipolar H-bridge pulse width modulation method. L298N is a high-performance pulse-width modulation power amplifier produced by SGS, which has the characteristics of small size and strong driving ability. It contains two H-bridge high-voltage and high-current bridge drivers, which can realize the full-bridge drive of the motor with a single chip, which can drive motors below 46V and 2A. The internal structure of L298N is shown in Figure 3.Figure 3 L298N internal structure block diagram 3.2 DC Motor Control System Hardware Circuit L298N can drive two  DC motors, because the speed control system is a single-axis structure, in order to make full use of the load capacity of the power amplifier circuit, so that the system starts at the maximum acceleration and brakes at the maximum acceleration, in the design, the input terminal and the output terminal are connected in parallel to control the  DC motor.The single-chip 80C196KC gives a PWM signal according to the calculation results of the position loop and the speed loop. The PWM signal is directly output to the IN1 (IN3) terminal, and the PWM signal is inverted and output to IN2 (IN4) through 7406. When the duty cycle of the PWM analog signal is 50%, the positive and negative voltages at both ends of the motor are applied for the same time. The motor is in a state of tremor at this position, that is, in the "power lubrication" state. When the duty cycle is greater than 50%, the signal voltage OUTA is greater than OUTB, and the motor rotates forward, otherwise reverse.Therefore, the output polarity of each link must be straightened out to form negative feedback and complete closed-loop control. Relying on changing the PWM duty cycle to control the motor speed can also change the motor rotation direction, the control method is simple and reliable. In addition, because the motor is of electric coil type, reverse electromotive force will be formed when the motor has an emergency stop and sudden commutation. To ensure the normal operation of the L298N drive chip, two pairs of continuations are added between the output terminals OUTA, OUTB, and the DC motor. The flow diode shunts the current to the positive or ground terminal of the power supply to prevent back electromotive force from damaging the L298N. 3.3 Anti-interference and Electromagnetic Compatibility Design When the motor is driven, the rapid on-off of the power main switching element leads to a large rate of change of power current and voltage, which not only affects the drive circuit but also enters the control circuit through the power supply and ground.In addition, when the motor starts and brakes, the transient voltage is generated at the sudden change of the load, its amplitude will be higher than the power supply voltage, and the leading edge is steep, the frequency band is very wide, and it enters the control circuit through the DC power supply. Therefore, anti-interference and electromagnetic compatibility design is also very important. The system has adopted measures such as current smoothing, deburring, and shielding. Current smoothing: Because the instantaneous energy of the PWM switch is relatively large, the RC filter is used at the output of the PWM power amplifier to filter. By selecting the appropriate resistance and capacitance values, high-frequency harmonics are effectively suppressed and the peak voltage of the PWM power amplifier is absorbed. Thereby reducing the interference; Deburring: The system increases the filter capacitor on the power supply side, and uses one large and one small capacitor in parallel. The large capacitor is responsible for the decoupling, filtering, and smoothing of low-frequency alternating signals, and the small capacitor eliminates mid-and high-frequency parasitics coupling in the circuit network, which effectively reduces spikes and burrs; Shielding: The motor drive cable adopts double-shielded cables, and the wiring should be separated from other cables as much as possible.Figure 4 Drive hardware circuit diagram IV. Control system software realization The control system adopts the speed-position closed-loop combination method, taking the position control method as an example to introduce the realization method of the software. The position control is based on the classic PI control algorithm, and the proportional and integral parameters are simplified design, and the segmented PI control is introduced. , That is, the calculated error is divided into sections, and different proportional and integral parameters participate in the adjustment within the error range of each section, which ensures the smoother and more stable operation of the system. The derivation and simplification process of PI formula is as follows:The specific software implementation flowchart is shown in Figure 5. That is, after receiving a given angle command, first calculate the difference between the sampled position information and the given angle, and then divide the difference into n equal parts, and each segment corresponds to a set of parameters Kp1 and ki1 participate in mediation control, calculate the output of PI control and then convert it into the corresponding PWM numerical output.Figure 5 The specific software implementation flowchart V. ConclusionThis article sums up the design scheme of the DC motor PWM control system based on 80C196KC and L298N. The single-chip microcomputer generates a PWM signal to the power integrated circuit L298N. The classic PI segment control is used to control the motor. It has the characteristics of a simple circuit and convenient control. The operating test results show that the system works stably and reliably, meets the requirements of the speed regulation function, and has been successfully applied to many airborne products.FAQWhat method is the integrated circuit L298N based on?Bipolar H-bridge pulse width modulationWhat type of computer generates PWM signal to the power integrated circuit L298N?Single-chip microcomputerWhat is l298n?This L298N Motor Driver Module is a high power motor driver module for driving DC and Stepper Motors. This module consists of an L298 motor driver IC and a 78M05 5V regulator. L298N Module can control up to 4 DC motors, or 2 DC motors with directional and speed control.What is the use of l298n?The L298N is a dual H-Bridge motor driver which allows speed and direction control of two DC motors at the same time. The module can drive DC motors that have voltages between 5 and 35V, with a peak current up to 2A.How does l298n control DC motor speed?1.If you send a HIGH signal to the enable 1 pin, motor A is ready to be controlled and at the maximum speed;2.If you send a LOW signal to the enable 1 pin, motor A turns off;3.If you send a PWM signal, you can control the speed of the motor. The motor speed is proportional to the duty cycle.What is l298n motor driver module?This L298N Motor Driver Module is a high power motor driver module for driving DC and Stepper Motors. This module consists of an L298 motor driver IC and a 78M05 5V regulator. L298N Module can control up to 4 DC motors, or 2 DC motors with directional and speed control.How does l298n motor driver work?The L298N is a dual H-Bridge motor driver which allows speed and direction control of two DC motors at the same time. The module can drive DC motors that have voltages between 5 and 35V, with a peak current up to 2A.How do i use a l298 motor driver with Arduino?Start by connecting power supply to the motors. In our experiment we are using DC Gearbox Motors(also known as 'TT' motors) that are usually found in two-wheel-drive robots. They are rated for 3 to 12V. So, we will connect external 12V power supply to the VCC terminal.What is the function of H bridge?An H-bridge is an electronic circuit that switches the polarity of a voltage applied to a load. These circuits are often used in robotics and other applications to allow DC motors to run forwards or backwards.What is the difference between l293d and l298n?L293 is quadruple half-H driver while L298 is dual full-H driver, i.e, in L293 all four input- output lines are independent while in L298, a half H driver cannot be used independently, only full H driver has to be used. ... Hence, heat sink is provided in L298. 

CatalogDescriptionCAD ModelsPin DiagramMarking DiagramFeaturesDatasheetSpecificationsManufacturerUsing WarningFAQDescriptionThe NC7SV125 is a single non−inverting 3−state buffer in tiny footprint packages. The device is designed to operate for VCC = 0.9 V to 3.6 V. CAD Models Figure: Symbol  Figure: PCB Footprints  Figure: 3D Model Pin Diagram Figure: Pin Diagram Marking Diagram Figure: Marking Diagram FeaturesDesigned for 0.9 V to 3.6 V VCC Operation1.0 ns tPD at 3.3 V (Typ)Inputs/Outputs Over−Voltage Tolerant up to 3.6 VIOFF Supports Partial Power Down ProtectionSource/Sink 24 mA at 3.3 VAvailable in SC−88A and MicroPak™ PackagesThese Devices are Pb−Free, Halogen Free/BFR Free and are RoHSCompliant DatasheetYou can download the datasheet the link given below.NC7SV125P5X-Datasheet SpecificationsProduct AttributeAttribute ValueManufacturer:onsemiProduct Category:Buffers & Line DriversNumber of Input Lines:1 InputNumber of Output Lines:1 OutputPolarity:Non-InvertingHigh Level Output Current:- 24 mALow Level Output Current:24 mAQuiescent Current:900 nASupply Voltage - Max:3.6 VSupply Voltage - Min:0.9 VOperating Supply Current:50 mAMinimum Operating Temperature:- 40 ℃Maximum Operating Temperature:+ 85 ℃Mounting Style:SMD/SMTPackage / Case:SC-70-5Packaging:ReelPackaging:Cut TapePackaging:MouseReelBrand:onsemi / FairchildFunction:Buffer/Line DriverHeight:1 mmInput Signal Type:Single-EndedLength:2 mmLogic Family:TinyLogic ULPLogic Type:CMOSNumber of Channels:1 ChannelOperating Supply Voltage:0.9 V to 3.6 VOutput Type:3-StateProduct Type:Buffers & Line DriversPropagation Delay Time:4.3 ns at 1.8 V, 2.8 ns at 2.5 V, 2.6 ns at 3.3 VSeries:NC7SV125Factory Pack Quantity:3000Subcategory:Logic ICsSupply Current - Max:0.9 uATechnology:CMOSTradename:TinyLogicWidth:1.25 mmPart # Aliases:NC7SV125P5X_NLUnit Weight:0.000705 oz ManufacturerON Semiconductor is an American semiconductor supplier company, formerly in the Fortune 500, but dropping into the Fortune 1000 (ranked 512) in 2020.Products include power and signal management, logic, discrete, and custom devices for automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power applications. ON Semiconductor runs a network of manufacturing facilities, sales offices and design centers in North America, Europe, and the Asia Pacific regions. Headquartered in Phoenix, Arizona, ON Semiconductor has revenues of $3.907 billion (2016),which puts it among the worldwide top 20 semiconductor sales leaders. Using WarningNote: Please check their parameters and pin configuration before replacing them in your circuit. FAQWhat are buffers and line drivers?Buffers and line drivers are integrated circuit devices that isolate the input circuit from the output circuit. This reduces the load seen by the input circuit and enables signals to be sent on PCB or cables over longer distances with higher fan-out. What is the difference between buffer and driver?A buffer tends to be an interposed element which keeps the source from being affected by the load attributes, but delivers the same or nearly the same voltage and current it sees at its own input. A driver usually boosts the current source/sink level, or the voltage at which it delivers its output to its load. What are the 3 main buffers?Buffer systemCarbonic acid bicarbonate buffer systemPhosphate buffer system

I DescriptionDo you know what the Digital Tube Display needs? The display of the digital tube requires a digital tube and a control circuit of multiple digital tubes. Take the single-chip microcomputer control circuit of an 8-bit digital tube as an example. The single-chip microcomputer needs to provide an 8-bit segment code and an 8-bit code. Thus, we usually choose two of the four parallel  I/O  ports in the 51 single-chip microcomputers to provide segment codes and bit codes respectively.Although this circuit hardware connection and software programming are relatively simple, there are also problems. That is: Too many  I/O ports are occupied, which affects the overall use of the microcontroller, and is not conducive to the access of other devices. How to solve this problem? We can use a type of shift register for auxiliary control. Here, this blog uses the 74HC595 chip.Figure 1. 74HC595CatalogI DescriptionII Introduction to 74HC595III 74HC595 Display Control of Multi-digit Digital Tube3.1 Hardware Connection3.2 Software Programming3.3 Simulation DebuggingIV ConclusionFAQOrdering & QuantityII Introduction to 74HC59574HC595 is a CMOS shift register with open-drain output. The output port is a controllable three-state output. It can also control the next-level cascaded chip serially. Its structure is usually a 16-pin DIP package or SO package. The 74HC595 pinout is shown in Figure 2, and the corresponding pin functions are shown in Table 1.　　Figure 2. 74HC595 PinoutThe main features of 74HC595  are:8-bit serial input/8-bit parallel or serial output;Three-state output register (three-state output: a gate circuit  with three output states of high level, low level, and high impedance); High-speed low-power consumption, high-speed shift clock frequency Fmax> 25MHz.Table 1. 74HC595 Pin FunctionPin NumberPin NamePin Function15,1~7Q0~Q7Parallel tri-state output pin8GNDPower ground9Q7’Serial data output pin10/MRClear end of shift register (active low)11SH_CPSerial data input clock line12ST_CPOutput memory latch clock line13/OEOutput enable (active low)14DSSerial data input line16VCCPower endIII 74HC595 Display Control of Multi-digit Digital TubeHere, this blog takes the single-chip microcomputer control multi-digit digital tube as an example. To use the chip correctly, you must first correctly understand the timing diagram or truth table of the chip. The truth table of 74HC595 is shown in Table 2.Input PinOutput PinDSSH CP/MRST CP/OE××××HQ0~Q7 output high impedance××××LQ0~Q7 output effective value××L××Clear shift registerLRising EdgeH ××Shift register store low levelHRising EdgeH××Shift register store high level×Falling EdgeH××Shift register state retention×××Rising Edge×State value in output shift register×××Falling Edge×Output memory state retentionIt can be found that the serial data is connected to the DS pin, but it is the only input to the shift register when SH_CP is a rising edge and enters the storage register when ST_CP is a rising edge. If the two clocks are connected together, the shift register is always one pulse earlier than the storage register.The shift register has a serial shift input (Ds), a serial output (Q7'), and an asynchronous low-level reset. The storage register has a parallel 8-bit, three-state bus output. When OE is enabled (low level), the data of the storage register is output to the bus.3.1 Hardware ConnectionSince the 8-bit digital tube needs to provide a total of 16 bits of segment code and bit code at the same time, it cannot be realized by using one 74HC595.  To solve this problem, we use two 595 chips to cascade serially to provide an 8-bit segment code (provided by U2) and an 8-bit code (provided by U3). The simulation hardware circuit is shown in Figure 3. The input signal of 595 is connected to the three I/O ports of P2.0~P2.2 respectively. Among them, P2.0 provides serial input signals, P2.1 and P2.2 provide output and input clock signals respectively.Figure 3. Simulation Hardware Circuit Diagram3.2 Software ProgrammingHere, we use 2 pieces of 74HC595 chips for serial cascading. Therefore, you must pay attention to the sequence of serial data output when programming. The usual practice is as follows:First, write the data (ie bit code) of the 74HC595 chip at the next level;Then, write the data (ie segment code) of the first-level 74HC595 chip;Finally, release the parallel output pins together at once.The sample program is as follows (partial):　　void OneLed_Out (uchar i,uchar Location)　　{　　uchar j;　　OutByte=Location;　　for(j=1;j<=8;j++)　　{　　DS=Bit_Out;　　SH_CP=0;SH_CP=1;SH_CP=0;　　OutByte=OutByte<<1;　　}　　OutByte=~Segment[i];　　for(j=1;j<=8;j++)　　{　　DS=Bit_Out;　　SH_CP=0;SH_CP=1;SH_CP=0;　　OutByte=OutByte<<1;　　}　　ST_CP=0;ST_CP=1;ST_CP=0;　　}3.3 Simulation DebuggingWe can draw the hardware circuit diagram on the Proteus 7 platform, and then write the software program on the Keil4.0 platform and compile and debug it. Then, load the generated HEX file into the simulation chip and run the simulation. If all goes well, the results will be displayed correctly. According to the display requirements, it can realize 8-bit digital tube shift display or 8-bit digital tube simultaneous display.The simulation results are shown in Figures 4 and 5.　　Figure 4. Shift Display of 8-bit Digital Tube　　Figure 5. Simultaneous Display of 8-bit Digital TubesIV ConclusionThe test results of this blog show that there are many advantages to the display control of multi-digit digital tubes through the cascade of 74HC595 chips. These benefits are mainly reflected in the following aspects:It can greatly reduce the display control of the single-chip digital tube;It can greatly reduce the occupancy of the MCU  I/O port line;The circuit is simple and easy to program.The method introduced in this blog, whether it is to conduct simulation teaching on a computer, or to build actual hardware circuits. In general, the current 74HC595 chip is cost-effective, and the cost of building a circuit is low, making it very suitable for general use.FAQWhat is 74HC595?74HC595 is a shift register which works on Serial IN Parallel OUT protocol. It receives data serially from the microcontroller and then sends out this data through parallel pins. We can increase our output pins by 8 using the single chip.What is a 74hc595n?8-bit Shift Register 74HC595NA shift register is a chip you can use to control many outputs (8 here) at the same time while only using a few pins (3 here) of your Arduino.How does a shift register work?Shift registers hold the data in their memory which is moved or “shifted” to their required positions on each clock pulse. Each clock pulse shifts the contents of the register one bit position to either the left or the right.How 74HC595 Shift Regiester works?The 595 has two registers (which can be thought of as “memory containers”), each with just 8 bits of data. The first one is called the Shift Register. The Shift Register lies deep within the IC circuits, quietly accepting input.How does an 8 bit shift register work?The SN74HC595N is a simple 8-bit shift register IC. Simply put, this shift register is a device that allows additional inputs or outputs to be added to a microcontroller by converting data between parallel and serial formats. Your chosen microprocessor is able to communicate with the The SN74HC595N using serial information then gathers or outputs information in a parallel (multi-pin) format. Essentially it takes 8 bits from the serial input and then outputs them to 8 pins.What is a digital tube?Light emitting diode connects the anode together and then connected to the power of positive is called common anode digital tube, light emitting diode connected to the cathode and then connected to the power of the cathode is called common cathode digital tube.What is the difference between shift register and counter?In a shift register, the input of element N is the output of element N-1, and all elements use the same clock. In a counter, the input of element N is the inverse of its output, and the clock of element N+1 is the output of element N.

Product OverviewThe Virtex-7 FPGA VC707 Evaluation Kit is a full-featured, highly-flexible, high-speed serial base platform using the Virtex-7 XC7VX485T-2FFG1761C and includes basic components of hardware, design tools, IP, and pre-verified reference designs for system designs that demand high-performance, serial connectivity and advanced memory interfacing. The included pre-verified reference designs and industry-standard FPGA Mezzanine Connectors (FMC) allow scaling and customization with daughter cards. This blog will introduce VC707 systematically from its features, schematics to its specifications, applications, also including VC707 datasheet and so much more. CatalogProduct OverviewVC707 FeaturesVC707 HardwareWhat’s Inside the VC707 Evaluation KitVC707 Board Block DiagramVC707 SpecificationVC707 Datasheets: Schematics, User Guide, Ethernet DesignVC707 ManufacturerUsing WarningsVC707 FAQ VC707 Features40Gb/s Connectivity platform for high-bandwidth and high-performance applications using Virtex-7 VX485T FPGAsHardware, design tools, IP, and pre-verified reference designsAdvanced memory interface with 1GB DDR3 SODIM Memory up to 800MHz / 1600MbpsEnabling serial connectivity with PCIe Gen2x8, SFP+ and SMA Pairs, UART, IICSupports embedded processing with MicroBlaze, soft 32bit RISCDevelop networking applications with 10-100-1000 Mbps Ethernet (RGMII)Develop networking and other serial applications with 4 SFP/SFP+ portsExpand I/O with the FPGA Mezzanine Card (FMC) interface VC707 HardwareFPGA: Virtex XC7VX485T-2FFG1761CROHS compliant VC707 kit including the XC7VX485T-2FFG1761 FPGA ConfigurationOnboard JTAG configuration circuitry to enable configuration over USBJTAG header provided for use with Xilinx download cables such as the Platform Cable USB II128MB (1024Mb) Linear BPI Flash for PCIe® Configuration16MB (128Mb) Quad SPI Flash Memory1GB DDR3 SODIMM 800MHz / 1600Mbps128MB (1024Mb) Linear BPI Flash for PCIe Configuration8Kb IIC EEPROMSD Card Slot Communication & NetworkingGigabit Ethernet GMII, RGMII and SGMIISFP+ transceiver connectorGTX port (TX, RX) with four SMA connectorsUART To USB BridgePCI Express x8 gen2 Edge Connector (lay out for Gen3) DisplayHDMI Video OUT2 x16 LCD display8X LEDs Expansion ConnectorsFMC1 – HPC (8 XCVR, 160 single ended or 80 differential (34 LA pairs, 24 HA pairs, 22 HB pairs) user-defined pins)FMC2 – HPC (8 XCVR, 116 single ended or 58 differential (34 LA pairs, 24 HA pairs) user-defined pins)Vadj supports 1.8VIIC ClockingFixed Oscillator with differential 200MHz output, Used as the “system” clock for the FPGAProgrammable Oscillator with 156.250 MHz as the default output, Default frequency targeted for Ethernet applications but oscillator is programmable for many end usesDifferential SMA clock inputDifferential SMA GTX reference clock inputJitter attenuated clock, Used to support CPRI/OBSAI applications that perform clock recovery from a user-supplied SFP/SFP+ module Control & I/O5X Push Buttons8X DIP SwitchesRotary Encoder Switch (3 I/O)AMS FAN Header (2 I/O) Power12V wall adapter or ATXVoltage and Current measurement capability Debug & Analog Input8 GPIO Header, 9 pin removable LCDAnalog Mixed Signal (AMS) Port What’s Inside the VC707 Evaluation KitVC707 evaluation board with the Vintex-7 XC7VX485T2FFG1761CES FPGAFull-seat ISE Design Suite Logic Edition, device-lockedfor the Virtex-7 XC7VX485T-2FFG1761CES FPGAReference and example designs and demonstrations*Board design files*Documentation*, including a step-by-stepGetting Started GuideUSB cables, Ethernet cable, and universal power supply VC707 Board Block DiagramThe following figure shows the board block diagram of VC707. VC707 Board Block Diagram VC707 Board Block DiagramThe following figure shows the board block diagram of board component locations. VC707 Board Component Locations VC707 SpecificationProduct AttributeAttribute ValueManufacturer:XilinxProduct Category:Programmable Logic IC Development ToolsProduct:Evaluation KitsType:FPGATool Is For Evaluation Of:XC7VX485TBrand:XilinxFor Use With:Virtex-7Operating Supply Voltage:100 VAC to 240 VACProduct Type:Programmable Logic IC Development ToolsFactory Pack Quantity:1Subcategory:Development ToolsTradename:VirtexUnit Weight:6.340 lbs VC707 Datasheets: Schematics, User Guide, Ethernet DesignYou can download this datasheet for VC707 schematics, user guide, evaluation board from the link given below:VC707 Schematics VC707 User GuideVC707 Evaluation BoardVC707 Ethernet Design VC707 ManufacturerXilinx, Inc. is an American technology company that develops highly flexible and adaptive processing platforms. The company invented the field-programmable gate array (FPGA), programmable system-on-chips (SoCs), and the adaptive compute acceleration platform (ACAP). It is the semiconductor company that created the first fabless manufacturing model. Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. VC707 FAQWhat is evaluation kit?Evaluation Kit (EV Kit, Development Kit): A printed circuit board with an integrated circuit and support components to produce a working circuit for evaluation and development. Most Evaluation Kits are fully assembled and tested. What is the difference between evaluation and development?The evaluation board is used to determine if a semiconductor component is a good or the best fit for an application. The development board is the production version of the evaluation board with all pertinent components and connectors included. How to start the Virtex-7 FPGA vc707 evaluation kit?Updated Introduction, VC707 Evaluation Kit Contents, Project Files , Extract the AMS Design Files , Set Up the Hardware , and Examine Analog Mixed Signal Features . Removed IBERT Demonstratio n, MultiBoot Design, MIG Design, Integrated Endpoint Block for PCI Express®, and LogiCORE™ IP Ethernet SGMII Designs sections. What is the use of VC707?The VC707 evaluation board for the Virtex®-7 FPGA provides a hardware environment for. developing and evaluating designs targeting the Virtex-7 XC7VX485T-2FFG1761C FPGA.

DescriptionULN2003A is a Darlington transistor array with high voltage and high current. It consists of seven NPN Darlington pairs with a high voltage output and a common cathode clamp diode for switching inductive loads.CatalogDescriptionULN2003A PinoutULN2003A Documents and MediaULN2003A ECAD ModelULN2003A FeaturesULN2003A AdvantagesWhere to use ULN2003How to use ULN2003ULN2003A ApplicationULN2003A Package InformationULN2003A Representative Schematic DiagramProduct ManufacturerFAQOrdering & QuantityULN2003A PinoutULN2003A Documents and MediaResource TypeLinkDatasheetsULN2003A, ULQ2003AHTML DatasheetULN2003A, ULQ2003AULN2003A ECAD Model ULN2003ADR2G Symbols  ULN2003ADR2G Footprints ULN2003A FeaturesThe ULN2003 is known for its high-current, high-voltage capacity. The drivers can be paralleled for even higher current output. Even further, stacking one chip on top of another, both electrically and physically, has been done. Generally it can also be used for interfacing with a stepper motor, where the motor requires high ratings which cannot be provided by other interfacing devices.ULN2003 Main specifications:500 mA rated collector current (single output)50 V output (there is a version that supports 100 V output)Includes output flyback diodesInputs compatible with TTL and 5-V CMOS logicULN2003A AdvantagesThe ULN2003A is an array of seven NPN Darlington transistors capable of 500 mA, 50 V output. It features common-cathode flyback diodes for switching inductive loads. It can come in PDIP, SOIC, SOP or TSSOP packaging. In the same family are ULN2002A, ULN2004A, as well as ULQ2003A and ULQ2004A, designed for different logic input levels.The ULN2003A is also similar to the ULN2001A (4 inputs) and the ULN2801A, ULN2802A, ULN2803A, ULN2804A and ULN2805A, only differing in logic input levels (TTL, CMOS, PMOS) and number of in/outputs (4/7/8).Where to use ULN2003ULN2003 IC is one of the most commonly used Motor driver IC. This IC comes in handy when we need to drive high current loads using digital logic circuits like Op-maps, Timers, Gates, Arduino, PIC, ARM etc. For example a motor that requires 9V and 300mA to run cannot be powered by an Arduino I/O hence we use this IC to source enough current and voltage for the load. This IC is commonly used to drive Relay modules, Motors, high current LEDs and even Stepper Motors. So if you have anything that anything more than 5V 80mA to work, then this IC would be the right choice for you.How to use ULN2003The ULN2003 is a 16-pin IC. It has seven Darlington Pairs inside, where each can drive loads up to 50V and 500mA. For these seven Darlington Pairs we have seven Input and Output Pins. Adding to that we can a ground and Common pin. The ground pin, as usual is grounded and the usage of Common pin is optional. It might be surprising to note that this IC does not have any Vcc (power) pin; this is because the power required for the transistors to work will be drawn from the input pin itself. The below circuit is a simple circuit that can be used to test the working of ULN2003 IC. In the circuit consider the LED to be the loads and the logic pins (blue color) as the pins connected to the Digital circuit or Microcontroller like Arduino. Notice that the Positive pin of the LED is connected to the positive load voltage and the negative pin is connected to the output pin of the IC. This is because when the input pin of the IC gets high the respective output pin will get connected to ground. So when the negative terminal of the LED is grounded it completes the circuit and thus glows. The loads connected to the output pin can be maximum of 50C and 500mA each. However you can run higher current loads buy combining two or more output pins to gather. For example if you combine three pins you can drive up to (3*500mA) ~1.5A.The COM pin is connected to ground through a switch, this connection is optional. It can be used a test switch, meaning when this pin is grounded all the output pins will be grounded.ULN2003A ApplicationTypical usage of the ULN2003A is in driver circuits for relays, lamp and LED displays, stepper motors, logic buffers and line drivers.A ULN2003 installed in a breakout board to be used as a unipolar stepper motor driver with a 28BYJ stepper motor on the left.ULN2003A Package InformationULN2003A Representative Schematic DiagramProduct ManufacturerON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.FAQWhat is the use of uln2003a?Typical usage of the ULN2003A is in driver circuits for relays, lamp and LED displays, stepper motors, logic buffers and line drivers.What is the function of uln2003 driver in interfacing of stepper motor?Known for its high current and high voltage capacity, the ULN2003 gives a higher current gain than a single transistor and enables the low voltage and low current output of a microcontroller to drive a higher current stepper motor.What is a Darlington array?Darlington devices are high-voltage, high-current switch arrays containing multiple open-collector Darlington pairs or multiple Darlington transistors with common emitters, and integral suppression diodes for inductive loads.How to use the ULN2003A Transistor Array with Arduino?