altera intel fpga

will enter the wrong state. This foot cannot be used as a normal I/O pin. The nstatus foot must pull up a 10K ohm resistor.Conf_done.This is a dedicated configuration state foot. Two-way foot, when it is output foot, is open drain. When the pin is output as a status, it is set to low level before and during the configuration. Once the configuration data is received and there are no errors, the initialization cycle starts and the Conf_done is released. When entering a pin as a state, when all da

Many of the friends who have done microcontroller know that after the MCU is burned to write the program firmware, then the program firmware is stored inside the MCU. The program can continue to operate even if the MCU is powered off and then re-energized. This is because the firmware of the MCU is written to write the program firmware to the MCU on-chip program memory ROM, and most modern MCU this ROM is flash memory. Flash memory can be power-down to keep data, so can realize the power-down pr

DDR2 Circuit DesignHigh-speed large-capacity cache is an essential hardware in high-speed big data applications. At present, the use of a wide range of high-speed large-capacity memory in FPGA system has a classical low-speed single data rate of SDRAM memory, and high-speed dual-rate DDR, DDR2, DDR3 type SDRAM memory, The DDR series of memory all require the FPGA chip has the corresponding hardware circuit

Recently, the great god of end China, a faint bean, published the blog fpga r D path (25)-pin, I just got a new book titled deep understanding of Altera FPGA application design. Here we will organize the knowledge of the two. I/O feature notes for the cyclone IV device will be added later. In the previous article, the pin introduction in

Source: http://www.union-rnd.com/xilinx-vs-altera-slices-vs-les/ObjectiveOften a friend asks me, "Am I using a FPGA or X-Home FPGA for this program?" Do they have enough capacity? How do they compare their capacity? "Of course, most of the time, when I design for the customer, I will use the highest capacity products directly, because our products are not sensiti

Link: http://www.altera.com.cn/literature/wp/wp-01166-bdti-altera-floating-point-dsp.pdf In the future, it will be more meaningful to conduct a comparison test of Xilinx DSP architecture FPGA based on the testing method in this article. But remember: the human brain is the best optimizer! Introduction: OverviewFPGAs are increasingly used as Parallel Processing engines for demanding digitalSignal processing

Source of the problem:The serial data interface is debugged, and the data line is expected to be nanosecond-delay in CPLD (EPM570).Resolution process:--Using Insert Lcell to delay, Lcell delay is relatively fixed but will be affected by temperature, device and other factors;The Insert method is as follows:Wire ad1_ch0_wire; = adc_b0; Lcell U0_lcell/** * ( . inch (Ad1_ch0_wire), . out (Ad1_ch0) );Note that need /* Synthesis keep */To keep Lcell is not optimized in

In Chip Planner, when you watch your feet, you'll see the pin and pad appear at the same time,such as pin120/pad174 Bank 4So what's the difference?Pin refers to the chip is packaged in the pin, that is, the user sees the pin;Pad is the pin of the wafer, is encapsulated in the inside of the chip, the user can not see.There is also a wire connection between the pad and the pin.Pad also refers to the input and output buffer/register unit.Further in the Resource property Editor see the PAD as follow

The structure of an IO in Chip planner is shownThe left side is the output section to the right of the input section, but will notice two structure: 1, register, 2,delay moduleHere's my guess: These two structures are designed for timing optimization and are mentioned in Altera's timing optimization documentation for the fast input and output registers in the Io cell.If you have the correct timing constraints, the Quartus software can automatically determine whether the register is placed in the

The first step must be the pin planner, which is the view of the four generations of black gold ep4ce15f17c8. The first is to find that their pin has different color areas, which correspond to different banks respectively. Some designs require that the pin be in the same bank (first, this conjecture is followed by verification ), what does different circles and triangles mean? View --> pin legend In the figure, the pin of several brown backgrounds is used. If you place the cursor on the pin, t