How to look at the internal structure of the FPGA chip

March 27, 2024
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FPGA (programmable door array) is a programmable chip based on programmable logic blocks.FPGA chip is one of the core components in modern electronic circuit design because it can provide greater flexibility than ASIC chips and higher performance than microprocessors.Understanding the internal structure of the FPGA chip is essential for learning and using the FPGA chip.

Clbs and interconnects

The core structure of the FPGA chip is CLBS (programmable logic block) and interconnects.CLB is a programmable logic unit that usually includes log-up table (LUT) and trigger logic circuits.Interconnects is a network that is used to connect CLB together.The interconnection usually includes a programmable circuit, such as cross -switching and programmable connection resources to connect CLB to achieve design specifications and logical circuit parts.

Cyclone III FPGA

Routing resources

Routing resource is a circuit used in FPGA chips to connect to CLB and other FPGA resources.These resources include multiple types of cross switches and programmable connection resources to interconnect Interconnects and other chip components.These cross -switching and connection resources are usually connected to a multi -layer chip -level network to achieve higher flexibility.

CLOCK Network

The clock network is an important part of the FPGA chip. It is provided for clock -related logical circuits to the clock signal that can work in a specific time at a specific time.The clock network usually includes pure circuits and electrical components such as reverse, frequency divisor, and locking loops.


Block Rams and DSPS

FPGA chips usually include a large number of BLOCK RAM (block random access memory) and DSP (digital signal processing) modules, which can be used to store and process large amounts of data.Block RAMS is usually used to store a large amount of status information or has a good reused access address. DSPS can be used to perform many high -efficiency digital signal processing algorithms, even high -definition compression algorithms, audio processing algorithms, and so on.

Configuration Memory

The FPGA chip also includes the configuration memory for storing CLB, Interconnects and other circuits in the FPGA chip.During the configuration process, the working voltage is achieved quickly with the rapid change of electrical ascending and signal. The initial value of the configuration memory is read to complete the programming of the circuit on the film.-Addled memory is an electronic memory memory circuit or a metal oxide semiconductor memory, and supports a variety of different programming methods, including serial programming, parallel programming, internal or external configuration.

Power and GROUND

Power and ground wires are required to run FPGA chips.The power supply voltage is usually between 1.2 volts and 3.3, and the power voltage of most FPGA chips is 2.5 volts.Under normal circumstances, the FPGA chip needs a large current, and the current changes very fast. Therefore, it is very important to reasonably design the power supply, grounding circuit and power supply processing circuit.Significantly improved.


Temperature and Environmental Monitoring

Temperature and environmental monitoring can help effectively prevent or restrict some thermal damage, electromagnetic phenomena, static electricity phenomena, etc. in the FPGA chip, thereby improving the stability and performance of the system.Some FPGA chips are equipped with some functions such as environmental detection and monitoring to help customers monitor the operation of the chip and get its corresponding reports.These functions include power current, power supply voltage, clock frequency, temperature, electrostatic, electromagnetic radiation strength, and so on.


It is very important to understand the internal structure of the FPGA chip.The most important elements include CLBS and Interconnects, interconnection and related programmable cross switches and connection resources, clock networks, BLOCK RAMS, DSPS, configuration memory, power and ground line, etc.The reasonable design and implementation of all these elements makes the FPGA chip a programmable logic chip with powerful, high performance, and wide applicable range.

When learning and using FPGA chips, remember to understand the internal structure of the FPGA chip is very important