SOPC, FPGA, ASIC, CPLD, SOC, what do they mean, and what is the connection between them?

The upstairs would be more detailed.

Answer]: Structural differences. CPLDs are mostly based on productrterm technology and EPROM (or flash) processes: FPGAs are generally based on look-up table (LUT) technology and SRAM processes.

The wiring structure of CPLD determines that its timing delay is uniform and can be used; The routing structure of FPGAs leads to unequal and unequal transmission delays, which can cause trouble for design work and limit the speed at which devices can be carried out.

The programming of CPLD adopts BPROM or Flash technology, no hidden answer requires an external memory chip, and it is simple to use: the programming information of FPGA needs to be stored on external memory, which is complex to use, and the programming data is stored in EPROM, read out and sent to the SRAM of FPGA, which is not conducive to confidentiality. When the SRAM-based FPGA is powered down, the programming information is lost, so the programming data is reloaded every time you start working.

In general, the power consumption of CPLD is larger than that of FPGA, and the higher the level of integration, the more obvious it is. Although the integration degree of CPLD and FPGA can reach dozens of halls and thousands of doors, in comparison, CPLD is more suitable for completing various algorithms and combinatorial logic. FPGAs, on the other hand, are more suitable for logic circuits that complete a large number of sequences. In other words, FPGAs are better suited to flip-flop-rich structures, while CPLDs are better suited to flip-flop-rich structures with product-rich terms.

FPGA, CPLD, ASIC, PLD are all commonly used terms in digital circuit design, and the relationship between them is as follows:

1.PLD (Programmable Logic Device) is a general term that includes FPGA and is a programmable digital circuit that can be programmed according to the user's needs to roll over to achieve different functions.

2.FPGA (Field Programmable Gate Array) and Complex Programmable Logic Device (CPLD) are both types of PLD. They are all programmable digital circuits that can be programmed according to the user's needs to achieve different functions.

The main difference between FPGA and CPLD is that they differ in structure and size. FPGAs are typically larger and more complex than CPLDs, allowing for more complex functions.

3.An ASIC (application-specific integrated circuit) is a customized digital circuit that is designed and manufactured according to specific application requirements. ASICs are typically faster, smaller, and more energy-efficient than PLDs, but are more expensive to design and manufacture, making them suitable for high-volume production.

ASIC is not a generic term for FPGA and CPLD, but rather a different way of designing digital circuits than PLD. PLDs include FPGAs and CPLDs, which are programmable digital circuits that can be programmed according to the user's needs to achieve different functions.

FPGA, CPLD, ASIC, and PLD are all ways to implement digital logic circuits, and they have different implementations and scopes.

1. FPGA is a field programmable gate array, which is a kind of programmable digital logic device, which can be programmed by the user for arbitrary logic functions to realize flexible modification and adaptive adjustment of the circuit structure. FPGAs are used in digital signal processing, embedded systems, network communications, and other fields.

2. CPLD is a complex programmable logic device, which is one of the programmable digital logic devices, which is smaller in scale and complexity than FPGA, and is suitable for the design of logic gate arrays and flip-flops.

3. ASIC is an application-specific integrated circuit, which is a kind of personalized integrated circuit that is designed for a specific application. ASICs can implement any function according to user needs, and their development costs are high, making them suitable for high-volume application scenarios.

4. PLD programmable logic devices refer to digital logic devices that can be programmed by users according to specific application scenarios, including FPGA, CPLD, etc.

FPGAs (Field Programmable Gate Arrays) and CPLDs (Programmable Logic Devices) are both types of PLDs (Programmable Logic Devices). PLD refers to a class of circuit devices in which logic functions can be programmed. The difference between FPGA and CPLD is that they have different programmable resources and architectures, FPGAs have larger programmable resources and more flexible architectures, while CPLDs generally consume less power than FPGAs but have comparatively fewer programmable resources.

ASIC (

In general, these four-posture devices are all commonly used programmable circuit devices in digital circuit design, but their application scenarios and design complexity are different, and they need to be selected according to specific needs.

FPGAs, CPLDs, Sellsen ASICs, and PLDs are all programmable logic devices commonly used in digital circuit design. The relationship between them is as follows:

PLD is a kind of programmable logic device, it includes PAL (programmable array logic device) and GAL (general array logic device) and other types, compared with FPGA and CPLD, PLD has a smaller number of programmable logic units, suitable for the logic design is more simple than the occasion.

ASICs are application-specific integrated circuits whose circuit structure is fixed and cannot be reprogrammed, but is highly customizable and can be designed and manufactured according to specific application needs, so it has advantages in terms of high performance, high reliability, low power consumption, etc., but it is also more expensive to design and manufacture.

FPGAs (Field Programmable Hail Arrays), CPLDs (Complex Programmable Logic Devices), ASICs (Application Specific Integrated Circuits), and PLDs (Programmable Logic Devices) are all common concepts in digital circuit design delay eliminators.

FPGA and CPLD are programmable

Let's take it literally:

sopcsystem-on-a-programmable-chip.

Programmable logic technology is used to put the entire system on a single silicon wafer, called a SoPC. A programmable system-on-chip is a special kind of embedded system: first, it is a system-on-chip (SoC), that is, a single chip completes the main logic functions of the entire system; Secondly, it is a programmable system, with a flexible design method, which can be cut, expanded, upgraded, and has the function of software and hardware programmable in the system.

。。To put it bluntly, SOPC is a technology...

fpga（field－programmable gate

array), that is, field programmable gate array, which is a product of further development on the basis of programmable devices such as PAL, gal, and CPLD.

。。FPGAs are a class of hardware...

The connection between FPGA and SOPC is that the system on chip can be built on the FPGA chip using the VHDL language, and the technology of using the programming language to build an embedded system on a logic device is called SOPC technology.

CPLDs and FPGAs include a relatively large number of logical units. CPLD logic gates.

The density is between a few thousand and tens of thousands of logic cells, while FPGAs are usually in the tens of thousands to millions.

The main difference between CPLD and FPGA is their system structure. CPLD is a somewhat restrictive structure. This structure consists of one or more logical columns that can sum up the results and a relatively small number of locked registers.

The result is a lack of flexibility, but it has the advantage of predictable latency and a high ratio of logical cells to connected elements. FPGAs, on the other hand, have a lot of connection units, which makes them more flexible, but the structure is much more complex.

Another difference between CPLDs and FPGAs is that most FPGAs contain high-level built-in modules (such as adders.

and multipliers) and built-in memory.

An important difference related to this is that many new FPGAs support full or partial intra-system reconfiguration. Allow their design to change as the system is upgraded or dynamically reconfigured. Some FPGAs can make one part of the device go back and the other part continues to function normally.

The difference is that the CPLD is mainly composed of a programmable interconnect matrix unit centered around a programmable logic macro cell (LMC). FPGAs typically consist of three classes of programmable resources:

Programmable logic function blocks, programmable IO blocks, and programmable interconnects.

With the increasing density of complex programmable logic devices (CPLDs), digital device designers are flexible and easy to design large, and products can quickly enter the marketMany designers have found CPLD easy to use. However, in the past, due to the limitations of CPLD density, they had to turn to FPGAs and ASICs.

Applications of CPLD

The advent of reconfigurable PLDs (programmable logic devices) based on SRAM (Static Random Access Memory) has created the conditions for system designers to dynamically change the logic functions of PLDs in running circuits. The PLD uses SRAM units to hold configuration data. These configuration data determine the interconnection and logic function within the PLD, and changing this data also changes the logic function of the device.

Since SRAM data is volatile, it must be stored in nonvolatile memory such as EPROM, EEPROM, or Flash ROM other than the PLD device, so that the system can ** it into the SRAM unit of the PLD at the appropriate time, so as to achieve in-circuit reconfigurability in the circuit.