GAL22V10D-4LJ

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GAL22V10D-4LJ Application Field and Working Principle

GAL22V10D-4LJ is a type of Complex Programmable Logic Device (CPLD) created by Lattice Semiconductor. This CPLD is used in a variety of embedded systems, from automotives, to industrial applications, to consumer electronics. Though small in size, GAL22V10D-4LJ has powerful operating capabilities, due to its flexibility in both programming and hardware fusing. Understanding how the GAL22V10D-4LJ works will provide insights into its capabilities and application fields.

Overview

GAL22V10D-4LJ is a CPLD device that features 16 macrocells, each consisting of a 4-input look-up table (LUT). It is configured with 32 I/O structures and a 132-bit instruction register, along with programmable clock delay and power-on-reset management circuitry. This small, low-voltage CPLD has an operating voltage of 1.8 to 3.3V, and its low static power consumption makes it a great choice for many different types of embedded systems.

Programming and Fusing

GAL22V10D-4LJ can be programmed through either a GAL22V10D-4LJISP, or Lattice\'s in-system programming (ISP) solution, designed for those who do not have access to a GAL22V10D-4LJISP. Basic programming consists of updating firmware, setting through-hole fuse segments, or loading the target device with an image. Fuses and devices can be set or programmed directly through the ISP, and an in-circuit debugger facilitates debugging.

Fusing is the process of setting the logic state of the device. To do this, the device is “fused”. This is done when the program is loaded and the final logic state of the device is set to the desired performance. The fuses are set either through the ISP, or through the on-chip fuse segments. For the GAL22V10D-4LJ, fuse segments are used to set the device, as each device’s fusing is unique. This allows for flexibility in hardware design.

Applications of GAL22V10D-4LJ

Given its small physical size, low power consumption, and flexibility in configuration, GAL22V10D-4LJ is used in a variety of embedded systems. It has found great application in the automotive industry, where it is used for managing control of lights and wiper systems. It is also utilized in consumer electronics, such as television remote systems and MP3 players. Moreover, GAL22V10D-4LJ has been used in industrial automation, including in-circuit and on-board test systems.

Conclusion

The GAL22V10D-4LJ is a powerful and flexible CPLD device. Its ability to be programmed directly, as well as set through fuse segments, make it a great choice for a variety of embedded systems. Its low voltage and power consumption make it especially attractive for many automotive, consumer electronics, and industrial automation applications. Understanding how it works makes it an even more attractive option.

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