Most of you here very familiar with the Arduino-based microcontroller and you do know about the characteristics and features of some sort of Arduino.
We’re not discussing about Arduino today, but will move on to another interesting topic, the Complex Programmable Logic Device. Do you know that a complex programmable logic device (CPLD) is a programmable logic device with complexity between that of PALs and FPGAs? The building block of a CPLD is the macro cell, where it can contain logic implementing “disjunctive normal form” expressions and more specialized logic operations.
If you want to cut down the development cost, then you should apply the CPLD in the design, where a CPLD is cheaper, faster and can be programmed with your ideal pin-out configuration for simpler PCBs. Or, if you’re looking for maximum speed and instant response, CPLD is also your first choice, due to its fast and amazing speed. Most of the CPLDs can be started at a 100 MHz, while microcontroller responds to interrupts at a few MHz.
Although FPGA are well known than CPLD, but their analogy isn’t that perfect than CPLD. The main distinction between FPGAs and CPLD devices are that FPGAs are mainly based on Look-up tables (LUTs), while the CPLDs form the logic functions with sea-of-gates.