Abstract
The article presents a modification to the method which applies two sources of data. The modification is depicted on the example of a compositional microprogram control unit (CMCU) model with base structure implemented in the complex programmable logic devices (CPLD). First, the conditions needed to apply the method are presented, followed by the results of its implementation in real hardware.
Highlights
Control units are very important parts of digital systems [1]-[6]
To reduce the amount of hardware in the logic circuit of a control unit, the peculiarities of the complex programmable logic devices (CPLD) and the features of a control algorithm to be implemented should be taken into account
It is assumed by the authors that the control memory (CM) of the compositional microprogram control unit (CMCU) can be implemented as external PROM/ROM memory
Summary
Complex programmable logic devices (CPLD) are widely used for implementing logic circuits of control units [7] [8]. (2014) The Application and Adaptation of the Two Sources of Code and Natural Encoding Method for Designing a Model of Microprogram Control Unit with Base Structure. To reduce the amount of hardware in the logic circuit of a control unit, the peculiarities of the CPLD and the features of a control algorithm to be implemented should be taken into account. It is assumed by the authors that the control memory (CM) of the CMCU can be implemented as external PROM/ROM memory. This article presents a mathematical model and a design algorithm with two sources of code and natural encoding which has been modified and adopted to CMCU model with base structure [14] [15]
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