ABB DSPC 452 Controller unit

Description

A Control Unit, or CU, is one of the CPU components, sometimes attached to the

CPU. Its basic function is to access instructions from inside, analyze instructions and execute instructions.
A control unit is a control instrument or control component that realizes one or more

control laws. For example, multiple transmission control unit and proxy setting control unit.
No matter what kind of control unit, the principle is to control each part of the CPU through

the control signal issued by the control unit. Control units can be broadly divided into the following two categories.
Microprogram type, which reads and sends control signals by microprogram. The microprogram

ABB DSPC 452

is executed through a simple digital path called a microsequencer (microcomputer). [1]
Hardware type control unit. The control signal is sent directly by the digital path. Due to the scale of

integrated circuits and the progress of design technology, this kind of control unit has become possible.
According to the user’s pre-programmed program, it takes out each instruction from the memory in turn,

puts it in the instruction register IR, determines what operation should be carried out through instruction

decoding (analysis), and then sends a microoperation control signal to the corresponding component by

operating the controller OC, according to the determined timing. The operation controller OC mainly includes

the control logic of beat pulse generator, control matrix, clock pulse generator, reset circuit and power off circuit.

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