PCD232A ABB 板卡扩展控制执行使用易操作实行

PCD232A ABB 板卡扩展控制执行使用易操作实行

种类

PCD232A101 3BHE022293R0101无论哪-个种类的控制单元，原理均为通过控制单元发出的控制信号对CPU各个部分加以控制。控制单元大体可以分为以下两类。

微程序式，由微程序读取和发出控制信号。通过被称为微型定序器的简单数字通路(微型电脑)对微程序加以执行。

硬件型控制单元。由数字通路直接发出控制信号。由于集成电路的规模化及设计技术的进步，此种控制单元已成为可能。

功能

PCD232A101 3BHE022293R0101它根据用户预先编好的程序，依次从存储器中取出各条指令，放在指令寄存器IR中,通过指令译码(分析)确定应该进行什么操作，然后通过操作控制器OC,按确定的时序，向相应的部件发出微操作控制信号。操作控制器OC中主要包括节拍脉冲发生器、控制矩阵、时钟脉冲发生器、复位电路和启停电路等控制逻辑。

PCD232A ABB 板卡扩展控制执行使用易操作实行

species

PCD232A101 3BHE022293R0101 No matter which kind of control unit, the principle is to control all parts 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 is executed through a simple digital path called a microsequencer (microcomputer).

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.

Feature

PCD232A101 3BHE022293R0101 It according to the user's pre-programmed program, take out each instruction from the memory in turn, put it in the instruction register IR, through instruction decoding (analysis) to determine what operation should be carried out, and then through the operation controller OC, according to the determined timing, to the corresponding parts of the microoperation control signal. The operation controller OC mainly includes the control logic of beat pulse generator, control matrix, clock pulse generator, reset circuit and power off circuit.

PCD232A ABB 板卡扩展控制执行使用易操作实行