IC695PSA040

IC695PSA040, IC695PSA040, IC695PSA040, IC695PSA040, IC695PSA040, IC695PSA040 controller editing controller (English name: controller) refers to the change in a predetermined order the main circuit or control circuit wiring circuit and the change in the resistance value to control the motor starting, speed, brake and reverse the master device. By the program counter, instruction register, the instruction decoder, the timing generator and operating controller, which is an order of "decision-making body", to complete the operation coordination and command the entire computer system. Company: Hai-Kun Rui Automation Equipment Co., Ltd. Contact: Ye Lianhai QQ: 815194355 2096386796 Mobile: 13296063746 Zip Code: 201600 Telephone number: 021-60643746 Address: Shanghai Songjiang District of Shanghai Song Highway fax: 021-57880362 2511 1222 Room 411, Lane catalog 1 2 Principle 3 main categories common species? combinational logic? microprogram? CPU? LED? Access? electric car? fire alarm? pid? mother of? automatic transfer switch? Exercise? Micro Four new pattern of development the basic functions 5 1 main categories edit controller subassembly logic controllers and micro-program controller two controllers each have strengths and weaknesses. Combinational logic controller design problems, complex structure, once the design is complete, you can not modify or expand, but it's fast. Micro-controller design program easy, simple structure, it is easy to modify or expand, modify the function of a machine instruction, simply reprogram the corresponding micro-program; to add a machine instruction, just add some micro program control memory, However, it is through the implementation of a micro drive. Specific contrast as follows: a combination of hardwired controller logic controllers, also known by the logic circuit, relies entirely on hardware to implement the instruction function. 2 works edited magnechuck Controller: 380V AC voltage through the transformer after stepped down after rectified by the rectifier into a 110V DC via the control device into the sucker at this sucker is magnetized, which leads to the reverse voltage line when demagnetization, Controller at demagnetization function. Access Control: Access Controller to work under two modes. One is the inspection mode, the other is to identify patterns. In polling mode, the controller continuously sends query code to the reader, and the reader receives a reply command. This model will remain down until the reader senses the cards. When the reader senses the card, the card reader to the patrol command produces a different response in the reply command, the reader will read the card within the code data to the access control, make access control The controller into identification mode. In recognition mode access control, access control analyze Card ID, the same equipment stored card data for comparison, and the implementation of the follow-up action. After completion of action Access Controller to receive data, it sends a command reply card reader, so that the reader restore the state, while access control back to patrol mode. 3 common types of editor of logic design steps: 1, the design of the machine instruction: Specify the type of command, the format and function of each instruction number and instructions; 2, preliminary overall design: such as register settings, bus schedule, operation Design connected relationship between the components; 3, the drawing instruction flow chart: each instruction mark at what time, what part what to do; 4, choreography operating schedule: the decomposition of each operation flowchart according to the instructions for the micro operation, the micro-operation of the machine should be listed in chronological sections; 5, lists the micro-operation signal expression, simplifying circuit implementation. The basic components: 1, the instruction register is used to store the instruction being executed. Instruction is divided into two parts: the operation code and address code. Operation code used to indicate the nature of the operation instructions, such as addition, subtraction and the like; address code section gives instruction operand address or operand address information is formed (in this case to form an operand address forming circuit by address). There is a command called a branch instruction, which is used to alter the normal sequence of instructions, address code portion of this instruction is to be given to the implementation of the transfer instruction address. 2, the operation code decoder: used for instruction opcode is decoded to produce the corresponding control level, to complete the analysis of these instructions. 3, the timing circuit: signal for generating a time stamp. In the microcomputer, the time stamp signal is generally three categories: instruction cycle, bus cycle and clock cycle. Micro-operation command generation circuit generates a complete instruction specifies a variety of micro-ops command operations. Mainly based on the nature of the operation command is generated time stamp and instructions. The circuit is actually an expression of each micro-operation control signal (as in the above A → L expression) circuit which is a combination of logic controller is the most complex part. 4, the instruction counter: to the address of the next instruction to be executed is formed. Normally, instructions are executed sequentially, and instructions are stored sequentially in the memory. So, the next instruction to be executed under normal circumstances can be an address by the current address plus 1 form, micro-operation command "1" is used for that purpose. If the branch instruction is executed, the next instruction to be executed addresses are to be transferred to the address. The address on the address of the branch instruction code field, which was sent directly to the instruction counter. Proposed micro-program controller logic design because there is not a easy design, inflexible and difficult to modify and expand other shortcomings. Microprogram program control (referred microcode control) of the basic idea is: produce micro-operation microinstruction command, with a number of microinstructions composed some micro program implements a machine instruction function (to distinguish them from the front of the spoken instructions called machine instructions). M machine instruction set execution requires three stages, each stage of the need to issue the following command: Phase I send K1, K8 command, Phase II sent K0, K2, K3, K4 command, Phase III sent K9 command. When the first microinstruction to microinstruction register, the K1 and K8 micro instruction register is 1, K1 and K8 command is issued, the next microinstruction microinstruction pointed address 00101, and removed from the second microinstruction will be issued K0, K2, K3, K4 command to the micro instruction register, followed by taking third microinstructions, K9 send command. Composed of micro-program controller: 1, the control memory (contmlMemory) used to store machine instructions corresponding to each micro program. Decoder for forming machine instructions corresponding micro-program entry address. When each microinstructions one by one corresponding to a single machine instruction microprogram removed and sent to the microinstruction register, its micro-operation command will issue, according to previous design, therefore, a complete machine instruction function. For each machine instruction it is true. 2, the width of the microinstruction directly determines the width of the micro-program controller. In order to simplify the control memory, it can take some measures to reduce the width of the microinstruction. Decoding method using the field as a section decoder. Obviously, the microinstruction control field will be greatly reduced. Some micro-operation command to be generated simultaneously can not be arranged in the same field. In order to further reduce the control field, the field can also be designed to decode two or more stages.