What is the basic function of the inverter compressor controller?

Release Time:

2022-03-10 09:25

What is the basic function of the inverter compressor controller?

Data buffer of the inverter compressor controller: The speed of the I/O device is low, and the speed of the CPU and memory is high, so it is necessary to install a buffer on the controller. When outputting, use this buffer to prepare data for high-speed transfer from the host, and then transfer the data in the buffer to the I/O device at the speed of the I/O device. When inputting, the buffer is used to temporarily store the data sent from the I/O device. After receiving the data, the data in the buffer will be transferred to the host at high speed.

Error control of the inverter compressor controller: The device controller also performs error detection on the data sent by the I/O device. If the transmission finds an error, it will usually place an error detection code and report it to the CPU. The CPU will discard the data transmitted this time and transmit it again. This ensures the accuracy of data entry.

Data exchange refers to the exchange of data between the CPU and the controller, and between the controller and the device. In the former case, data is written in parallel from the CPU to the controller or read in parallel from the controller through the data bus. In the latter case, the device inputs data into the controller or transmits data from the controller to the device. To do this, a data register needs to be set on the controller.

Status description identification and reporting: The status controller of the device records the status of the device so that the CPU can understand it. For example, only when the device is ready to transmit, the CPU can start the controller to read data from the device. To this end, a status register is provided on the controller to reflect the status of the device in each bit. The CPU reads the contents of the register and knows the state of the device.

Receive and recognize commands: The CPU can send various commands to the controller, and the device controller can receive and recognize these commands. To this end, the controller has corresponding control registers to store the received commands and parameters and to decode the received commands. For example, a disk controller can receive 15 different commands sent by the CPU, including Read, Write, and Format, some of which have parameters. Therefore, the disk controller has a plurality of registers, a command decoder, and the like.

Address identification Just as all units in the memory have addresses, all devices in the system also have addresses, and the device controller can identify the address of each device controlled. In addition, in order to enable the CPU to write or read data in the registers, these registers have addresses.

What is the design phase of the inverter compressor controller?

1. Design the machine's command system: specify the type of command, the number of commands, the format and function of each command.

2. Preliminary overall design: register setting, bus layout, arithmetic unit design, connection between components, etc.

3. Drawing command flow chart: shows when each command is executed and which parts perform what operations.

4. Job scheduling: Break down each job into fine jobs according to the command flowchart, and list the fine jobs that the machine needs to perform at different times.

5, list the micro-operation signal expression, simplification, circuit implementation.