Is there any difference between an IO processor and an IO processor? Are the two the same concept?

In a microprocessor system, the memory unit and the IO port are distinguished by different address codes.

1.Independent addressing (dedicated IO port addressing) – The memory and IO ports are in two separate address spaces.

1) Advantages: the address code of the IO port is short, the decoding circuit is simple, the operation instructions of the memory are different from the IO port, and the program is relatively clear; The control structures of the memory and IO ports are independent of each other and can be designed separately.

2) Disadvantages: There is a need for special IO instructions, and the flexibility of program design is poor.

2.Unified addressing (memory image addressing) - The memory and the I-o port share a unified address space, and when an address space is allocated to the I-o port, the memory can no longer occupy this part of the address space.

1) Advantages: There is no need for special IO instructions, any instructions for operating memory data can be used for data operation on IO ports, and the program design is more flexible; Since the address space of the I.O. port is part of the memory space, the address space of the I.O. port can be large or small, making the number of peripherals virtually unlimited.

2) Disadvantages: The IO port occupies a part of the memory space, which affects the memory capacity of the system; Accessing the IO port is the same as accessing memory, because the memory address is longer, which increases the execution time.

The processor includes the processor, so to speak.

It's write and read.

Writes are rarely used.

Generally read more.

So the reading speed is more important.

Good luck.

Write is the register of data stored in the port, which is output through the port pins to drive the peripheral circuitry, and read is the external state is stored in the chip through the port pins for analysis. The two are not the same.

The terminal is something similar to ADSL and set-top boxes. Generally, it is used in system terminology, and the device at the end of the network or system corresponds to the front-end or central office equipment. i o is generally a term for hardware.

It is an input and output interface. The meaning is rather broad. For example, the link between the host and the display is a manifestation of the IO.

A terminal is a device, if the first machine. The IO port is: then take the ** machine to say, there is a single-chip microcomputer in the ** machine equipment, and there is an IO port on the single-chip microcomputer, and the software can control the IP port of the single-chip microcomputer to achieve certain functions. Hope it helps.

The multi-channel count of distributed IOs ensures the flexibility of the data transmission system, supporting the allocation of parameters, programming, commissioning, and diagnostics.

Distributed IO devices (input and output) operate locally and are powerful, with their high data transmission rate, ensuring smooth communication between the PLC remote controller and the IO device.

Distributed IO is well compatible, and expands the distributed IO system of other buses, which can also help you manage your distributed remote devices more rationally, and the supporting software can help you configure, debug, and diagnose your system.

Local IO, distributed IO or remote IO are literally easy to understand. Now that distributed IO already supports multi-bus protocols, the trend is towards Ethernet-based industrial buses. Foreign mainstream manufacturers such as Siemens, Beckhoff, Omron, Mitsubishi, etc., and there are also a few good ones in China, with integrated and expandable card types.

Distributed IO, as the name suggests, is an IO module that can exist independently from the CPU, and generally has a built-in CPU for AD conversion and communication. The IO module of the PLC must depend on the CPU module.

The most common IO modules in China are Advantech's ADAM 4000 and ADAM 8000 series. Among the many IO modules of many manufacturers, the most widely used communication protocol should be Modbus.

Isolation in Isolation means that one part of the circuit is not connected to another part of the circuit (i.e., the copper wires of the PCB).

In this way, the safety of the board can be ensured, when there is a large voltage from the outside, there is no circuit connection, at most it will burn out a part of the circuit outside the board, but will not burn the internal circuit of the board or even the whole system.

I want to share.