Memory card is most commonly used in Siemens PLC system

With the in-depth study of Siemens system, we come into contact with more and more systems, 200, 300, 400 and 1200, 1500 series. The memory cards used in these systems are also different. Today, let’s talk about the memory cards used in these systems. 1、 The memory card used by 200 CPU is EEPROM external […]

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Analysis of two functions of P3 port of 8051 single chip microcomputer

The P3 port has two functions In addition to being used as I / O (with pull-up resistor inside), there are some special functions, which are set by special registers. For specific functions, please refer to our pin description later. Single chip microcomputer chip with internal EPROM (e.g. 8751) provides special programming pulse and power […]

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How to encrypt HCS12 Series MCU

In HCS12 Series MCU, encryption can be divided into two methods: complete encryption and encryption using password. These two encryption methods are used in different occasions according to the needs of users. Full encryption The so-called complete encryption is to completely protect the chip and shield all read operations of the chip. In MC9S12DP256, encryption […]

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Memory chip manufacturer puran shares spurred the explosive growth of NOR Flash

The “core” layout of science and technology innovation board may add a new army. Recently, the Shanghai stock exchange accepted the application for science and Technology Innovation Board of Pran semiconductor (Shanghai) Co., Ltd. (hereinafter referred to as Pran). Pran’s main business is the design and sales of nonvolatile memory chips. The company plans to […]

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What is EPROM and EEPROM memory

First of all, look carefully. EPROM and EEPROM are different. EPROM is erasable programmable read only memory, which means “erasable programmable read only memory” in Chinese. It is a kind of rewritable memory chip, and its contents will not be lost when power down. In other words, it’s nonvolatile. It is programmed by EPROM programmer, […]

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An analysis of EEPROM and EPROM

First of all, look carefully. EPROM and EEPROM are different. EPROM is erasable programmable read only memory, which means “erasable programmable read only memory” in Chinese. It is a kind of rewritable memory chip, and its contents will not be lost when power down. In other words, it’s nonvolatile. It is programmed by EPROM programmer, […]

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Design and development information of embedded system

Background of embedded system design method change Generally speaking, the evolution of embedded system design method is due to the traction of application requirements and the promotion of IT technology. With the continuous innovation and development of microelectronics technology, the integration degree and process level of LSI are constantly improved. The combination of silicon materials […]

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What is the difference between EEPROM and flash in SCM

1. EEPROM introduction Electrically erasable programmable read only memory Development process: ROM –, prom –, EPROM –, EEPROM 2.EEPROM Difference with flash 2.1 differences in use Flash is used to store programs and cannot be changed during program operation. Our program is burned to flash; Ram is used as the data memory when the program […]

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