8085 microprocessor

Song Baohua talks about the basic concepts of arm's embedded Linux porting experience 1. IntroductionArm is short for Advanced RISC Machines (a processor of advanced and streamlined command systems). It is a microprocessor intellectual property (IP) Core provided by arm.Arm has been applied in various product markets, including industrial control, consumer electronic products, communication systems, network systems, and wireless systems. ARM-based

requirements will not change, otherwise, at least reserve enough spare Rom space for possible changes.In most cases, we can try to write some program code in the Rom to observe the space occupied by the Code. For a microprocessor system with an internal ROM, system programs can only occupy limited program memory space. D. Experience: Rom is similar to RAM usage, and the program code length is related to the selected development language. For example,

discuss the functional features shared by all PC architectures, without introducing the technical details of specific bus types. The data path between the CPU and the I/O device is usually called the I/O bus. The 80x86 microprocessor uses a 16-bit address bus to address I/O devices, and uses an 8-bit, 16-bit, or 32-Bit Data Bus to transmit data. Each I/O device is connected to the I/O bus sequentially. This connection uses a hardware organization lev

backend design and chip manufacturing processes are high. As a result, CMP becomes the "future" high-performance processor structure that is first applied to commercial CPUs. Although the increasing integration of multi-nuclear power brings many benefits, the chip performance is multiplied, but it is obvious that some of the original system-level problems are introduced into the processor. 1-core structure: homogeneous or heterogeneous The components of CMP are divided into two categories: homo

2. Four laws that are still valid IT practitioners know the famous Moore's Law and Bell's law. These two laws complement each other, the former determines that the speed of the microprocessor will double every 18 months, while the latter believes that if the computing power remains unchanged, the price and size of the microprocessor will be halved every 18 months, this means that at the same price, the spee

-based data tables. The hard part of the RoM space capacity required for prediction is the length of the prediction program code. The solution to this problem can only improve the prediction accuracy with the gradual accumulation of experience.However, the most important thing is not to accurately calculate the code length of a program, but to clearly estimate the upper limit of the code length. According to experience, if 80% of the RoM space is occupied by code, it will be too crowded unless i

sliceTransfer Scheduling Method. But all UC/OS-II function calls and the execution time of the service are known, that is, the execution time of the uC/OS-II system service does not depend on the number of application tasks. AnotherIn addition, each task in uC/OS-II has its own stack, the size of each stack can be allocated according to the needs of the application, which lowers the system's demand for RAM; in terms of interrupt management, uCAn interruption in the/OS-II can suspend ongoing tas

1. What is an interface? The interface is the connection component between the microprocessor CPU and the external world. It is a transfer station for information exchange between the CPU and the external world. 2. Why do I need to set interfaces between the CPU and peripherals? There are four main reasons for setting interfaces between the CPU and peripherals: (1) signal incompatibility between the CPU and peripherals, including Function Definition,

Hardware Design of Four-channel Ultrasonic Flaw Detection card [Date:] Source: Electronic Technology Application Author: Meng Linggang, Song guangde [Font:Large Medium Small] 　 The overall structure of a four-channel Ultrasonic Flaw Detection cardFigure 1 shows the overall structure of the Four-channel Ultrasonic Flaw Detection card. It can be seen from the diagram that it is mainly composed of ultrasonic emission circuit, channel selection, amplification and filtering, data

memory to handle a variety of hardware. In addition, the software upgrade is more modular. You can upgrade the application and load the driver on flash during system running. The configuration information and running time parameters can be stored as data files in flash. 3 Implementation Scheme of embedded Industrial Control Network The Industrial Control System Based on Embedded linux runs the embedded Linux operating system with the embedded microprocessor