In computers, for ease of management, the execution process of an instruction is often divided into several stages, and each stage completes a task. For example, fetching instructions, memory reading, memory writing, etc., each of these tasks is called a basic operation. The time required to complete a basic operation is called a machine cycle. Generally speaking, a machine cycle consists of several S cycles (state cycles). A machine cycle of the 8051 series microcontroller consists of 6 S cycles (state cycles). As mentioned earlier, a clock cycle is defined as a beat (represented by P), and two beats are defined as a state cycle (represented by S). The machine cycle of the 8051 microcontroller consists of 6 state cycles, that is, one machine cycle = 6 state cycles = 12 clock cycles. See the timing diagram below.
Picture 1
Previous article：The definition and function of three buses
Next article：What is the clock cycle of a microcontroller?
- Popular Resources
- Popular amplifiers
IR9084N
- Download from the Internet--ARM Getting Started NotesA brief introduction: From today on, the ARM notebook of the rookie is open, and it can be regarded as a place to store these notes. Why publish it? Maybe you are interested in it. In fact, the reason for these notes is ...
- Learn ARM development(22)Turning off and on interrupts Interrupts are an efficient dialogue mechanism, but sometimes you don't want to interrupt the program while it is running. For example, when you are printing something, the program suddenly interrupts and another ...
- Learn ARM development(21)First, declare the task pointer, because it will be used later. Task pointer volatile TASK_TCB* volatile g_pCurrentTask = NULL;volatile TASK_TCB* vol ...
- Learn ARM development(20)With the previous Tick interrupt, the basic task switching conditions are ready. However, this "easterly" is also difficult to understand. Only through continuous practice can we understand it. ...
- Learn ARM development(19)After many days of hard work, I finally got the interrupt working. But in order to allow RTOS to use timer interrupts, what kind of interrupts can be implemented in S3C44B0? There are two methods in S3C44B0. ...
- Learn ARM development(14)
- Learn ARM development(15)
- Learn ARM development(16)
- Learn ARM development(17)
Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
- LED chemical incompatibility test to see which chemicals LEDs can be used with
- Application of ARM9 hardware coprocessor on WinCE embedded motherboard
- What are the key points for selecting rotor flowmeter?
- LM317 high power charger circuit
- A brief analysis of Embest's application and development of embedded medical devices
- Single-phase RC protection circuit
- stm32 PVD programmable voltage monitor
- Introduction and measurement of edge trigger and level trigger of 51 single chip microcomputer
- Improved design of Linux system software shell protection technology
- What to do if the ABB robot protection device stops
- Huawei's Strategic Department Director Gai Gang: The cumulative installed base of open source Euler operating system exceeds 10 million sets
- Download from the Internet--ARM Getting Started Notes
- Learn ARM development(22)
- Learn ARM development(21)
- Learn ARM development(20)
- Learn ARM development(19)
- Learn ARM development(14)
- Learn ARM development(15)
- Analysis of the application of several common contact parts in high-voltage connectors of new energy vehicles
- Wiring harness durability test and contact voltage drop test method
- Regarding proteus simulation, it should be considered a circuit problem
- cadence ic design teaching
- TMS320C6748 DSP Development Kit
- TI CC1310 Problem Summary
- EV-HC32F460-GPIO Introduction and Debugging
- UC2844 and single-ended flyback switching power supply
- Thank you everyone, Shenzhen Xiaohua is back
- Popular Science: Discover How Smart Homes Work
- Is there any example of Cadence signal integrity?
- MSP430 ADC conversion + mean filter
京公网安备 11010802033920号