C51 pin function definition, internal block diagram-EEWORLD

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Keywords：C51 Reference address：C51 pin function definition, internal block diagram

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Recommended ReadingLatest update time:2024-11-16 15:42

How does Keil C51 support double data pointers and what are the special requirements?

In the 8051 system, the data pointer DPTR is used as a special 16-bit register for addressing the 64 KB XDATA or CODE space. It is usually used as a 16-bit pointer pointing to a constant table. Double data pointers can improve performance when two 16-bit pointers are used at the same time. As an enhanced feature, ther

[Microcontroller]

How does Keil C51 support double data pointers and what are the special requirements?

C51 plays 8x8LED dot matrix: PointGame

** Preface ** After I borrowed my classmate's CD-ROM drive to copy the files from the CD, I started to try to play with the microcontroller. What is difficult at the moment is the use of 8X8Led dot matrix, as it seems like there are too many components. 我用的是普中科技HC6800-ES V2.0的开发板，很多人说什么普中垃圾，我觉得还是他们自己C语言和数电等知识还没弄懂之类的

[Microcontroller]

Introduction to intrins.h

In C51 MCU programming, the functions in the header file INTRINS.H will make it as easy for you to use as in assembly. Internal function description _crol_ Characters rotate left _cror_ Characters rotate right _irol_ Integer circular left shift _iror_ Integer rotate right _lrol_

[Microcontroller]

C51 program for single chip decoding universal infrared remote control

How to use: Open the serial port debugging assistant and set it to 9600 bps. The microcontroller uses a 11.0592MHz crystal oscillator. Use sm0038 or other types of infrared receivers to connect according to the following circuit, where out is directly connected to the p3.2 pin of the microcontroller. Press the r

[Microcontroller]

C51 program for single chip decoding universal infrared remote control

The difference between C51 MCU and AVR MCU

1. AVR is a RISC structure CPU, most instructions are completed in one clock cycle. So MIPS is higher than 51 2. The reset level of the AVR microcontroller is negative logic, while 51 is positive logic. 3. The assembly program is not universal, but the program written in C can still be transplanted. AVR mic

[Microcontroller]

C51 MCU Learning Notes (I) - Building Development Environment and Burning Tools

1. Build and use the software development environment (Keil uVision) Currently, Keil uVision2, Keil uVision3, and Keil uVision4 are commonly used. These software can be easily downloaded on the Internet. I use Keil uVision4 here. ** 1. Create a project: (Take lighting up a light-emitting diode as an example) Click P

[Microcontroller]

C51 MCU Learning Notes (I) - Building Development Environment and Burning Tools

The real number storage format defined by float in C51

The floating-point numbers in C51 are represented by the IEEE-754 standard, with a storage length of 4 bytes, which contains 3 bit fields: the sign, the exponent, and the mantissa. (1) Single-digit symbol: D31 (2) 8-bit exponent: D30----D23 (stored in two’s complement form), where D30 is the sign bit. Different from t

[Microcontroller]

The growth path of single-chip microcomputers (51 basics) - 008 C51 identifiers and keywords

The standard C language defines 32 keywords, as shown in the following table (32 keywords of ANSI C): 　　C51 has expanded the functions of the microcontroller on this basis. For details, see the following table (C51 compiler expanded keywords): C 51 Data Types The memory types of the C language used by the 51 mic

[Microcontroller]

The growth path of single-chip microcomputers (51 basics) - 008 C51 identifiers and keywords

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