The lower 128 units of 8051 on-chip RAM are divided into what three main parts?-EEWORLD

Collect

Question: What are the three main parts of the lower 128 units of RAM in the 8051 chip? What are the main functions of each part?
Answer: The division and main functions of the lower 128 units of RAM in the chip are as follows:

(1) Working register group (00H - 1FH)

This is an area directly addressed by registers, 0-31 of the internal data RAM area, a total of 32 units. It is 4 general working register groups, each group contains 8 8-bit registers, numbered R0-R7.

(2) Bit addressing area (20H-2FH)

16 byte units contain a total of 128 bits. These 16 byte units can be used for both byte addressing and bit addressing. They are mainly used for bit addressing.

(3) Stack and data buffer (30H-7FH)
is used to set up the stack and store data.

Reference address：The lower 128 units of 8051 on-chip RAM are divided into what three main parts?

Previous article：What is the initial state of each register after the 8051 microcontroller is reset?
Next article：What is the functional significance of each flag in the PSW register of the 8051 microcontroller?

Recommended ReadingLatest update time:2024-11-16 15:41

8051 MCU implements a single countdown timer with modifiable initial value (and command to start and stop)

Compared with Version 1.1, the strcmp() function in the string.h file is used to simplify the judgment of simple commands. #include STC89C5xRC.H #include string.h unsigned char code DIG_CODE = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f}; //The corresponding digital tube displays 0~9 char bu

[Microcontroller]

High-speed interface between C8051 and SRAM

The C8051 series microcontrollers do not have data buses (RD, WR, ALE) like the standard 51 microcontrollers, and can only use the general I/O port analog bus method to access external memory. Therefore, C8051 requires dozens of instructions to access external memory once. Even so, since most of the instructions of C80

[Microcontroller]

High-speed interface between C8051 and SRAM

Design of multi-node communication network based on CAN bus technology of C8051F040

introduction CAN bus is a serial communication network that effectively supports distributed control or real-time control. It is highly valued for its high reliability and good error detection capabilities. It is widely used in automotive computer control systems and industrial environments with harsh ambient te

[Microcontroller]

Design of multi-node communication network based on CAN bus technology of C8051F040

Modular design of multi-channel water immersion time recording circuit based on C8051F040

For the self-sinking system of a certain type of aircraft, it is necessary to know the corrosion time of a certain alloy material in seawater under different temperature conditions. A modular hardware design is adopted, using a water immersion sensor as the detection unit and the clock chip DS12887 as the timing modul

[Microcontroller]

Modular design of multi-channel water immersion time recording circuit based on C8051F040

Design of high-precision electronic load-bearing platform balance adjustment system based on C8051F040 single-chip microcomputer

Preface With the continuous development of modern science and technology, people have higher and higher requirements for the horizontal accuracy of various base platforms, and some existing optical instruments can no longer meet the requirements for the horizontal detection of some engineering, construction, l

[Microcontroller]

Design of high-precision electronic load-bearing platform balance adjustment system based on C8051F040 single-chip microcomputer

Design of environmental monitoring system based on ZigBee technology

0 Introduction All walks of life, especially in the fields of industrial and agricultural production, environmental monitoring, etc., have put forward great demands and higher requirements for wireless digital monitoring systems. The rapid development and gradual maturity of wireless sensor networks have better met

[Microcontroller]

Design of environmental monitoring system based on ZigBee technology

Using 74LS164 to expand C8051F's serial port output to parallel port output

System functions Use 74LS164 to expand the AVR's serial port output to parallel port output. hardware design Schematic diagram of the control circuit of the serial output expansion chip 74LS164 parallel output software design The following part is copied from TXT and copied to the web page. There are many spac

[Microcontroller]

Using 74LS164 to expand C8051F's serial port output to parallel port output

Serial interface between C8051F00x and HCMS 2964 display

introduction HCMS2964 is a new generation of dot matrix display produced by AGILENT TECHNOLOGIES. This product has a built-in CMOS integrated circuit that can drive LEDs and can be directly connected to the processor in serial to achieve data transmission. Because of its convenient and fast brightness adjustment, it

[Microcontroller]

Serial interface between C8051F00x and HCMS 2964 display

Popular Resources
Popular amplifiers