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8051 and microcontroller
51-FORTH is an implementation of the Forth programming language for the Intel 8051 microcontroller.
* Intel 8051 ( 1980 Harvard architecture microcontroller )
The Intel MCS-51 ( commonly referred to as 8051 ) is a Harvard architecture, single chip microcontroller ( µC ) series which was developed by Intel in 1980 for use in embedded systems .< ref > John Wharton: An Introduction to the Intel MCS-51 < sup > TM </ sup > Single-Chip Microcomputer Family, Application Note AP-69, May 1980, Intel Corporation .</ ref >< ref > John Wharton: Using the Intel MCS-51 < sup > TM </ sup > Boolean Processing Capabilities, Application Note AP-70, May 1980, Intel Corporation .</ ref > Intel's original versions were popular in the 1980s and early 1990s.
In many engineering schools the 8051 microcontroller is used in introductory microcontroller courses.
* Instruction set of 8051 microcontroller
Among the first of the AVR line was the AT90S8515, which in a 40-pin DIP package has the same pinout as an 8051 microcontroller, including the external multiplexed address and data bus.
Atmel introduced the first 8-bit flash microcontroller in 1993, based on the 8051 core.
The most common variants are LH 2. 2, which uses an Intel 8049 ( MCS-48 ) microcontroller, and usually a 4 kB programme memory, and LH 2. 4, which uses a Siemens 80535 microcontroller ( a variant of Intel's 8051 / MCS-51 architecture ) and 32 kB programme memory based on the 27C256 chip.
The ECU uses an Intel 8051 microcontroller, usually with 16 kB of program memory and usually no advanced diagnostics.

8051 and has
The lab has trainer kits like Z80, 8085, 8086, 80286, MC6800 ; dedicated controllers like 8051 ; circuit emulation equipments ; computer aided IC testing, and microprocessor based measuring equipment.
* IEEE: The college has an IEEE Student wing. The IEEE-MSRIT celebrates its tech fest Aavishkaar each year Various competitions such as Algomach ( On Spot Programming ), Design and Debugging ( Circuit debugging ), Robotics, Cyber Treasure Hunt ( CTH ), Paper Presentation, Gaming, Tech Quiz, Product Design, 8086 / 8051 Programming, Amazing Race, Photoshop Contest are held along with Workshops.

8051 and two
The original 8051 core ran at 12 clock cycles per machine cycle, with most instructions executing in one or two machine cycles.
Enhanced 8051 cores are now commonly used which run at six, four, two, or even one clock per machine cycle, and have clock frequencies of up to 100 MHz, and are thus capable of an even greater number of instructions per second.
The original Intel 8051 ran at 12 clock cycles per machine cycle, and most instructions executed in one or two machine cycles.

8051 and accumulator
Historically almost all early computers were accumulator machines ; and many microcontrollers still popular as of 2010 ( such as the 68HC12, the PICmicro, the 8051 and several others ) are basically accumulator machines.
Because the 8051 is an accumulator-based architecture, all arithmetic operations must use the accumulator, e. g. ADD A, 020h will add the value in memory location 0x20 in the internal RAM to the accumulator.

8051 and where
Several C compilers are available for the 8051, most of which feature extensions that allow the programmer to specify where each variable should be stored in its six types of memory, and provide access to 8051 specific hardware features such as the multiple register banks and bit manipulation instructions.
Because IRAM, XRAM, and PMEM ( read only ) all have an address 0, C compilers for the 8051 architecture provide compiler-specific pragmas or other extensions to indicate where a particular piece of data should be stored ( i. e. constants in PMEM or variables needing fast access in IRAM ).

8051 and second
With a 12 MHz clock frequency, the 8051 could thus execute 1 million one-cycle instructions per second or 500, 000 two-cycle instructions per second.

8051 and is
The embedded CPU family with the largest number of total units shipped is the 8051, averaging nearly a billion units per year.
The 8051 is widely used because it is very inexpensive.
The silicon cost of an 8051 is now as low as US $ 0. 001, because some implementations use as few as 2, 200 logic gates and take 0. 0127 square millimeters of silicon.
SAB-C515-LN by Infineon is based on the 8051
These registers also allowed the 8051 to quickly perform a context switch which is essential for time sensitive real-time applications.
Program memory is read-only, though some variants of the 8051 use on-chip flash memory and provide a method of re-programming the memory in-system or in-application.
An 8051 chip could be sold as a ROM-less 8031, as the 8051's internal ROM is disabled by the normal state of the EA pin in an 8031-based design.
The AVR Instruction Set is more orthogonal than those of most eight-bit microcontrollers, in particular the 8051 clones and PIC microcontrollers with which AVR competes today.
97 is a non-trivial factor of 8051.
* Also, a free compiler, Turbo51, is available for producing code for Intel 8051 chips.
The card is based on an 8051 processor with 3DES / AES crypto accelerator, making very fast transactions possible.

8051 and used
Other high level languages such as Forth, BASIC, Pascal / Object Pascal, PL / M and Modula-2 are available for the 8051, but they are less widely used than C and assembly.
This same feature was used to emulate the 8051 keyboard controller, serial port and numerous other I / O functions.

8051 and instructions
One does not need to master these instructions to program the 8051.

8051 and 16-bit
The 8052 was an enhanced version of the original 8051 that featured 256 bytes of internal RAM instead of 128 bytes, 8 KB of ROM instead of 4 KB, and a third 16-bit timer.

8051 and 8-bit
* Silicon Laboratories Pipelined 8-bit 8051 Microcontrollers and mixed-signal ARM-based 32-bit microcontrollers
The 8-bit Intel 8080 ( as well as the 8085 and 8051 ) microprocessor was basically a slightly extended accumulator-based design and therefore not orthogonal.
Their instruction sets vary from small 8-bit processors, such as the 8051 and PIC to 32-bit processors such as the ARM architectures or MIPS architectures.

8051 and on
One particularly useful feature of the 8051 core was the inclusion of a boolean processing engine which allows bit-level boolean logic operations to be carried out directly and efficiently on select internal registers and select RAM locations.
Many variants of the 8051 include the standard 256 bytes of IRAM plus a few KB of XRAM on the chip.
Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, and low unit cost.

8051 and .
Many microcontrollers are so quirky that they effectively require their own non-standard dialects of C, such as SDCC for the 8051, which prevent using standard tools ( such as code libraries or static analysis tools ) even for code unrelated to hardware features.
A long but still not exhaustive list of common architectures are: 65816, 65C02, 68HC08, 68HC11, 68k, 78K0R / 78K0, 8051, ARM, AVR, AVR32, Blackfin, C167, Coldfire, COP8, Cortus APS3, eZ8, eZ80, FR-V, H8, HT48, M16C, M32C, MIPS, MSP430, PIC, PowerPC, R8C, RL78, SHARC, SPARC, ST6, SuperH, TLCS-47, TLCS-870, TLCS-900, TriCore, V850, x86, XE8000, Z80, AsAP and others.
The 8051 architecture provides many functions ( CPU, RAM, ROM, I / O, interrupt logic, timer, etc.
With a single instruction the 8051 can switch register banks as opposed to the time consuming task of transferring the critical registers to the stack or designated RAM locations.
Features of the modern 8051 include built-in reset timers with brown-out detection, on-chip oscillators, self-programmable Flash ROM program memory, built-in external RAM, extra internal program storage, bootloader code in ROM, EEPROM non-volatile data storage, I²C, SPI, and USB host interfaces, CAN or LIN bus, PWM generators, analog comparators, A / D and D / A converters, RTCs, extra counters and timers, in-circuit debugging facilities, more interrupt sources, and extra power saving modes.
There are various high-level programming language compilers for the 8051.

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