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The Intel MCS-51 (commonly termed 8051) is a single-chip microcontroller (MCU) series developed by Intel in 1980 for use in embedded systems. The architect of the Intel MCS-51 instruction set was John H. Wharton. [1] [2] Intel's original versions were popular in the 1980s and early 1990s, and enhanced binary compatible derivatives remain ...
An AT89c2051 microcontroller in circuit. The Atmel AT89 series is an Intel 8051-compatible family of 8 bit microcontrollers (μCs) manufactured by the Atmel Corporation.. Based on the Intel 8051 core, the AT89 series remains very popular as general purpose microcontrollers, due to their industry standard instruction set, their low unit cost, and the availability of these chips in DIL (DIP ...
MCS-51 8051 family – also incl. 8X31, 8X32, 8X52; X=0, 3, 7 or 9; MCS-151 High-performance 8051 instruction set/binary compatible family; 8/16-bit/32-bit. MCS-251 32-bit ALU with 1/8/16/32-bit CISC instruction set and 24-bit external address space (16-bit wide segmented). Fully binary compatible to the 8051 8-bit family. 16-bit
Primary competitors include the somewhat similar [note 3] Microchip Technology PIC family, and all Intel 8051 descendants. Also more traditional von Neumann architecture based single chip microcontrollers may be regarded as competitors, such as the Motorola 6800 , 6809 based Motorola 68HC11 , the Hitachi H8 family, and Z80 -derivatives, such as ...
The designers worked closely with compiler writers at IAR Systems to ensure that the AVR instruction set provided efficient compilation of high-level languages. [7] 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.
Some SFR bits may be set directly using SETB/LDB instructions on the SFR's address, whereas others may require usage of specific instructions. The Intel 80196 class microcontroller has 24 SFRs, each 1 byte in size; standard Intel 8051 chips have 21 SFRs.
The first round of the new 12-team College Football Playoff format is set to ignite the field on Friday, Dec. 20 with a primetime game. This marks the beginning of an intense postseason, where ...
The microcontroller's oscillator block divides the clock input frequency by three and then further divides the result into five machine states. Using the 11 MHz maximum crystal frequency will produce 0.73 MIPS of single-cycle instructions. Some 70% of instructions are single byte and single cycle ones, but 30% need two cycles or two bytes, so ...
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