Category:8051 Assembly: Difference between revisions
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{{Stub}}{{language}}
{{language programming paradigm|Imperative}}
{{assembler language}}[[Category:Assembly]]
'''8051 Assembly''' is the [[Assembly|assembly language]] used by the [[wp:Intel_MCS-51|Intel 8051 (MCS-51)]] microcontroller, and its many derivatives. This 8-bit microcontroller is very popular because of its
Many
The 8051 has greatly increased in performance. Modern derivatives can perform over 400 times faster than the first ones ever could. 8051s exist nowadays in many embedded systems because they are smaller and use less power when compared with a 32-bit processor.
Original 8051 features:
* 12 oscillator periods per machine cycle
* 1 or 2 machine cycles per instruction (with the exception of MUL and DIV - both 4 machine cycles)
* Four 8-bit bidirectional I/O ports
* 128 bytes of internal RAM
* Two 16-bit timers
* Two-level priority interrupt
* Six interrupt sources
* Full-duplex [[wp:Universal_asynchronous_receiver/transmitter|UART]]
* No [[wp:Watchdog_timer|watchdog]]
Derivatives exist that alter many or all features listed above.
Useful links:
* [http://www.keil.com/dd/docs/datashts/intel/ism51.pdf Instruction set]
* [http://www.8052.com/tutintro.phtml Basic tutorial]
* [http://plit.de/asem-51/ Freeware assembler]
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