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Understanding the Intel MCS-51 Microcontroller Family

Learn about the features of Intel MCS-51 microcontrollers, including 8-bit I/O ports, serial interface, external memory space, Boolean processor, and more. Customize connections between the processor and peripherals dynamically.

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Understanding the Intel MCS-51 Microcontroller Family

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  1. Hardware Source: ttp://www.edsim51.com/8051Notes/8051/8051Hardware.html under http://www.edsim51.com/8051Notes/index.html

  2. Intel MCS-51 family of microcontrollers • In addition: • four 8-bit input/output (I/0) ports • serial interface • 64K external code memory space • 64K external data memory space • Boolean processor • 210 bit-addressable locations • 4us multiply/divide

  3. Pinout

  4. Pins

  5. Port 3

  6. External RAM & ROM connection Sourced: Book: Architecture and programming of 8051 MCUs https://www.mikroe.com/ebooks/architecture-and-programming-of-8051-mcus/memory-organization

  7. External RAM & ROM connection Source: https://www.electronicshub.org/8051-microcontroller-memory-organization/

  8. External RAM & ROM connection Source: https://www.pjrc.com/tech/8051/pm2_docs/hardware.html

  9. Connection between the processor and the peripherals Click

  10. Explanation of the connection information Click

  11. Dynamic Interface Click This interface allows you to change the connection between the processor I/O pins and the peripherals.

  12. Reset to the default connection Under the edsim51 program directory (edsim51di), you can find the following three files in addition to directories ICP and lib: edsim51di.jar edsim51diHardwareSettings.ser edsim51diSettings.ser If you delete the two .ser files, any change in the circuit connection will be reset and the default connection will be resumed.

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