inside

What's inside the 8051:

1. core, including the internal RAM (and ALU, memory controller, instruction decoder etc. - all this normally hidden to the user) - this is the part which executes the program (see SW model )
2. program memory - if it is EPROM or FLASH, we can burn the program into it
3. peripherals - core accesses them via SFRs:
   • timers/counters?
   • UART?
   • inputs/outputs? (IO)
   • interrupts?
4. reset? logic
5. clock? circuits (incl. oscillator)
6. external memory? interface