In Chapter 19, our focus was on the programming aspects of 8051. Once that chapter
is understood thoroughly, it becomes very easy to move on to the hardware features of
8051.
Any microcontroller needs to place most of its focus on interfacing with peripher-
als. External peripherals are to be controlled by programs tested and finally ‘burned’ in
the ROM of the microcontroller. All microcontrollers have a number of inbuilt periph-
eral controllers (they are called peripherals, however), and the more advanced ones have
more of these peripherals. The 8051 has timers/counters, interrupts and serial communi-
cation interfaces as the main inter ...
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