Embedded System Components Video Lecture | Embedded Systems (Web) - Computer Science Engineering (CSE)

hello I'm Sandia Devi going to discuss a
topic on embedded system hardware
components
the calm the topic will be discussed
with a block diagram and will be
concentrating on four important
components say processor or controller
system timers real time clocks resets
and memory the rest of the components
will be discussed in the next part the
book reference which I have used for
this particular topic embedded systems
architecture programming and design by
author Rajkumar an outline of the
embedded hardware components is shown
here where it consists of processors
processor timers ports memory input
devices output devices supply reset
circuitry oscillator security and system
application specific circuits
so how to decide
if we need a processor or a controller
for an application usually processor
will be used when large embedded
software has to be located in external
memory chips it is useful in designing
sophisticated embedded system whereas a
controller will be used if the
application requires the support of on
chip functional units such as timer ADC
can nodes etc or a controller can also
be used to design a simple application
any embedded system mandatorily requires
at least one timer to schedule the
various tasks for real-time program so a
system clock is also used to drive
timers for internal and external
counting operations as needed by these
system reset circuitry is another major
compact major hardware component which
when activated after a fixed period it
itself gets deactivated to let the
program proceed from default beginning
address that is the reset circuitry or
the researcher queue changes the program
counter to a powerup default value for
example if a system program or system
boot-up program or initialization
program is getting executed then the
program by default it will start from
the powerup default file one main
research circuitry is watchdog timer
which is used to reset the system after
a predefined timeout this watchdog timer
this is reset circuitry which is used
when the embedded system or the system
structs up stuck some
the next main component is memory which
is used to embed buta programs tasks
programs data's initialization data is
us temporary data runtime data stack
etcetera
so all these information will be
embedded in various types of memory
application program from which the
processor is looking for an instruction
code will be stored in either wrong
EEPROM or flash ROM EEPROM and flash can
also be used to store autos related
programs is us codes for system startup
etc similarly RAM is used to store stack
which holds temporary value e square
prom or flash will be used to store
normal I tell results of processing
catch memory again will be used if the
application is looking for specific data
or instruction in advance from external
location that is external memory chip
and the results temporarily will be
stored during runtime the rest of the
components will be discussed in the next
part thank you