<h2>Power saving mode Microcontrollers</h2>
<ul>
 	<li>Why is reducing power consumption is important?</li>
 	<li>Hardware vs. Software methods</li>
 	<li>The need to balance power</li>
 	<li>consumption with performance needs</li>
 	<li>!Examples</li>
</ul>
<div id="ritekit-alerts"><img class="alignnone wp-image-2982" src="http://www.eduengteam.com/wp-content/uploads/2020/04/power1-300x208.png" alt="Power saving mode Microcontrollers" width="499" height="346" /></div>
<div><img class="alignnone wp-image-2983" src="http://www.eduengteam.com/wp-content/uploads/2020/04/power2-300x204.png" alt="Power saving mode Microcontrollers" width="496" height="337" /></div>
<div><img class="alignnone wp-image-2984" src="http://www.eduengteam.com/wp-content/uploads/2020/04/power3-300x206.png" alt="Power saving mode Microcontrollers" width="498" height="342" /></div>
<div><img class="alignnone wp-image-2985" src="http://www.eduengteam.com/wp-content/uploads/2020/04/power4-300x226.png" alt="Power saving mode Microcontrollers" width="498" height="375" /></div>
<div></div>
<h1>How to Save Power</h1>
<ul>
 	<li>!Power Down Modes</li>
 	<li>!Clocking Systems</li>
 	<li>!Interrupts</li>
 	<li>!Peripherals</li>
</ul>
<div></div>
<h2>POWER-DOWN MODES</h2>
<div>  A most important feature to meet current-budget
  Control clock frequency  POWER-DOWN MODES
  Control CPU power</div>
<div></div>
<h2><strong>CLOCKING SYSTEMS </strong></h2>
<div>  Microcontrollers may enter and exit low-power modes several times per second
  Current is wasted while CPU waits for stable clock
  Most low-power MCUs have “instant on clocks”</div>
<div></div>
<h2>INSTANT-ON CLOCKS</h2>
<div>  Some ready for CPU in less than 10-20us
  Some have two-stage clock wake up
  Provides a low freq. clock while high freq. clock  stabilizes
  Can take 1ms longer
  On these devices,CPU may be operational in 15us
  But runs on an incorrect frequency
  CPU consumes less current at low frequencies
  Inaccurate frequency can relate to inaccurate timing
  If accurate timing is necessary,the CPU must wait for the clock to stabilize.</div>
<div></div>
<h2><strong>INTERRUPTS </strong></h2>
<div>

  Goes hand in hand with system clock flexibility
  Bring MCU out of low-power mode
  More interrupts,more currentsaving flexibility

  Without interrupt capability,MCU must poll the keypad or buttons often
  Controlling polling requires a timer
  Additional current INTERRUPTS
  With interrupts,CPU can sleep until a button is pushed

</div>
<h2>WHAT ARE MCU PERIPHERALS?</h2>
Peripherals are components on a chip which have programmable input/ output capability
  Examples:
  Timers
  Event Counters
  PWM generators
  ADC/DAC
<h2>LOW POWER PERIPHERALS</h2>
  Some MCUs don’t have low power peripherals
  Two types of low power peripheral ability
  Individual enable/disable
  Automatic enable/disable
  A true low-power peripheral is one that consumes no current when not in use
<h2>SPECIAL DETAILS OF POWER SAVING ON MCUS</h2>
In today’s battery-driven world,power saving is a must for many consumer-based applications
  Most modern-day microprocessors/controllers have a variety of onboard power-saving features
  Compare TI vs. Microchip
  TI
  MSP430 Line of “Ultra Low Power MCU’s”
  Microchip
  PIC nanoWatt eXtreme Low Power MCU’s

Refer to Microchip <a href="https://www.microchip.com/">website</a> for more information about different MCU's

<a href="http://www.eduengteam.com/wp-content/uploads/2020/04/Technical_Lecture.pdf">Technical_Lecture</a>

For more Embedded Systems and Circuit,design tips visit <a href="https://www.eduengteam.com/">https://www.eduengteam.com/</a>
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