The HT68F2420 that adds up to peaceful how
HT68F2420 is really special apply to the small controller that the product transmits related all sorts of infrared ray (MCU) . This MCU is built-in high spirit spends oscillating circuit and circuit of drive of infrared glow diode definitely, because this is when circuit of design remote controller, do not need additional add oscillator and dynatron, saved the cost of exterior component greatly, raised fine rate of production.
About the HT68F2420 application in IR remote controller, its a few pivotal character and advantage include:
Essence of life spends definitely with match a gender: The oscillating circuit essence with built-in HT68F2420 is spent definitely very tall, can amount to 4MHz ± 0.4% . In the meantime, the generator that it cooperates to be able to adjust frequency of IR carrier wave built-inly (4kHz~1MHz) , can choose frequency of 4 kinds of common IR carrier wave (36/38/40/56kHz) , can move in-house oscillation frequency school in a few specific values (like 3.996/3.99/4.0/3.976MHz) , reduce the error that divide frequency effectively, make IR emits carrier wave frequency and frequency of IR receiver carrier wave more match, increase infrared ray to transmit a distance thereby.
Save electric effect: This MCU returns body to save report to be designed in its now in the application in the remote controller. The remote controller is in dormancy mode usually, use internal watchdog timer (WDT) wake up scanning key-press, achieve the result that omit report thereby. Through actual measurement, use CR2032 batteries, of the remote controller bide one’s time durable time is as long as 10 years of above, the infrared ray that this uses for long to need is a very significant advantage for the remote controller.
Enclose support with key-press: HT68F2420 offers a variety of enclosing to choose, include 20-pin NSOP/SSOP to enclose, can support 136 key at most. This makes it has bigger flexibility when the design has the infrared remote controller of complex key-press layout.
As a whole, HT68F2420 depends on his high spirit is spent definitely, match gender, province electric effect and be enclosed neatly and key-press support, make the good choice that designs infrared remote controller.