Holtek Multichannel C / R-F Microcontrollers HT45R36
It is understood that, multi-channel C / R-F microcontroller HT45R36 is a ROM 2kx14, RAM is 120 bytes, I / O up to 9-port MCU. In addition, the HT45R36 provides 16 channel C / RF functions, two external interrupt pins that can be set to trigger status, and 8x8 high current output pins (Sink Current is 40mA @ 5V, Is -20mA @ 5V).
The Holtek HT45R36's C / R-F function is implemented using an internal oscillator circuit and a timer built into the MCU. When changing the equivalent resistance or the equivalent capacitance outside the oscillator, the output frequency of the oscillator will change, and then change the timer value; with the channel decoder to do multi-channel scanning, this HT45R36 can Knowing that the state of that channel is changed.
If you need high-current digital components, such as LED, LED dot matrix, 7-segment display, etc., you can also use this MCU direct drive, no need to increase the current drive transistor circuit, the PCB board space can be saved. Simplified circuit architecture.
The HT45R36 also features the same high-noise immunity as the other 8-bit Holtek MCUs, the Watchdog and LVR functions to enhance the MCU's anti-crash capability. HT45R36 package type for the 44QFP and 52QFP, the difference between the 52QFP more than 44QFP 2 I / O pins and 6 C / R-F channel. The product can be used in security applications, such as detection of doors and windows, intrusion detection, etc.; can also be applied to keyboard detection, such as fruit juice machine, range hood and so on.