The HOLTEK series is primarily the 8/16 bits micro controller IC, also in the micro controller peripheral IC. Specifications Includes internal clock (HT48XX) Industrial standard-40? to +85? Up to 56 I/O (HT48XX) Highly anti-noise, Highly anti-static Supports UART (HT48XX) Wide voltage operation 2.2V to 5.5V Supports I2C (HT46R2X ,HT46R47) OTP/MASK compatible Supports USB , PS/2 (HT82XXX ) Up to 4 - 8 bits PWM output (HT46XX ) USB1.1 compatible for all low-speed applications (HT82XXX) Up to 160 LCD pix display (HT46XX ) Up to 6 channels 8 bits A/D converter (HT46XX) Up to 8 channels 10 bits A/D converter ( HT46XX ) Applicable for consumer electronic products, LCD electrical appliances, automobile peripherals, computer peripherals and so on .