Gaming Keyboard HT66FB550 Characteristics 4K / 8K / 16K 16 Flash type MCU 512 / 768 / 1024 Bytes Data Memory USB 2.0 Full Speed Compatible Supports 4 / 6 / 8 Endpoints Supports 3.3V LDO and internal UDP 1.5K pull high 3.3V resistor Integrated HIRC 12MHz OSC with 0.25% accuracy for USB mode Timer Module PWM output mode used for driving RGB LEDs 2 Integrated Dual SPI and I C Serial Interface Supports In System Programming – ISP Integrated 16-channel 12-bit ADC Integrated Dual Comparators Integrated RTC 32768Hz Oscillator ICP Interface USB Connector HT66FB550 RGB LED Drive circuit Application Areas Wired Gaming Mouse, Keyboard, Wireless USB Dongle, USB Toys, USB Key, USB Remote, TV Game Products, PC Peripheral Products, etc. Application Circuit USB Circuit 3 Lock LED Circuit HT66FB550 Circuit RGB LED Lighting Circuit Debug & Programming Interface 8x18 Key Matrix Connector