CH450 Unknown Manufacturer Datasheet

CH450 Key Features

• Set display current drive layer internal, the segment current is no less than 15mA, the word current is no less than 80m
• Dynamically display scan control, directly drive six bits numeric LEDs or forty eight LEDs
• Set forty eight keys keyboard controller internal, basic on 8×6 matrix keyboard scan
• Set pull-down resistor internal on the key pressed station, and set eliminate dithering circuit internal
• Supplies keyboard interrupt active with low-level, supplies key-press release sign bit, to detect key is pressed or rele
• High-speed two wires serial interface, the speed of clock varies from 0 to 4MHz,patible with two wires I2C bus, save pin
• Set clock surge circuit internal, the outside supplies clock or surging equipments is no need, stand against disturbing
• Set clock surging circuit internal, don’t need outside to provide clock or connect surge device, anti-jamming capability
• Set power-on reset internal, supplies reset output active with high-level to MCU
• Supplies DIP20 and SOP20 package without lead, patible with RoHS, the function and pins are patible with CH455 in some p