The ISH72328-S is an LED Display and Keyboard Controller driven on a 1/16 to 14/16 duty factor. 10 segment output lines, 7 grid output lines, one display memory (14 bytes), control circuit key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip micro controller. Serial data is fed to ISH72328-S via a four-line serial interface / 2 wire I²C interface.