TT1668 Overview
Description
TT1628(SOP 28) / TT1668(SOP 24) is an LED Controller driver with key scan function. Ten segment output lines, four grid output lines, Three segment/grid output lines , display memory, pulse width control circuit , key scan circuit , 3 wire interface circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer.
Key Features
- STB I Serial Interface Strobe Pin The data input after the STB has fallen is processed as a command
- When this pin is HIGH", CLK is ignored
- K1 ~ K2 Key Data Input Pins The data sent to these pins are latched at the end of the display VDD P SEG1/KS1 ~ O cycle
