General Description：
TT1620 is a LED Controller driver. Eight segment output lines, Six grid output lines, display
memory, pulse width control circuit, 3 wire interface circuit are all incorporated into a single chip
to build a highly reliable peripheral device for a single chip microcomputer.
Features：
? Display Mode：8 segment X 6 Grid
? 8 step Dimming adjustment
? Build-in RC oscillator
? Serial interface for clock, data Input/ output, strobe pins
? CMOS technology
? Low power consumption
? SOP20 package (TT1620)
.Pin Assignment：
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