ST2602B Overview
The clock of LCD (LCDCK) is not only sourced from main-frequency (OSC), it can also be sourced by OSCX (32KHz crystal) to make current consumption to be minimum. Besides, Vlcd has excellent voltage variation when Vdd changes from 2.4V to 3.6V. Further more, ST2602B has inside trimming fuse function for Vlcd and LVD.So every ST2602B real-chip will have almost the same default Vlcd and LVD voltage.
