This part is a kind of semiconductor called HT1622.

Function of this product has RAM Mapping 64 x16 LCD Controller for I/O C.

Manufacturers : Holtek Semiconductor Inc

Image and pinout :

Some of the text within the PDF file :

HT1622 RAM Mapping 32´8 LCD Controller for I/O mC Features · · · · · · · · · · Operating voltage: 2.7V~5.2V Built-in RC oscillator 1/4 bias, 1/8 duty, frame frequency is 64Hz Max. 32´8 patterns, 8 commons, 32 segments Built-in internal resistor type bias generator 3-wire serial interface 8 kinds of time base/WDT selection Time base or WDT overflow output Built-in LCD display RAM R/W address auto increment · · · · · · · Two selectable buzzer frequencies (2kHz/4kHz) Power down command reduces power consumption Software configuration feature Data mode and Command mode instructions Three data accessing modes VLCD pin to adjust LCD operating voltage Cascade application General Description HT1622 is a peripheral device specially designed for I/O type mC used to expand the [ ... ]

HT1622 PDF Datasheet Download