This part is a kind of semiconductor called MTG-12864A.
Function of this product has LCD.
Manufacturers : Microchip Technology
Image and pinout :
Some of the text within the PDF file :
MTG-12864A GENERAL SPECIFICATION Item Number of Character Module Size Viewing Area Dot Size/Dot Pitch Backlight Options Built-in Controller 128x64 93.0(W)x70.0(H)x9.7/14.5(D)mm Max 71.7(W)x39.0(H)mm 0.50(W)x0.50(H)mm/0.52(W)x0.52(H)mm Without/EL/LED Gray STN/Yellow STN/Normal/Extended Temperature/Bottom/Top Viewing KS0108 or compatible INTERFACE PIN ASSIGNMENT Content Pin No. Pin Out 1 2 3 4 V SS V DD V ADJ D/I GND Function Description Logic supply voltage P o w e r s u p p l y f o r L C D p a n e l , t u n i n g f o r m V DD- V EE Data/Instruciton D/I=high: Indicates that data of DB0~DB7 is display data. Read/Write R/W=high: Data of DB0~DB7 can be read by CPU. R/W=low: Data of DB0~DB7 can be written into LCD driver IC at the falling edge of E when CS1 and CS2 is high Enable: When writ [ ... ]