This part is a kind of semiconductor called EN25Q64.

Function of this product has 64 Megabit Serial Flash Memory.

Manufacturers : Eon Silicon Solution

Image and pinout :

Some of the text within the PDF file :

EN25Q64 EN25Q64 64 Megabit Serial Flash Memory with 4Kbyte Uniform Sector FEATURES • Single power supply operation - Full voltage range: 2.7-3.6 volt • Serial Interface Architecture - SPI Compatible: Mode 0 and Mode 3 • 64 M-bit Serial Flash - 64 M-bit/8192 K-byte/32768 pages - 256 bytes per programmable page • • Standard, Dual or Quad SPI Standard SPI: CLK, CS#, DI, DO, WP# Dual SPI: CLK, CS#, DQ0, DQ1, WP# Quad SPI: CLK, CS#, DQ0, DQ1, DQ2, DQ3 High performance 104MHz clock rate for one data bit 50MHz clock rate for two data bits 50MHz clock rate for four data bits • Software and Hardware Write Protection: - Write Protect all or portion of memory via software - Enable/Disable protection with WP# pin • High performance program/erase speed Page program t [ ... ]

EN25Q64 PDF Datasheet Download