This part is a kind of semiconductor called ADSP-BF704.

Function of this product has Blackfin+ Core Embedded Processor.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

Blackfin+ Core Embedded Processor ADSP-BF700/701/702/703/704/705/706/707 FEATURES Blackfin+ core with up to 400 MHz performance Dual 16-bit or single 32-bit MAC support per cycle 16-bit complex MAC and many other instruction set enhancements Instruction set compatible with previous Blackfin products Low-cost packaging 88-Lead LFCSP_VQ (QFN) package (12 mm × 12 mm),  RoHS compliant 184-Ball CSP_BGA package (12 mm × 12 mm × 0.8 mm pitch), RoHS compliant Low system power with < 100 mW core domain power at 400 MHz (< 0.25 mW/MHz) at 25°C TJUNCTION PERIPHERALS FEATURES See Figure 1, Processor Block Diagram and Table 1, Processor Comparison MEMORY 136 kB L1 SRAM with multi-parity-bit protection  (64 kB instruction, 64 kB data, 8 kB scratchpad) Large on-chip L2 SRAM with ECC protecti [ ... ]

ADSP-BF704 PDF Datasheet Download