For Tang Primer 20K is a core board in a DDR3 sodimm package designed based on GW2A-V18PG256C8IC8I7. Two additional backplanes are prepared, namely the Dock backplane and the Lite backplane. Distributed static random access memory S-SRAM (bits): 41472 Block static random access memory B-SRAM (bits): 828K The number of block static random access memory B-SRAM (pcs): 46 Master: GW2A-LV18PG256C8IC8I7 Logical Units (LUT4): 20736 Register (FF): 15552 Multiplier (18x18 Multiplier): 48 Phase Locked (PLLs): 4 I/O : 8 Memory: 128M DDR3 128Meg x 16 Flash: 32Mbits NOR Flash download refer to related questions at the bottom Debug interface: Jtag + Uart JST SH1.0 8Pins connector SD card slot: one -pull Display interface: 8Pins spi lcd connector Overall package: 204P DDR3 Sodimm Gold Finger Available IOs: 117 Different batches, product appearance and color may be different, does not affect the use Material: PCB colour: black Package Contents: 1 x motherboard (core board+backplane,Do not solder pin headers) 1 x USB C to A cable 1 x module 1 x Terminal cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.