LPCXpresso54628 Development Board SDRAM addressing

[samv]

I am using the documentation for the LPCXpress54628 development board as a guide to replicate the interface with the SDRAM IC IS42S16800F-6BLI in my own design.  I noticed on the diagram that there is a P1_24-EMC_A12 identified connected to pin G1.  However, the datasheet for that device shows pin G1 as NC.  I will assume it really isn't a functioning connection.  The 12 address lines A0-A11 do provide the 4K of addressing for the memory.  Was there a part change?  The other part number (W9812G6JB) also shows NC on G1.

Thanks

Sam

[Harry_Zhang · Accepted solution]

Hi @samv 

Yes, The W9812G6JB and IS42S16800F-6BLI both have only 12 bit address lines.

They are 128Mb SDRAM.

You can also check the LPC54628 RM.

BR

Harry