SDRAM Calculation of capacity

Calculate the number of addressable locations (don’t think of bit/byte/word for now)

Number of address lines: 11 (A0-A10)

Number of banks : 2 (BA0-BA1)

Max number of rows = 11 (i.e., no. of address lines)

Max number of columns = 11 (i.e., no. of address lines)

Total locations in a bank = 211 x 211

Total locations in the chip = (No. of banks) x (Total locations in a bank)

= 22 x 211 x 211

= 224

Organization: x4, x8, x16

Look for the min possible organization, i.e. x4

Max capacity of the chip is 224 x4 = 226 bits

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