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Please let me know how are you driving the address on to the address bus and also how are you saying that the address is getting wrapped for 4KB of data.
Is it possible for you share the project that you developed with us.
After some night work it seems that we know the answer. Looking at table 16 of the datasheet, DQ[31:28] are available at the pins only when 32bit GPIF and both UART and I2S are on. We do not use the I2S.