PRELIMINARY DATA SHEET 256MB DDR SDRAM S.
O.
DIMM HB54A2568KN-A75B/B75B/10B (32M words × 64 bits, 2 Banks) Description The HB54A2568KN is Double Data Rate (DDR) SDRAM Module, mounted 256M bits DDR SDRAM (HM5425161BTT) sealed in TSOP package, and 1 piece of serial EEPROM (2k bits EEPROM) for Presence Detect (PD).
The HB54A2568KN is organized as 16M × 64 × 2 bank mounted 8 pieces of 256M bits DDR SDRAM.
Read and write operations are performed at the cross points of the CK and the /CK.
This high-speed data transfer is realized by the 2 bits prefetch-pipelined architecture.
Data strobe (DQS) both for read and write are available for high speed and reliable data bus design.
By setting extended mod...

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