EDS2504APTA-TI 데이터 시트보기 (PDF) - Elpida Memory, Inc

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EDS2504APTA-TI

256M bits SDRAM WTR (Wide Temperature Range)

Elpida Memory, Inc 

EDS2504APTA/08APTA/16APTA-TI

DQM, UDQM and LDQM (input pins)

DQM controls input/output buffers. In 16M × 16 products, UDQM and LDQM control upper byte (DQ8 to DQ15) and

lower byte (DQ0 to DQ7).

Read operation: If DQM is High, the output buffer becomes High-Z. If the DQM is Low, the output buffer becomes

Low-Z. (The latency of DQM during reading is 2 clocks.)

Write operation: If DQM is High, the previous data is held (the new data is not written). If DQM is Low, the data is

written. (The latency of DQM during writing is 0 clock.)

DQ0 toDQ15 (input/output pins)

Data is input to and output from these pins (DQ0 to DQ3; EDS2504AP , DQ0 to DQ7; EDS2508AP, DQ0 to DQ15;

EDS2516AP).

VDD, VSS, VDDQ, VSSQ (Power supply)

VDD and VSS are power supply pins for internal circuits. VDDQ and VSSQ are power supply pins for the output

buffers.

Preliminary Data Sheet E0248E10 (Ver. 1.0)

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