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EBE20AE4ACWA Datasheet(PDF) 5 Page - Elpida Memory |
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EBE20AE4ACWA Datasheet(HTML) 5 Page - Elpida Memory |
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5 / 27 page  EBE20AE4ACWA Data Sheet E1395E10 (Ver. 1.0) 5 Serial PD Matrix Byte No. Function described Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value Comments 0 Number of bytes utilized by module manufacturer 1 0 0 0 0 0 0 0 80H 128 bytes 1 Total number of bytes in serial PD device 0 0 0 0 1 0 0 0 08H 256 bytes 2 Memory type 0 0 0 0 1 0 0 0 08H DDR2 SDRAM 3 Number of row address 0 0 0 0 1 1 1 0 0EH 14 4 Number of column address 0 0 0 0 1 0 1 1 0BH 11 5 Number of DIMM ranks 0 1 1 0 0 0 0 0 60H 1 6 Module data width 0 1 0 0 1 0 0 0 48H 72 7 Module data width continuation 0 0 0 0 0 0 0 0 00H 0 8 Voltage interface level of this assembly 0 0 0 0 0 1 0 1 05H SSTL 1.8V 9 DDR SDRAM cycle time, CL = 5 -8E 0 0 1 0 0 1 0 1 25H 2.5ns* 1 -6E 0 0 1 1 0 0 0 0 30H 3.0ns* 1 10 SDRAM access from clock (tAC) -8E 0 1 0 0 0 0 0 0 40H 0.4ns* 1 -6E 0 1 0 0 0 1 0 1 45H 0.45ns* 1 11 DIMM configuration type 0 0 0 0 0 1 1 0 06H ECC, Address/ Command Parity 12 Refresh rate/type 1 0 0 0 0 0 1 0 82H 7.8 µs 13 Primary SDRAM width 0 0 0 0 0 1 0 0 04H × 4 14 Error checking SDRAM width 0 0 0 0 0 1 0 0 04H × 4 15 Reserved 0 0 0 0 0 0 0 0 00H 0 16 SDRAM device attributes: Burst length supported 0 0 0 0 1 1 0 0 0CH 4,8 17 SDRAM device attributes: Number of banks on SDRAM device 0 0 0 0 1 0 0 0 08H 8 18 SDRAM device attributes: /CAS latency 0 0 1 1 1 0 0 0 38H 3, 4, 5 19 DIMM Mechanical Characteristics 0 0 0 0 0 0 0 1 01H 4.00mm max. 20 DIMM type information 0 0 0 0 0 0 0 1 01H Registered 21 SDRAM module attributes 0 0 0 0 0 0 0 0 00H Normal 22 SDRAM device attributes: General 0 0 0 0 0 0 1 1 03H Weak Driver 50 Ω ODT Support 23 Minimum clock cycle time at CL = 4 0 0 1 1 1 1 0 1 3DH 3.75ns* 1 24 Maximum data access time (tAC) from clock at CL = 4 0 1 0 1 0 0 0 0 50H 0.5ns* 1 25 Minimum clock cycle time at CL = 3 0 1 0 1 0 0 0 0 50H 5.0ns* 1 26 Maximum data access time (tAC) from clock at CL = 3 0 1 1 0 0 0 0 0 60H 0.6ns* 1 27 Minimum row precharge time (tRP) -8E 0 0 1 1 0 0 1 0 32H 12.5ns -6E 0 0 1 1 1 1 0 0 3CH 15ns 28 Minimum row active to row active delay (tRRD) 0 0 0 1 1 1 1 0 1EH 7.5ns 29 Minimum /RAS to /CAS delay (tRCD) -8E 0 0 1 1 0 0 1 0 32H 12.5ns -6E 0 0 1 1 1 1 0 0 3CH 15ns 30 Minimum active to precharge time (tRAS) 0 0 1 0 1 1 0 1 2DH 45ns |
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