
M2Y51H64TU88D0B / M2Y51H64TU88D6B / M2Y1GH64TU8HD0B / M2Y1GH64TU8HD6B
512MB: 64M x 64 / 1GB: 128M x 64
Unbuffered DDR2 SDRAM DIMM Preliminary Edition
REV 0.1 10
© NANYA TECHNOLOGY CORP.
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
Serial Presence Detect – Part 2 of 2 (1GB)
128Mx64 2 RANKs UNBUFFERED DDR2 SDRAM DIMM based on 64Mx8, 4Banks, 8K Refresh, 1.8V DDR2 SDRAMs with SPD
Serial PD Data Entry
(Hexadecimal)
Extension of Byte 41 t
RC
and Byte 42 t
RFC
00: The number below a decimal point
of tRC and tRFC are 0, tRFC is less
than 256ns. 30: The number below a
decimal point of tRC is 5, tRFC is less
than 256ns
Minimum Core Cycle Time (t
RC
)
Min. Auto Refresh Command Cycle Time (t
RFC
)
Maximum Clock Cycle Time (t
CK
)
Max. DQS-DQ Skew Factor (t
DQS
)
Read Data Hold Skew Factor (t
QHS
)
Thermal Resistance of DRAM Package from Top (Case) to
Ambient (Psi T-A DRAM)
DRAM Case Temperature Rise from Ambient due to
Activate-Precharge/Mode Bits (DT0/Mode Bits)
DRAM Case Temperature Rise from Ambient due to
Precharge/Quiet Standby (DT2N/DT2Q)
DRAM Case Temperature Rise from Ambient due to
precharge Power-Down (DT2P)
DRAM Case Temperature Rise from Ambient due to Active
Standby (DT3N)
DRAM Case Temperature Rise from Ambient due to Active
Power-Down with Fast PDN Exit (DT3P fast)
DRAM Case Temperature Rise from Ambient due to Active
Power-Down with Slow PDN Exit (DT3P slow)
DRAM Case Temperature Rise from Ambient due to Page
Open Burst Read/DT4R4W Mode Bit (DT4R/DT4R4W
Mode Bit)
DRAM Case Temperature Rise from Ambient due to Burst
Refresh (DT5B)
DRAM Case Temperature Rise from Ambient due to Bank
Interleave Reads with Auto-Precharge (DT7)
Thermal Resistance of PLL Package from Top (Case) to
Ambient (Psi T-A PLL)
Thermal Resistance of Register Package from Top (Case)
to Ambient (Psi T-A Register)
PLL Case Temperature Rise from Ambient due to PLL
Active (DT PLL Active)
Resister Case Temperature Rise from Ambient due to
Register Active/Mode Bit (DT Register Active/Mode Bit)
Manufacture’s JEDEC ID Code
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