Datasheet

DTM63391C
1GB, 240-Pin Unbuffered ECC DDR2 DIMM
Document 06612, Revision A, 20-SEP-2010, Dataram Corporation © 2010 Page 10
36 Write Recovery Time (tWR ) (ns) 15 0x3C
37 Internal write to read command delay (tWTR ) (ns) 7.5 0x1E
38 Internal read to precharge command delay (tRTP ) (ns) 7.5 0x1E
39 Memory Analysis Probe Characteristics. UNUSED 0x00
40 Extension of Byte 41(tRC) and Byte 42 (tRFC) (ns) 0x06
Add this value to byte 41 - 0
Add this value to byte 42 - 0.5
41 SDRAM Device Minimum Active to Active/Auto Refresh
Time (tRC) (ns)
60 0x3C
42 SDRAM Device Minimum Auto-Refresh to Active/Auto-
Refresh
Command Period (tRFC). (ns)
127.5 0x7F
43 SDRAM Device Maximum Cycle Time (tCK max). (ns) 8 0x80
44 SDRAM Dev DQS-DQ Skew for DQS & DQ signals (tDQSQ)
(ns)
0.24 0x18
45 DDR SDRAM Device Read Data Hold Skew Factor (tQHS)
(ns)
0.34 0x22
46 PLL Relock Time (us) UNUSED 0x00
47 DRAM maximun Case Temperature Delta. (Degree C). 0x51
DT4R4W Delta (Bits 0:3) - 0.4
Tcasemax delta (Bits 7:4) - 10
48 Thermal Resistance of DRAM Package from Top (Case) to
Ambient ( Psi T-A DRAM ). (C/Watt)
58 0x74
49 DRAM Case Temperature Rise from Ambient due to Activate-Precharge/
Mode Bits (DT0/Mode Bits). (Degree C).
0x57
Bit 0. If "0" DRAM does not support high temperature self-
refresh entry -
1
Bit 1. If "0" Do not need double refresh rate for the proper
operation -
1
DT0, (Bits 2:7) - 6.3
50 DRAM Case Temperature Rise from Ambient due to
Precharge/Quiet Standby (DT2N/DT2Q). (Degree C).
6 0x3C
51 DRAM Case Temperature Rise from Ambient due to
Precharge Power-Down (DT2P). (Degree C).
1.44 0x60
52 DRAM Case Temperature Rise from Ambient due to Active
Standby (DT3N). (Degree C).
6.9 0x2E
53 DRAM Case temperature Rise from Ambient due to Active
Power-Down with Fast PDN Exit (DT3Pfast). (Degree C).
4.4 0x58
54 DRAM Case temperature Rise from Ambient due to Active
Power-Down with Slow PDN Exit (DT3Pslow). (Degree C).
2.2 0x58
55 DRAM Case Temperature Rise from Ambient due to Page Open Burst
Read/DT4R4W Mode Bit (DT4R/DT4R4W Mode Bit). (Degree C).
0x4A
Bit 0. "0" if DT4W is greater than DT4R - 0
DT4R, ( Bits 1:7 ) - 14.8
56 DRAM Case Temperature Rise from Ambient due to Burst
Refresh (DT5B). (Degree C).
24.5 0x31