Datasheet

Rev. 1.4 May 2009
FBDIMM
DDR2 SDRAM
2 of 42
1.0 FEATURES .....................................................................................................................................4
2.0 FBDIMM GENERALS .....................................................................................................................5
2.1 FB-DIMM Operation Overview ........................................................................................................5
2.2 FB-DIMM Channel Frequency Scaling .............................................................................................6
2.3 FB-DIMM Clocking Scheme ............................................................................................................7
2.4 FB-DIMM Protocol ........................................................................................................................7
2.5 Southbound Command Delivery .....................................................................................................8
2.6 Basic Timing Diagram ...................................................................................................................9
2.7 Advanced Memory Buffer Block Diagram ......................................................................................11
2.8 Interfaces ..................................................................................................................................12
3.0 FBD HIGH-SPEED DIFFERENTIAL POINT TO POINT LINK (at 1.5 V) INTERFACE ...............12
3.1 DDR2 Channel ............................................................................................................................12
3.2 SMBus Slave Interface ................................................................................................................12
3.3 FBD Channel Latency .................................................................................................................13
3.4 Peak Theoretical Throughput .......................................................................................................13
3.5 Hot-add .....................................................................................................................................13
3.6 Hot remove ................................................................................................................................13
3.7 Hot replace ................................................................................................................................13
4.0 PIN CONFIGUREATION ..............................................................................................................14
5.0 FBDIMM FUNCTIONAL BLOCK DIAGRAM ...............................................................................16
5.1 1GB, 128Mx72 Module - M395T2863QZ4 ........................................................................................16
5.2 2GB, 256Mx72 Module - M395T5663QZ4 ........................................................................................17
5.3 4GB, 512Mx72 Module - M395T5160QZ4 .......................................................................................18
5.4 4GB, 512Mx72 Module - M395T5163QZ4 .......................................................................................19
5.5 8GB, 1Gx72 Module - M395T1G60QJ4 .......................................................................................21
6.0 ELECTRICAL CHARACTERISTICS ............................................................................................23
7.0 CHANNEL INITIALIZATION ........................................................................................................32
Table of Contents