Datasheet

Rev. 1.4 May 2009
FBDIMM
DDR2 SDRAM
10 of 42
Figure 9. Basic DRAM Write Data Transfers on FBD
Figure 10. Simultaneous RD / WR Data Transfers
ACT1
NOP
NOP
ACT1
12345
FBD southbound
cmd/data
DIMM 1 cmd
DIMM 1 data
DIMM 2 cmd
DIMM 2 data
FBD northbound
data
12345678910111213
WR1
Wdata
Wdata
WR1
NOP
Wdata
Wdata
NOP
Wdata
Wdata
NOP
Wdata
Wdata
SYNC
1010
0101
Status
Fixed fall through time
ACT1
12345
FBD southbound
cmd/data
DIMM 1 cmd
DIMM 1 data
DIMM 2 cmd
DIMM 2 data
FBD northbound
data
12345678910111213
RD1
Wdata
Wdata
RD1
ACT3
Wdata
Wdata
WR2
NOP
NOP
RD3
NOP
NOP
SYNC
1010
0101
Status
ACT2
Wdata
Wdata
ACT1
Wdata
Wdata
ACT3 RD3
ACT2 WR2