HYB18T512800AF QIMONDA [Qimonda AG], HYB18T512800AF Datasheet - Page 13

• Manufacturer Part Number: HYB18T512800AF
• Description: 240-Pin Fully-Buffered DDR2 SDRAM Modules
• Manufacturer: QIMONDA [Qimonda AG]

Interface Topology
The FB-DIMM channel uses a daisy-chain topology to provide
expansion from a single DIMM per channel to up to 8 DIMMs
per channel. The host sends data on the southbound link to
the first DIMM where it is received and redriven to the second
DIMM. On the southbound data path each DIMM receives the
data and again re-drives the data to the next DIMM until the
Rev. 1.2, 2006-11
03292006-GUME-ERC3
Block Diagram of Channel Southbound and Northbound Paths
13
Block Diagram Advanced Memory Buffer Interface
last DIMM receives the data. The last DIMM in the chain
initiates the transmission of data in the direction of the host
(a.k.a. northbound). On the northbound data path each DIMM
receives the data and re-drives the data to the next DIMM
until the host is reached.
HYS72T[64/128/256]4[00/20]HFD–[3S/3.7]–A
Internet Data Sheet
FIGURE 2
FIGURE 3