Figure C-3 Memory System Functional Block Diagram - Sun Microsystems Ultra 60 Service Manual

UPA_DATA0<143..000>
UPA_DATA1<143..000>
UPA_DATA3<71..00>
FIGURE C-3
As shown in
always accessed four at a time. Consequently, the DIMMs must be installed in
groups of four (quad) and individual DIMMs within a bank must be of equal
capacity.
Caution – Failure to populate a DIMM bank with DIMMs of equal capacity will
result in inefficient use of memory resource or system failure.
Note – For best system performance, install four identical DIMMs.
C-10 Sun Ultra 60 Service Manual • August 2001
MEM_A_SEL
MEM_B_SEL
MEM_A_RD
MEM_B_RD
MEM_A_WR
MEM_B_WR
UPA_DATA2<63..00>
Memory System Functional Block Diagram
, the memory module is arranged in four banks. DIMMs are
FIGURE C-4
illustrates DIMM row mapping.
FIGURE C-5
MEM_ADDR
MEM_RASA2_L
MEM_RASA0_L
Marvin
MEM_CASR2_L
ASIC
MEM_CASR0_L
MEM_WRR2_L
Memory
MEM_WRR0_L
interface
K9+
ASIC
MEM_DAT<575..000>
Memory
module