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2-6 Service Guide
2.2.4 Data Path
E C C
64-bit
SWAP
HD_
OUT
64-bit
SWAP
6 DWORD
5 DWORD
6 DWORD
MUX
PCI_OUT
PCI_IN
P_IN[31:0]
PB_OUT[63:0]
64-bit
HDIN[63:0]
MUX
72-bit
ECC
72-bit
SWAP
8 QWORD
MUX
MUX
MUX
MDIN[63:0]
PCI_IN
MD_IN[63:0]
PB_IN[63:0]
HD_IN
SWAP
H/L DW swap
for 32-bit DRAM
MD_OUT
M1521
MD_IN
ECC partial
W-R path
Figure 2-3 M1521 Data Path