EW31244SL7QV Datasheet, PDF (56/252 Pages) Intel Corporation – Intel® 31244 PCI-X to Serial ATA Controller

Intel^® 31244 PCI-X to Serial ATA Controller
Functional Blocks
Figure 20. DMA Descriptor Table
31
0
DMA Upper Descriptor Table Pointer
DMA Descriptor Table Pointer
Descriptors in Memory
Byte 3 Byte 2 Byte 1 Byte 0
DMA Data Address
0
EOT
Reserved Byte Count 0
DMA Data Address
0
EOT
Reserved Byte Count 0
DMA Data Address
0
31
0 EOT
Upper DMA Data Address
Reserved Byte Count 0
Common to all Descriptors
DMA Controller
Registers
1st
Data
Buffer
2nd
Data
Buffer
3rd
Data
Buffer
End of Transfer bit set
(Last Transfer Detected)
EOT
DMA Data Address
0
Reserved Byte Count 0
Nth
Data
Buffer
56
April 2004
Developer’s Manual