Intel IXP2800 Personal Computer User Manual


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354 Hardware Reference Manual
Intel
®
IXP2800 Network Processor
PCI Unit
Table 134. Byte Lane Alignment for 64-Bit PCI Data Out (Big-Endian to 64 Bits PCI Little
Endian with Swap)
SRAM Data
IN[7:0] IN[15:8] IN[23:16] IN[31:24] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
DRAM Data
IN[39:32] IN[47:40] IN[55:48] IN[63:56] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
PCI Side
OUT[63:56] OUT[55:48] OUT[47:40] OUT[39:32] OUT[31:24] OUT[23:16] OUT[15:8] OUT[7:0]
Table 135. Byte Lane Alignment for 64-Bit PCI Data Out (Big-Endian to 64 Bits PCI Big-Endian
without Swap)
SRAM Data
IN[7:0] IN[15:8] IN[23:16] IN[31:24] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
DRAM Data
IN[39:32] IN[47:40] IN[55:48] IN[63:56] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
direct map
pci to dram
IN[7:0] IN[15:8] IN[23:16] IN[31:24] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
PCI Side
OUT[39:32] OUT[47:40] OUT[55:48] OUT[63:56] OUT[7:0] OUT[15:8] OUT[23:16] OUT[31:24]
Table 136. Byte Lane Alignment for 32-Bit PCI Data Out (Big-Endian to 32 Bits PCI Little
Endian with Swap)
SRAM Data
IN[7:0] IN[15:8] IN[23:16] IN[31:24] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
DRAM Data
IN[39:32] IN[47:40] IN[55:48] IN[63:56] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
PCI Data
OUT[31:24] OUT[23:16] OUT[15:8] OUT[7:0] OUT[31:24] OUT[23:16] OUT[15:8] OUT[7:0]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
PCI Add[2]=1 PCI Add[2]=0
Table 137. Byte Lane Alignment for 32-Bit PCI Data Out (Big-Endian to 32 Bits PCI Big-Endian
without Swap)
SRAM Data
IN[7:0] IN[15:8] IN[23:16] IN[31:24] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
DRAM Data
IN[39:32] IN[47:40] IN[55:48] IN[63:56] IN[7:0] IN[15:8] IN[23:16] IN[31:24]
PCI Data
OUT[7:0] OUT[15:8] OUT[23:16] OUT[31:24] OUT[7:0] OUT[15:8] OUT[23:16] OUT[31:24]
Longword1 (32 bits)
LW1 drive after LW0
Longword0 ((32 bits)
LW0 drive first
PCI Add[2]=1 PCI Add[2]=0
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