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Intel
®
IXP42X product line and IXC1100 control plane processors—Expansion Bus Controller
Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
DM September 2006
326 Order Number: 252480-006US
8.10 Expansion Bus Controller Performance
Table 127 shows simulated expansion bus throughput.
Note: Maximum sustainable throughput numbers were obtained by simulations. Throughput
may vary depending on what is attached to the expansion bus.
§ §
Table 127. Simulated Expansion Bus Performance
Intel XScale
®
Processor
Command
Expansion Bus
Width (bits)
Expansion Bus
Frequency
(MHz)
Maximum
Sustainable
Throughput
(MBytes/s)
ldrb 8 33 2.01
ldrb 8 66 3.21
ldrb 16 33 2.01
ldrb 16 66 3.21
strb 8 33 1.98
strb 8 66 3.29
ldrh 16 33 4.01
ldrh 16 66 6.43
strh 16 33 3.95
strh 16 66 6.59
ldr 8 33 3.81
ldr 8 66 6.85
ldr 16 33 5.96
ldr 16 66 10.11
ldr (cacheable
region)
8335.18
ldr (cacheable
region)
8 66 10.20
ldr (cacheable
region)
16 33 10.12
ldr (cacheable
region)
16 66 19.66