VLYNQ Port User's Guide

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Write Performance
Table B-1. Scaling Factors
Burst Size in 32-bit words Data Bytes Overhead Bytes Scaling Factor
1 4 6 40%
4 16 7 69.56%
8 32 7 82.05%
16 64 7 90.14%
Table B-2. Expected Throughput (VLYNQ Interface Running at 76.5 MHZ and 99 MHZ)
Interface Running at 76.5 MHZ Interface Running at 99 MHZ
Burst Size in
Number of VLYNQ Pins 32-bit Words Mbits/sec Mbytes/sec Mbits/sec Mbytes/sec
1 1 24.19 3.02 31.68 3.96
4 42.07 5.26 55.09 6.89
8 49.62 6.20 64.98 8.12
16 54.52 6.81 71.39 8.92
2 1 48.38 6.05 63.36 7.92
4 84.14 10.52 110.18 13.77
8 99.25 12.41 129.97 16.25
16 109.03 13.63 142.78 17.85
3 1 72.58 9.07 95.04 11.88
4 126.21 15.78 165.27 20.66
8 148.87 18.61 194.95 24.37
16 163.55 20.44 214.17 26.77
4 1 96.77 12.10 126.72 15.84
4 168.28 21.03 220.37 27.55
8 198.50 24.81 259.93 32.49
16 218.07 27.26 285.56 35.70
SPRU938B – September 2007 Write/Read Performance 45
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