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Write Performance
Table B-1. Scaling Factors (continued)
Burst Size in 32-bit words Data Bytes Overhead Bytes Scaling Factor
16 64 7 90.14%
Using a VLYNQ interface running at 99 MHz, the performance shown in Table B-2 is ideally expected.
Table B-2. Expected Throughput (VLYNQ Interface Running at 99 MHz)
Number of VLYNQ Pins Burst Size in 32-bit Words Throughput (Mbits/sec) Throughput (Mbytes/sec)
1 1 31.68 3.96
4 55.09 6.89
8 64.98 8.12
16 71.39 8.92
2 1 63.36 7.92
4 110.18 13.77
8 129.97 16.25
16 142.78 17.85
3 1 95.04 11.88
4 165.27 20.66
8 194.95 24.37
16 214.17 26.77
4 1 126.72 15.84
4 220.37 27.55
8 259.93 32.49
16 285.56 35.70
Using a VLYNQ interface running at 76.5 MHz, the performance shown in Table B-3 is ideally expected.
SPRUF89 – October 2007 Write/Read Performance 51
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