Texas Instruments SPRU938B Manuale Utente
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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