Specification
NET2270 USB Interface Controller
______________________________________________________________________________
NetChip Technology, Inc., 2003
335 Pioneer Way, Mountain View, California 94041
TEL (650) 526-1490
FAX (650) 526-1494
http://www.netchip.com
Rev 3.6, April 17, 2003
24
4.5.5 I/O Performance
4.5.5.1 Non-Multiplexed Read Transaction
•
Read Access Time: 35 nsec
•
I/O Recovery Time: 33 nsec
•
For an 8-bit bus, the maximum performance is:
1/68 nsec = 14 Mbytes/sec
•
For a 16-bit bus, the maximum performance is:
2/68 nsec = 29 Mbytes/sec
4.5.5.2 Multiplexed Read Transaction
•
ALE Width: 5 nsec
•
Address float: 5 nsec (system dependant)
•
Read Access Time: 35 nsec
•
I/O Recovery Time: 33 nsec
•
For an 8-bit bus, the maximum performance is:
1/78 nsec = 13 Mbytes/sec
•
For a 16-bit bus, the maximum performance is:
2/78 nsec = 26 Mbytes/sec
4.5.5.3 Non-Multiplexed Write Transaction
•
Write Width: 5 nsec
•
Write to Write Recovery Time: 55 nsec
•
For an 8-bit bus, the maximum performance is:
1/60 nsec = 16 Mbytes/sec
•
For a 16-bit bus, the maximum performance is:
2/60 nsec = 33 Mbytes/sec
4.5.5.4 Multiplexed Write Transaction
•
ALE Width: 5 nsec
•
Address float: 5 nsec (system dependant)
•
Write Width: 5 nsec
•
Write to Write Recovery Time: 55 nsec
•
For an 8-bit bus, the maximum performance is:
1/70 nsec = 14 Mbytes/sec
•
For a 16-bit bus, the maximum performance is:
2/70 nsec = 28 Mbytes/sec
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