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EZ-USB2131 14个BULK端口seventeen 64-byte packets?
看了Cypress文献资料:
The AN2131 transferred seventeen 64-byte packets of bulk data per frame. This translates to 8.704 Mbits/sec if the bulk data were to be transferred on a sustained basis, and if no other USB devices were on the bus. This accounts for a bus utilization percentage of 73% AN2131不是只有14个BULK端口么?seventeen 64-byte packets 是个什么意思。呵呵,基本问题,指导一下。谢谢!! |
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沙发#
发布于:2002-10-28 16:43
请指导下,谢谢!
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板凳#
发布于:2002-10-28 22:24
随便哪个bulk端口,一个frame,17个包,每个包64bytes.
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地板#
发布于:2002-10-29 15:33
是有14个bulk,每frame用了17个64字节的数据!传输速率就是这样算的
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