« on: March 16, 2014, 04:20:51 AM »
2020 is getting closer every moment.
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My point is the transfer rate does not change. It is kind of like ethernet..... packets are sent at the same speed.... it's how many packets per second that gives you the transfer rate. A fast memory card and a slow memory card both transfer data at the same block speed. A faster memory card is ready sooner with the next block and that's what makes it faster.
Yes but the transfer rate and the throughput rates are different. If we assume that they are using block transfers, the transfer rate is 2GB/sec. That rate remains the same no matter what the read or write speed of the card is....
For example, if the read rate of the card is 200MB/sec, the data is transferred in pulses of 2GB/sec... the line is only active 10 percent of the time. Get a 500MB/sec card and the data is still transferred in pulses of 2GB/sec, but the pulses are more frequent and the line is now active for 25 percent of the time.
Is the transfer synchronous (8 bits per byte and no framing) where 16Mbits/sec = 2Mbytes per second?Based on industry practices it appears that they are quoting raw throughput.
Is it asynchronous (8bits per byte plus 2 framing) where 16Mbits/sec = 1.6Mbytes per second?
Is it asynchronous block (256bytes of 8 bits per byte plus 8 bits framing) where 16Mbits/sec = 1.9998Mbytes per second?