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2 January, 04:26

Assume that you have a 64-bit microprocessor, with a 48-bit external data bus, driven by a 4.0 GHz input clock. This microprocessor has a bus cycle whose minimum duration equals 100 input clock cycles. What is the maximum data transfer rate that this microprocessor can sustain

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  1. 2 January, 05:12
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    The maximum Data transfer rate is 320 Mb/s

    Explanation:

    The minimum microprocessor bus cycle duration = 100 input clock cycles and Data bus clock = 4.0 GHz = 4 * 10⁹ Hz

    The maximum bus cycle rate = Data bus clock/minimum microprocessor bus cycle duration

    Therefore, The maximum bus cycle rate = 4.0 GHz/100 = 4 * 10⁹ / 100 = 4 * 10⁷ = 40 * 10⁶ = 40 M/s

    8 bits is equal to 1 byte, therefore 64 bit is equal to (64/8 = 8) byte.

    Data transferred per bus cycle = 64-bit = 8 bytes.

    The maximum Data transfer rate per second = bus cycle rate * data transferred per bus cycle = 40 M/s * 8 bytes = 320 Mbytes/s = 320 Mb/s.

    The maximum Data transfer is 320 Mb/s
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