[FAQ] RM57L843: EMIF Data transfer rate calculation.

Hi Veerappan,

VEERAPPAN P said:

  How EMIF data transfer rate is calculated?

  Is there any formula for data rate calculation for EMIF?

There won't be any specific formula for this but you can easily calculate data transfer rate from EMIF clock frequency, Number of bits per data transfer and Number of clock cycles per data transfer.

You can use below formula

EMIF data rate = (EMIF clock frequency)*(Number of bits per data transfer/Number of clock cycles per data transfer)

For example,

See below waveform

Assume clock frequency is 100Mhz and 16-bit EMIF is used then the data rate is as below

clock cycles per transfer =2(Setup)+3(Strobe)=2(Hold)=7

EMIF data rate = (100M)*(16/7)=228.5 Mega bits per second.

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Thanks & regards,
Jagadish.