Why flash a flash need 1 hour ...

Boki =E5=AF=AB=E9=81=93=EF=BC=9A

It is a 4 Mbit, low voltage, Serial Flash memory, with 50MHz SPI bus interface.

Are you complaining that the manufacturer's specified method takes an hour or an existing programmer takes a long time ?

Graham

Pooh Bear =E5=AF=AB=E9=81=93=EF=BC=9A

r or an

An existing programmer takes a long time. :)

Not resonable, unless the mcu is too slow.

or an

I suspect the programming algorithm in the programmer may not be optimal. I've seen different programmers take different times to program the same device.

Graham

Pooh Bear =E5=AF=AB=E9=81=93=EF=BC=9A

hour or an

I've seen

Thanks for information, in fact, I am using a low speed mcu to program, not PC directly..

Best regards, Boki.

A suggestion: look at the programming waveforms with a scope. Compare what you see- clock speeds, data setup and hold times etc.- with what the datasheet says is the maximum rate for the device. That will at least give you an idea where you can improve your algorithms.

Paul Burke

Paul Burke =E5=AF=AB=E9=81=93=EF=BC=9A

Thanks! :)