[MinnowBoard] Minnowboard MAX with Dediprog em100 pro SPI emulator

[Krause Martin]

Hi Charlie,

Charlie Nakamura wrote
> Krause Martin <Martin.Krause at ...> writes:
> 
> >
> > Hi Simon,
> >
> > I'm using both - the SF100 programmer and the EM100Pro emulator - on
> > the Minnowboard Max with success.
> 
> Could you share the pinout you're using with the EM100Pro and the
> Minnow? I have a Minnowboard but not Max. As such, I can't use the clip,
> because the flash is too low profile on the original minnow. And I want to
> know if I can get away with only connecting the 6 pins that I know for sure, or
> if I need to connect something to pins 7 and 8 to do proper emulation (and if
> so, what?)

The EM100Pro has a 20 pin connector, so I assume you refer to your
SPI flash device with your pin numbers?

I don't know the minnow board, only the minnow max, so here a few
general notes to the EM100Pro:

If you want to use the EM100Pro in parallel to your soldered flash,
the important pin is the HOLD pin. If this pin is driven low on the
soldered flash, it does not drive any pins. So it acts as if not
present. This is important for the emulator to work, because it
then can simulate all signals without interfering with the soldered
flash.

The HOLD pin is usually polled low by the emulator, if you connect 
the emulator HOLD with your soldered flash HOLD. Please note, that 
the HOLD pin of the soldered flash has to be pulled-up through a 
resister to VCC on the minnow board (please look at the schematics).
If it is connected directly to VCC then the emulator could not pull the
pin low and could not disable the flash.

All other pins of the emulator should be connected directly to the
SPI bus (= the pins of the soldered flash, if there is no extra header
available):

GND <-> GND
VCC <-> VCC
MOSI <-> MOSI
MISO <-> MISO
CLK <-> CLK
CS <-> CS

The WP (write protect) pin should not matter.

So if the minnow board has the same SPI flash connector as
the minnow max, you could adapt the emulator to this
connector. The only thing additionally you have to do is, pull
the HOLD pin of the onboard flash to low (GND)

Best Regards,
Martin

> 
> Much appreciated
> 
> Charlie Nakamura
> 
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