On Aug 17, 2:42 pm, Niv <kev.pars...@mbda.co.uk> wrote:
> It seems we're having trouble doing this. Is it possible to force/
> drive a particular pin to 'Z' via JTAG?
You can use boundary-scan software for this purpose. I would recommend
Scanseer http://www.scanseer.com. Put chip in EXTEST state and force
any pin to any value you want.
Reply by Antti●August 17, 20072007-08-17
On 17 Aug., 13:42, Niv <kev.pars...@mbda.co.uk> wrote:
> Hi all,
> We are trying to programme a FLASH memory linked to a APA1000.
> However, we have a data-blaster that should programme the FLASH
> quickly, providing we can drive the write signal from teh APA to a
> high imedance state via the JTAG port.
>
> It seems we're having trouble doing this. Is it possible to force/
> drive a particular pin to 'Z' via JTAG?
>
> The data-blaster write is driven through a buffer which is enabled
> only when the appropriate APA pin is driven to a '1' rather than '0',
> but the buffer o/p conflicts with the APA write signal unless we can
> tri-state that.
>
> TIA, Niv.
Hi all,
We are trying to programme a FLASH memory linked to a APA1000.
However, we have a data-blaster that should programme the FLASH
quickly, providing we can drive the write signal from teh APA to a
high imedance state via the JTAG port.
It seems we're having trouble doing this. Is it possible to force/
drive a particular pin to 'Z' via JTAG?
The data-blaster write is driven through a buffer which is enabled
only when the appropriate APA pin is driven to a '1' rather than '0',
but the buffer o/p conflicts with the APA write signal unless we can
tri-state that.
TIA, Niv.