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Old 04-14-2006, 08:22 AM
Marco
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Default PROG_B and JTAG

Hi,
I'll not use PROG_B with my Spartan3, should I just pull-it up with
10k?
Is it true that I can alway access the FPGA through the JTAG port even
if the M0-M2 are hardware-set for slave/master serial?
Thanks, Marco

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Old 04-14-2006, 08:53 AM
Antti Lukats
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Default Re: PROG_B and JTAG

"Marco" <[email protected]> schrieb im Newsbeitrag
news:[email protected] oups.com...
> Hi,
> I'll not use PROG_B with my Spartan3, should I just pull-it up with
> 10k?
> Is it true that I can alway access the FPGA through the JTAG port even
> if the M0-M2 are hardware-set for slave/master serial?
> Thanks, Marco
>

yes m0,m1,m2 are dont cared for JTAG but PROG_B *must* be high or jtag
config will fail, there I think it supposed to be internal pullup on prog_b
but at least with xilinx virtex I have seen that external pullup is also
required, so better have it in place

antti


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