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["Kiselev, Alexander" <ayk AT bnl.gov>]

  Hi Tonko,

  whether it was a right or a wrong approach, but in order to speed up the V0 iteration of our ASIC/FMC/FPGA board set, it was proposed to decouple the design from any possible complications caused by either a streaming readout functionality or potential delays typically caused by negotiations defining things like a unified RDO interface you mentioned. For instance, it is more or less clear that a "final" version of the HRPPD backplane will not be based on two independent FPGA boards as it is now (though will be the same in the V1 iteration early 2024). So be it. We needed a setup with a sufficient functionality being ready for a beam test in late spring 2024, as a main objective, and we are hopefully getting there.

  Now that the V0 iteration is pretty much out for production, perhaps it's a good time to consider things like the RDO interface, and at least clarify what does it mean at this point (when HGCROCs have no streaming capability, and EICROCs do not have high channel count yet). From my perspective, we can discuss this in a context of EICROC1-based setup only, as a V2 iteration of the HRPPD backplane, towards the end of 2024, correct?

  I think we can pick up a Friday 9am EST time slot for a short meeting, either this or next week.

  Cheers,

    Alexander.

---

From: Eic-projdet-pfrich-electronics-l <eic-projdet-pfrich-electronics-l-bounces AT lists.bnl.gov> on behalf of Tonko Ljubicic via Eic-projdet-pfrich-electronics-l <eic-projdet-pfrich-electronics-l AT lists.bnl.gov>
Sent: Tuesday, November 28, 2023 9:29 AM
To: Christophe de La Taille <taille AT in2p3.fr>
Cc: eic-projdet-pfrich-electronics-l AT lists.bnl.gov <eic-projdet-pfrich-electronics-l AT lists.bnl.gov>
Subject: Re: [Eic-projdet-pfrich-electronics-l] Temperature monitoring in V0 & V1

 

Hello,

I'm new to this mailing list so perhaps this was discussed before.

In short: we are designing an RDO Prototype which is expected to be
of value to all frontend groups. We would like to make it as generic as possible
and to do that we added a FMC connector so that we can readout various
frontend ASICs in the manner we all currently use FPGA development kits.

Looking at the already existing ASIC test cards (e.g. EICROC0, H2GCROC, etc)
we noticed a lot of (unsurprising) pin clashes on the FMC connector which made
it practically impossible to use the RDO Prototype with all of them.

What I am after (and I talked to Miklos, for example) is a unified approach
to the FMC pinouts and (if lucky) signal standards. The only really critical
pins are the clocks going _into_ your testboards because they will be fed
directly by very low jitter PLLs from my RDO Prototype so I can't just
"reprogram" them depending on various boards.

What do you think? I can give you a short presentation with the details
if anyone cares.

           -- Tonko


On Tue, Nov 28, 2023 at 1:58 PM Christophe de La Taille via
Eic-projdet-pfrich-electronics-l
<eic-projdet-pfrich-electronics-l AT lists.bnl.gov> wrote:
>
> dear Alexander,
>
> the chips can operate without problems at 50°C or more, we may also use parameters that reduce the power dissipation (no ToT...).
>
> Discussing with Pierrick here, we propose to fisrt assemble 3PCBs : one with 2 chips, one with 4 and one with 8, essentially for the power and digital tests.  The ones with 2 and 4 chips will focus on the noise and the timing performance.
>
> Best :  Christophe
>
>
>
> On 27/11/2023 21:20, Kiselev, Alexander via Eic-projdet-pfrich-electronics-l wrote:
>
>   Hi Gabor,
>
>   There are few remaining questions related to the temperature monitoring in this V0 iteration:
>
>   (1) can we add at least one permanently mounted temperature sensor (on the FPGA board), provisions to attach at least one remote sensor (placed next to one of the ASICs), and some minimal I2C circuitry to handle those by FPGA, in order to get a feeling of how this all will look in V1?
>
>   (2) can you point Daniel to other expected hot spots on the FPGA board (say related to power convertors, ethernet-related circuitry, etc)?
>
>   Also, Christophe, Pierrick: remind us please, what is the safe temperature range we are going to operate the ASICs?
>
>   Cheers,
>     Alexander.
>
>
> --
> --
> Christophe de LA TAILLE
> OMEGA CNRS/IN2P3 Micro-Electronics Design Lab
> Professor of micro-electronics at Ecole Polytechnique
> Ecole Polytechnique  F91128 Palaiseau France
> +33 16933 8998
>
> --
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