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# SPEC7 Specification gathering
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This wiki page describes different discussion points for the
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specification of the SPEC7.
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## Under discussion
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### FPGA family
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- Xilinx
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- Kintex 7 vs Zynq
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### SFP
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- Double SFP for allowing redundant links?
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- *not possible to fit on PCIe front-panel*
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- [Image of double FMC cage with
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LEDs](http://www.rego.com.tw/_admin/upload/product/rego_15034811417ioq13.jpg)
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- Image of double decker FMC cage with
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LEDs":https://media.rs-online.com/t_large/R7871705-01.jpg
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- Could maybe fit if would make 2-slot card when optional
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heatsink/fan solution that extends it into the neighboring slot.
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Double decker would not work here though.
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<!-- end list -->
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- Vadj
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- programmable IC, or just a few values and selection with
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jumpers?
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### RAM
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- SO-DIMM socket for RAM
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- Or directly assembled RAM IC?
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### FLASH storage
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- MicroSD slot?
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### USB
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- mini USB connector (as on SPEC)
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- *micro USB-OTG (so it can act as host and as slave). But then we
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should rename the card to SPUEC or SUPEC (U for USB). Perhaps this
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is a crazy idea, but it is nice to think that users can plug'n'play
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the SPUEC/SUPEC on their laptop :) (FV)*
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-----
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## Accepted
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### SATA
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- Keep same SATA connectors as on SPEC.
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- Is a connector specifically for internal use (i.e., not
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panel-mounted).
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- Planned to be used on SPEC for daisy-chaining triggers between
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SPECs with FMC-ADCs with modified gateware.
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-----
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## Rejected
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-----
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12 January 2018
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