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Update 'Hardware info'

Triss 2021-07-31 21:32:39 +00:00
parent deafe3904d
commit 45964bb445
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Hardware-info.md

@ -72,4 +72,14 @@ You can get these ISSI SRAM chips here:
* [Digikey](https://www.digikey.com/en/products/detail/issi-integrated-silicon-solution-inc/IS61WV25616EDBLL-10TLI/2799144)
* [Farnell/Newark](https://www.newark.com/integrated-silicon-solution-issi/is61wv25616edbll-10tli/sram-4mbit-10ns-tsop-ii-44/dp/65T1338)
* [Mouser](https://eu.mouser.com/ProductDetail/ISSI/IS61WV25616EDBLL-10TLI?qs=DfG0HhEx1UX%2F12WoHJaVrQ%3D%3D)
* [RS Components](https://americas.rsdelivers.com/product/issi/is61wv25616bll-10tli/issi-sram-is61wv25616bll-10tli-4mbit/8115181)
* [RS Components](https://americas.rsdelivers.com/product/issi/is61wv25616bll-10tli/issi-sram-is61wv25616bll-10tli-4mbit/8115181)
#### NOTE / WARNING
I tried installing 3 extra RAM chips, and, despite the contacts looking fine, the following happened:
* The device LED did not turn on
* USB enumerated properly, ScanaStudio recognised the device
* Starting an acquisition does *not* work, as the Spartan-3 gateware seems to refuse to do anything
This could either be bad power contacts, or something inside the Spartan-3 gateware stopping it from functioning. I suspect it is the latter, because (in my opinion) the contacts of the newly soldered RAM chips looked fine, soldering them off one by one did not fix the issue, and the most suspicious-looking contacts were not power-related.