[libre-riscv-dev] Pinout, interfaces, Rudi, and Raptor

Luke Kenneth Casson Leighton lkcl at lkcl.net
Sat May 9 11:02:13 BST 2020

On Sat, May 9, 2020 at 10:12 AM Staf Verhaegen <staf at fibraservi.eu> wrote:

> You refer to a first SBC preferably low-cost. The October prototype tape-out will not be cost-effective for that. It is a multi-project wafer.

i explained this to Yehowshua, however it was off-list during a very
rapid conversation with Tim from Raptor CS  - thank you for putting
this on-list.

> You can order extra wafers but it does mean that the cost of that wafer is divided over much less devices; meaning the cost will be around $32 per chip and some of them will not be functional; in microelectrics you never have 100% yield. Also I think there is limit on only be able to get at most 1000 chips this way.

(in lower geometries on MPW Programmes, 30% yield is good going).


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