> if SiFive fabbed a catalog part with one or two E20s at a reasonable cost Why would they do that? That's not the business SiFive is in. Arm doesn't do that -

> if SiFive fabbed a catalog part with one or two E20s at a reasonable cost Why would they do that? That's not the business SiFive is in. Arm doesn't do that -- they leave that to people such as the Raspberry Pi Foundation with the RP2040. Perhaps (if you insist on a SiFive core) you could look at something like the BL602? $0.99 here. https://pine64.com/product/pineseed-bl602-wifi-ble5-soc/ https://pine64.com/product/pineseed-bl602-wifi-ble5-soc/ If you're willing to use non-SiFive cores (and why not), the CH32V003 is pretty awesome for $0.10 (8 pin) to $0.14 (20 pin), assuming 2K RAM and 16K flash is enough for your purposes. But I don't know what is "a decent price" for you.