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That's actually a super common way to handle licensing in hard IP. You don't want to spin different revisions of a chip with and without the IP, that's expensiv
by axoltl 2y ago
That's actually a super common way to handle licensing in hard IP. You don't want to spin different revisions of a chip with and without the IP, that's expensive. So you build in fuses to permanently disable the IP. This happens a lot with hardware video encoder/decoder blocks.
- mschuster91 2y agoOr you do it the other way around in software - remember the Pi 1/2 era where you had to buy separate licenses for MPEG/h264 HW decoders, tied to the Pi's serial number?
- sylware 2y agoThat's why the fuse, with proper sales accounting, is so much important.