Pavel Shatov wrote: > > the board may need its own USB connectors because VBUS is missing > > on the header. > > Ouch, you're right. VBUS is not there, Fredrik and I overlooked it > and only exposed 3.3V through the header, sorry.
I noticed it in the schematic and mentioned it to Fredrik but I think it was already too late by then. And as he said, it's not a big disaster, only another connector. :) I'll add a small LDO too then, so that the board can work standalone, and to be sure that nothing happens to the Alpha I'll add dual-supply buffers for the UARTs. Maybe overkill, but I don't want to break any Alphas. Pavel Shatov wrote: > Are there suitable processors, that have at least two USB and two UART > interfaces? I mean, can we design dual-channel transceiver with only one > physical processor? I've only seen two USB in larger processors - around the Alpha STM32 size, maybe one size down. That's a bit heavy for the job. There are small processors with one USB and >=2 UARTs and I was considering one of those, but I thought that it's better to keep data and management two completely separate paths. Question is whether to make a single board or a dual board. Dual means better PCB area utilization, so I tend to do that unless there's a different opinion favoring the single board flexibility. Thanks //Peter _______________________________________________ Tech mailing list Tech@cryptech.is https://lists.cryptech.is/listinfo/tech
