I was looking into these recently. The current batch of the nRF54L15's was recalled, so I wonder when mass availability will happen. It looks like an interesting upgrade to the nRF52 though.<p>The reason why I was looking at it is because I'm trying to hook up a 1kHz sampling ADC while streaming the data over BLE, and I need either a good DMA engine that can trigger on an external pin without a CPU interrupt, or a second core. I went down the dual core route, but I'd love to hear people's experience with DMA on the nRF52's and esp32-h2's and if it's finicky or not, and it's worth investing time into.
So many different cores.<p>Dual M33s, VPR, consisting of PPR (a low power 16 MHz RISC-V RV32E? for external I/O) and FLPR (a RISC-V RV32E running at 320 MHz, for software defined peripherals).<p>I wonder what the max square wave GPIO toggle rate is with FLPR. Can it compete with for example RP2040/2350 PIO?
Author here. I’ve got a few more posts on VPR coming in the next couple of weeks. If you have any requests for deep dives into specific aspects of the architecture, feel free to drop them here!