The embedded RP2040 is really interesting. I wonder what the CPU<->MCU latency l... | Hacker News

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Chabsff on July 19, 2024 | parent | context | favorite | on: Radxa X4 low-cost, credit card-sized Intel N100 SB...

The embedded RP2040 is really interesting. I wonder what the CPU<->MCU latency looks like. You can pull off some really neat stuff with very tight timing using that chip.

Also an interesting addition for a platform that is clearly meant to compete against RPI in general.

pkaye on July 19, 2024 [–]

Looks like just an UART connected between the N100 and the RP2040.

rcarmo on July 19, 2024 | | [–]

Yep. The whole point is that the GPIOs are owned by the RP2040 and you use it as a I/O coprocessor.

adrian_b on July 19, 2024 | | [–]

There is also a USB link. It is likely that this can access the debug interface of the MCU, which is needed to reprogram it.

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