Raspberry Pi announced a new spin of the 2350 that fixes errattum 9. They also announced a drop in compatable with 2MB flash onboard, called the 2354. Yea!
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I wonder how successful the stacked chips will be. I guess it’s an added level of security and reduces board space a bit. Flash is so cheap though, I’d rather have the max if space isn’t a huge issue.
Very excited for the REV4 silicon though.
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Ian, what is your rough estimation for an ETA of BP with the new REV4 and the E9 fix removed? Probably I will postpone my order of BP6 until then.
@mar0ni As you can see, Agustín Gimenez Bernad (gusmanb) managed to get a PICO2 with an RP2350 that has the E9 bug (and it’s not even a custom-designed board 
— so no 100% impedance control + 100% symmetrical tracks) running at over 100 MHz (and beyond), and it works just fine.
Keep in mind that the Bus Pirate has buffers as a front-end, and you’ll be using cables, planks etc., so there’s really no need to worry about the RP2350’s limitations from the bug, pull-downs, or any of that.
In the specific case of the Bus Pirate v6, it doesn’t matter for general use.
Think about it — to do anything properly above 100 MHz, you already need to take signal integrity seriously… not use random unshielded Dupont wires . So yeah, I don’t see any problem with buying it now.
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I believe the full delay table for the RP2350 still isn’t public or complete — look at the one for the RP2040, for example… so there’s really no drama in buying a Bus Pirate v6 with the older RP2350, IMO.
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Thanks for the heads up and clarification 
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I was being a bit flippant, I’m sorry. I don’t plan to make any changes when we make a batch with REV4. The fix for E9 is a change in a single resistor value. It doesn’t impact anything so it’s not worth paying for another round of FCC and CE certification over a single resistor.
We just finished the first volume production of Bus Pirate 6. I doubt it has REV4 chips, it was prior to this announcement. Given the import/export environment that batch may last a year or two.
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