Luke (author of Hazard3) provided some context regarding including the Hazard3 cores alongside the M33's:<p>> I can't compare the sizes of the two cores. The final die size would likely have been exactly the same with the Hazard3 removed, as std cell logic is compressible, and there is some rounding on the die dimensions due to constraints on the pad ring design. I <i>can</i> say that we taped out at a very high std cell utilisation and we might have saved a few grey hairs during final layout and STA by deleting the RISC-V cores.<p><a href="https://x.com/wren6991/status/1821582405188350417" rel="nofollow">https://x.com/wren6991/status/1821582405188350417</a>
Compared to RP2040:<p>Larger package (60 or 80 pins)<p>Variant with 2 MB in-package Flash<p>Secure boot and encrypted boot<p>Two security execution contexts<p>Random number generator<p>SHA-256 accelerator<p>8 kB of OTP ROM (separate from the 32 kB BOOTROM)<p>8 channel HSTX high speed serial transmitter<p>30->48 GPIO (18 more, in the 80 pins)<p>8->12 PIO state machines<p>12->16 DMA channels<p>RISC-V and ARM (selectable at boot, individually per core)<p>Cortex-M0+->Cortex-M33 (I don't know what that means in practice)<p>133->150 MHz core clock<p><a href="https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.pdf" rel="nofollow">https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.p...</a>
Wow, this seems to address every complaint about the RP2040 I had. Be sure to read all the way to the bottom for the "One more thing" section. You can choose Cortex-M33 or RISC-V at boot time transparently!
Maybe a good place to ask this: does anyone know of an all-in-one board for battery management in small mobile devices? Recently started playing with the ESP32 and was surprised there isn't a ready-to-go board on AliExpress for handling usb battery charging with simultaneous device powering. I want to add a LiPo to my design and have it just work like my cell phone does.
Yes, it can run DOOM.<p><pre><code> We’ve seen some amazing demonstrations of that power: from our very own Graham Sanderson’s port of DOOM</code></pre>
So we've seen people discuss doing dirty tricks like trapping and emulating writes, among other horrible things, to get external RAM "working" on an RP2040. The RP2350 datasheet says it supports read/write memory mapping on its new QSPI memory interface. So, does that mean one can just straightforwardly hook up PSRAM? I'm not much of a hardware person but this seems very promising. (And also, I'm really curious how much better the performance will be if you can do that.)
How many of us here who frequent these forums are guilty of being irresponsible with digital waste/footprint when it comes to things like this?<p>The amount of different variations of Raspberry Pi's I've been collecting over the years for no good reason, all doing nothing. And I don't even consider myself part of the upper echelon/extremists when it comes to this.<p>With that said, I wonder when we will get Raspberry Pi Pico 2 W (with wireless/Bluetooth capabilites)<p>> The unique dual-core, dual-architecture capability of RP2350 provides a pair of industry-standard Arm Cortex-M33 cores, and a pair of open-hardware Hazard3 RISC-V cores, selectable in software or by programming the on-chip OTP memory.<p>Kind of interesting... Two architectures in one chip? <a href="https://www.raspberrypi.com/products/rp2350/" rel="nofollow">https://www.raspberrypi.com/products/rp2350/</a>
Woah an on-chip switch mode power supply? How does that work? I've put together these before on a PCB and they require an inductor and a bunch of other supporting passive elements. How does all that fit onto a chip?
Lots of nice steady improvements but 8 high speed outputs is a really nice benefit.<p>> <i>The maximum frequency for the HSTX clock is 150 MHz, the same as the system clock. With DDR output operation, this
is a maximum data rate of 300 Mb/s per pin.</i>
I'm a bit surprised by the RISC-V cores. I thought the ARM investment would kill any such aspirations.<p>The investment was made nine months ago. Is a hardware design locked in at this point? We will see what happens in the future and whether we will get more RISC-V cores.
I honestly would've expected WiFi on-chip. There are fewer and fewer use cases without connectivity, and it's so wasteful to have a separate chip for that.
Which Raspberry Pi would one need to run Vim and Firefox? And is it possible to have it use a tablet as a monitor and draw power from it?<p>That would be everything I need to develop web applications. I wonder if I could use a 3-piece setup to do so:<p><pre><code> A keyboard connected to the Pi
The Pi connected to a tablet which acts as a monitor
</code></pre>
Not sure how much the Pi weights, probably less than 100g? The Apple Magic Keyboard for example is 230g. And the Lenovo Tab P12 for example is 570g. So together less than 1kg. For a Linux development machine with external keyboard, that would be quite nice.