What's with the P2 Digikey listing - it is totally wrong!
Peter Jakacki
Posts: 10,193
I hear the P2 is on Digikey.
Really!? Ok, so I take a look. From the description it sounds like some P2 Bizarro, not the P2 we know.
Why? Well this one is only Dual-core and has 16kB RAM. Go figure.
Guess that's why you need a datasheet! (Hang on, I at least did an unofficial short back in 2018)
BTW, Mouser was only just a tiny bit better but still out there with DIgikey. Maximum clock freq 25MHz etc.
Really!? Ok, so I take a look. From the description it sounds like some P2 Bizarro, not the P2 we know.
Why? Well this one is only Dual-core and has 16kB RAM. Go figure.
Guess that's why you need a datasheet! (Hang on, I at least did an unofficial short back in 2018)
BTW, Mouser was only just a tiny bit better but still out there with DIgikey. Maximum clock freq 25MHz etc.
Comments
Did you flag Ken? Sometimes the forum moves fast and his reading time is limited
Radiospares uk don't show them yet. https://uk.rs-online.com/web/
They have the P1 but not the P2.
Dave
Com'on Ken. I could write this part of the datasheet licketysplit while Chip gruels over the abs max etc.
Remember I did the original pinout art that looked like a chip as well as a chip block diagram etc for the unofficial datasheet.
Yeah, I saw that too. We know how to read that but does anybody else ?
Parallax should at least supply the vendors with the basic, but correct information and verify if what the vendor posts on their site matches with what they were supplied with.
Yes, a data sheet is needed badly, with actual specs engineers can design to.
The 300+MHz could go into a data sheet, but only in an 'overclock' column.
The guaranteed min needs to be what is defined. (whatever OnSemi actually test them to ) Was that 180MHz (PVT), or a bit below that ?
Not necessarily. Most discrete 16 bit wide RAM chips are byte addressable (or rather, have byte enables, which is how Hub RAM works internally, too). The 32 bit bandwidth is probably the more interesting aspect.
"8 x 16K x 32" is probably the best way to describe P2 hub RAM. That'd also have the advantage of standing out in the parametric search tools