PLCC-80 socket usage
refaQtor
Posts: 146
recent discussion of PLCC-80 socket sized "industrial" P2 has me wondering about the ease of insertion, and I expect one would have a better experience extracting with a unique tool?
I wonder about the potential to place an additional socket on a board to insert what would amount to a co-processor that a customer may buy/insert as an upgrade later. I was ready to use the P2 Edge sockets and the extra RAM option of the P2-EC32MB is actually useful to me for these purposes.
A fool's errand, perhaps... but, I've explored implementing Datalog (Prolog) as an inference engine on top of a slim SQL by parallelizing and pipelining some of the processes across many cogs. RAM is admittedly tight, and will take a bit of cache cleverness for both speed and space. a preliminary look at the speed is remarkably favorable when coding the application directly for the hardware and skipping the gobs of processing power and energy eaten up by operating systems that increasing consider the hardware all their own to waste as they please.
I've had some fun with Eric's Lisp in the sample folder of FlexProp. Lisp, too, may get a fresh implementation distributed across more cogs such that i'll fit well as a co-processor for old-school symbolic logic manipulation sorts of AI agents.
anyway, I guess I'll still implement using P2 Edges, and adjust accordingly if the situation changes. Just wondered who might have a feeling for the PLCC-80 socket as a means of expansion options.
Comments
PLCC-84 I presume you meant ... I found the P2-Stamp module to be very effective both fitted in the socket and as a removable part. A regular extractor tool grips the module better than a real PLCC chip package. It half expected there to be problems but it was no issue at all.
The only down side is it has very little heat sinking. Don't expect to overwork the Prop2, at least not to the extreme that Ada has been on the forums, when sitting in a PLCC socket like that.
Chip is suggesting that board (Michael is calling it P2 Industrial) be put into the socket upside-down, so that the copper used for heat-sinking if fully exposed and gets better air flow than if it were on the inside of the socket.
right. thanks.
and I don't intend to push beyond 300MHz
The original knivd P2STAMP I have runs very well, actually (with the on-board HyperRAM). Gets very hot, but no crash. Main problem with that one is actually noisy VIO rails. Maybe official PLCC board without the extras will have the Eval/Edge style power delivery, that would be good.
Yeah, P2STAMP, probably not the best for analog, compared to other P2 boards that have many LDO regulators and not one big switching regulator...
But, in my control application, all needed is digital I/O. There are some things though that put out 0..10 VDC analog and would be good to be able to capture that in a good way.