How to test memory in an HP48 RAM card
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01-27-2021, 09:39 PM
Post: #23
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RE: How to test memory in an HP48 RAM card
(01-27-2021 07:44 PM)mfleming Wrote: How about this M-RAM chip from Renesas? Thanks for the tip! That's a really nice chip! The reason I hadn't considered MRAM is because all the devices I had investigated ( up until now ) either had too high operating currents or had a huge startup current. The one to which you linked has a maximum write current of 30mA, which is quite high on the HP48GX, but, I think it's not a problem. The chip also can run in QSPI XIP 54MHz DDR mode, which is excellent. Also, the write endurance is even higher than the Cypress Semiconductor chip I was considering which was about 1000 trillion cycle -- this MRAM chip is 10 orders of a magnitude more durable with \(10^{16}\) write cycles! After more research, I think I may instead go with the MRAM chip to which you linked instead of F-RAM. Thanks! Jonathan Aeternitas modo est. Longa non est, paene nil. |
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