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Old 28th Jun 2011, 11:19 am   #4
ppppenguin
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Location: North London, UK.
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Default Re: Mostek/ST 'Timekeeper' IC (Sun NVRAM) repair

Quote:
Originally Posted by paulsherwin View Post
I have to say it seems a pretty cretinous design decision to use a non-replaceable battery in any piece of equipment, let alone in an (at the time) expensive server. Why didn't Mostek just use a coin cell holder on the part, and given that they didn't why didn't Sun use something else?
Hindsight is a very powerful tool. Unfortunately difficult to apply at the design stage. I've used this sort of device in a design for a client on the basis it was convenient and economical. Since the battery life was longer than the anticipated service life for the product I couldn't see a downside. Even with high end kit, you aren't usually designing for the convenience of the 2nd user.

Kat, that's a nice bit of surgery. Fairly simple compared to some the problems we will face in the future as ever more complex chips are found to have wear-out problems.
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