EEPROM health?

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tcharron
 
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Joined: Tue Oct 13, 2009 7:15 pm

EEPROM health?

Post by tcharron »

I've been looking at the firmware code a bit, and am wondering why the time is stored in the EEPROM so often? The only time that those variables are read is when the device is plugged in or a battery is installed. In both of those cases, the stored time will not be accurate enough to mitigate setting the time.

By repeatedly writing to the EEPROM, won't those cells get trashed eventually? Also, while on battery, doesn't this just draw unnecessary juice?

adafruit
 
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Re: EEPROM health?

Post by adafruit »

it only writes once an hour...so its not that much power. we did the math, it would last a decade or longer (and thats the bare minimum)

Agent24
 
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Joined: Sun Jan 24, 2010 6:48 am

Re: EEPROM health?

Post by Agent24 »

So why does it write every hour?

If I disabled that function from running, would anything bad happen?

adafruit
 
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Re: EEPROM health?

Post by adafruit »

if power is temporarily lost it will not blink 12:00

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