Re: 11801 NVRAM


How about take out the DS1213 and replace it with a pin compatible 256K SRAM(HM52256,CXK58257,D43256)?
It should work if timebase board supply 5V to the SRAM.if it doesn't work then disconnect the VCC pin of SRAM
from IC socket and supply 3v(two 1.5V batteries) to vcc pin of SRAM then try it again(of course the GND of battery must
connected to GND of timebase board).it will make the SRAM work like a battery backed up NVRAM.

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