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The IA3080 utilized a MM58167N clock chip to retain time and date information for the system. It had a trimmer cap to allow the time to be accurate to within a few seconds a month. There was a large battery for power backup on board. Unfortunately the board required 32 consecutive assress ports on the bus. A much better solution was the ability to locally select the clock ports for example see the SD Systems IO/RTC board.
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This page was last modified on 10/25/2013