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CDP1879

Part Number	CDP1879
Manufacturer	Intersil Corporation
Description	CMOS Real-Time Clock
Published	Mar 23, 2005
Detailed Description	CDP1879, CDP1879C-1 March 1997 CMOS Real-Time Clock Description The CDP1879 real-time clock supplies time and calendar ...
Datasheet	CDP1879 PDF File

Overview

CDP1879, CDP1879C-1 March 1997 CMOS Real-Time Clock Description The CDP1879 real-time clock supplies time and calendar information from seconds to months in BCD format.
It consists of 5 separately addressable and programmable counters that divide down an oscillator input.
The clock input can have any one of 4 possible frequencies, allowing ﬂexibility in the choice of crystal or external clock sources.
Using an external 32kHz clock source, timekeeping can be performed down to 2.
5V (see Standby (Timekeeping) Voltage Operation).
The device can be memory-mapped for use with any general-purpose microprocessor and has the additional capability of operating in the CDP1800 series input/output mode.
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