When developing code to operate a real-time clock (RTC), it is often beneficial to understand how the clock core operating logic has been defined. We all have a fundamental comprehension of how a clock and calendar should operate when properly programmed, but this application note also provides some insight into the expected chip behavior if improper or illegal contents are somehow installed.
A basic real-time clock counter chain found in many of Maxim‘s binary-coded decimal (BCD)-formatted RTCs (such as the DS12885 and DS1302) is illustrated in Figure 1.
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