DS12CR887 real-time clock chips, and the normal function of rich working voltage is 3.3 V, working voltage range as 2.97 V- a 3.63 V, is used in digital signal processor (DSP) hardware circuit of the ideal clock chip. The specific characteristics of DSl2CR887 are as follows: (1) is used to store the RAM 10 bytes. Automatically generate year, month, day, week, minutes and seconds, such time information, and sometimes, minutes and seconds of alarm functions, while 25 degrees Celsius temperature per month during the time error within ± 1 minute. (2) internal cabin batteries, external power, the internal temperature of 25 degrees Celsius can keep time information for 5 years. (3) for the time of day, 12 hours and 24 hours of two kinds of patterns. In 12 hours system model, AM and PM distinction in the morning and afternoon. (4) time is binary number and BCD two methods. Built-in 128 bytes (5), including 10 bytes RAM is used to store information, RAM four bytes RAM time is us

DS12887.pdf

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