Description: procedures used to test the real-time clock module SD2000 series of functional one : four interrupts functions of the program are as follows : 1. The SD2000 board real-time test of time 2./INT1 hours and minutes to the designated low-level output at the moment. 3./INT2 32768HZ fixed frequency output. 4. testing every minute edge interrupt output (INT MODE3) per minute and fixed interrupt output (INT MODE4) function
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