User`s manual

High Performance Low Cost Embedded Systems
Press the “-” key, the buzzer’s frequency will decrease, press the “+” key; the frequency will
increase; press the “ESC” key, you will exit the test and return to the main menu.
(2) RTC real time clock
In the main menu, select “2”, enter and you will see the clock is changing which means the CPU’s
RTC works normally (note: the time the clock shows is not the current time, it is initialized by the test
utility)
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