11.2. Functional description

The release version used is PL031 RTC 1v0. The base address for the RTC control registers is 0x101E8000. For more information on the controller, see the ARM PrimeCell Timer Module (SP804) Technical Reference Manual.

The PrimeCell RTC can be used to provide a basic alarm function or long time base counter. This is achieved by generating an interrupt signal after counting for a programmed number of cycles of a real-time clock input. Counting in one second intervals is achieved by use of a 1Hz clock input to the PrimeCell RTC. Figure 11.1 shows the block diagram of the PrimeCell RTC.

Figure 11.1. PrimeCell RTC

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