Rtc Interrupts - Philips LPC2119 User Manual

Philips Semiconductors Preliminary User Manual
ARM-based Microcontroller LPC2119/2129/2292/2294

RTC INTERRUPTS

Interrupt generation is controlled through the Interrupt Location Register (ILR), Counter Increment Interrupt Register (CIIR), the
alarm registers, and the Alarm Mask Register (AMR). Interrupts are generated only by the transition into the interrupt state. The
ILR separately enables CIIR and AMR interrupts. Each bit in CIIR corresponds to one of the time counters. If CIIR is enabled for
a particular counter, then every time the counter is incremented an interrupt is generated. The alarm registers allow the user to
specify a date and time for an interrupt to be generated. The AMR provides a mechanism to mask alarm compares. If all non-
masked alarm registers match the value in their corresponding time counter, then an interrupt is generated.
Real Time Clock 211 January 08, 2004