Information

Section Number Title Page
Chapter 39
Real Time Clock (RTC)
39.1 Introduction...................................................................................................................................................................865
39.1.1 Features........................................................................................................................................................865
39.1.2 Modes of operation......................................................................................................................................865
39.1.3 RTC signal descriptions...............................................................................................................................866
39.2 Register definition.........................................................................................................................................................866
39.2.1 RTC Time Seconds Register (RTC_TSR)...................................................................................................867
39.2.2 RTC Time Prescaler Register (RTC_TPR)..................................................................................................868
39.2.3 RTC Time Alarm Register (RTC_TAR).....................................................................................................868
39.2.4 RTC Time Compensation Register (RTC_TCR).........................................................................................869
39.2.5 RTC Control Register (RTC_CR)................................................................................................................870
39.2.6 RTC Status Register (RTC_SR)..................................................................................................................871
39.2.7 RTC Lock Register (RTC_LR)....................................................................................................................872
39.2.8 RTC Interrupt Enable Register (RTC_IER).................................................................................................874
39.2.9 RTC Write Access Register (RTC_WAR)..................................................................................................875
39.2.10 RTC Read Access Register (RTC_RAR)....................................................................................................876
39.3 Functional description...................................................................................................................................................877
39.3.1 Power, clocking and reset............................................................................................................................877
39.3.2 Time counter................................................................................................................................................879
39.3.3 Compensation...............................................................................................................................................879
39.3.4 Time alarm...................................................................................................................................................880
39.3.5 Update mode................................................................................................................................................880
39.3.6 Register lock................................................................................................................................................880
39.3.7 Access control..............................................................................................................................................881
39.3.8 Interrupt........................................................................................................................................................881
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
32 Freescale Semiconductor, Inc.