Information
Section Number Title Page
40.6.10 CMT Modulator Data Register Space Low (CMT_CMD4)........................................................................1017
40.6.11 CMT Primary Prescaler Register (CMT_PPS)............................................................................................1017
40.6.12 CMT Direct Memory Access (CMT_DMA)...............................................................................................1018
40.7 Functional Description..................................................................................................................................................1019
40.7.1 Clock Divider...............................................................................................................................................1019
40.7.2 Carrier Generator.........................................................................................................................................1019
40.7.3 Modulator.....................................................................................................................................................1022
40.7.4 Extended Space Operation...........................................................................................................................1026
40.8 CMT Interrupts and DMA............................................................................................................................................1027
Chapter 41
Real Time Clock (RTC)
41.1 Introduction...................................................................................................................................................................1029
41.1.1 Features........................................................................................................................................................1029
41.1.2 Modes of operation......................................................................................................................................1029
41.1.3 RTC signal descriptions...............................................................................................................................1030
41.2 Register definition.........................................................................................................................................................1030
41.2.1 RTC Time Seconds Register (RTC_TSR)...................................................................................................1031
41.2.2 RTC Time Prescaler Register (RTC_TPR)..................................................................................................1032
41.2.3 RTC Time Alarm Register (RTC_TAR).....................................................................................................1032
41.2.4 RTC Time Compensation Register (RTC_TCR).........................................................................................1033
41.2.5 RTC Control Register (RTC_CR)................................................................................................................1034
41.2.6 RTC Status Register (RTC_SR)..................................................................................................................1036
41.2.7 RTC Lock Register (RTC_LR)....................................................................................................................1037
41.2.8 RTC Interrupt Enable Register (RTC_IER).................................................................................................1038
41.2.9 RTC Write Access Register (RTC_WAR)..................................................................................................1039
41.2.10 RTC Read Access Register (RTC_RAR)....................................................................................................1040
41.3 Functional description...................................................................................................................................................1041
41.3.1 Power, clocking and reset............................................................................................................................1041
41.3.2 Time counter................................................................................................................................................1042
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
36 Freescale Semiconductor, Inc.