Information
Section Number Title Page
23.7.9 Watchdog Timer Output Register High (WDOG_TMROUTH).................................................................517
23.7.10 Watchdog Timer Output Register Low (WDOG_TMROUTL)..................................................................517
23.7.11 Watchdog Reset Count Register (WDOG_RSTCNT).................................................................................518
23.7.12 Watchdog Prescaler Register (WDOG_PRESC).........................................................................................518
23.8 Watchdog Operation with 8-bit access.........................................................................................................................518
23.8.1 General Guideline........................................................................................................................................518
23.8.2 Refresh and Unlock operations with 8-bit access........................................................................................519
23.9 Restrictions on Watchdog Operation............................................................................................................................520
Chapter 24
Multipurpose Clock Generator (MCG)
24.1 Introduction...................................................................................................................................................................523
24.1.1 Features........................................................................................................................................................523
24.1.2 Modes of Operation.....................................................................................................................................526
24.2 External Signal Description..........................................................................................................................................527
24.3 Memory Map/Register Definition.................................................................................................................................527
24.3.1 MCG Control 1 Register (MCG_C1)...........................................................................................................528
24.3.2 MCG Control 2 Register (MCG_C2)...........................................................................................................529
24.3.3 MCG Control 3 Register (MCG_C3)...........................................................................................................530
24.3.4 MCG Control 4 Register (MCG_C4)...........................................................................................................531
24.3.5 MCG Control 5 Register (MCG_C5)...........................................................................................................532
24.3.6 MCG Control 6 Register (MCG_C6)...........................................................................................................534
24.3.7 MCG Status Register (MCG_S)..................................................................................................................535
24.3.8 MCG Auto Trim Control Register (MCG_ATC)........................................................................................537
24.3.9 MCG Auto Trim Compare Value High Register (MCG_ATCVH)............................................................537
24.3.10 MCG Auto Trim Compare Value Low Register (MCG_ATCVL)..............................................................538
24.4 Functional Description..................................................................................................................................................538
24.4.1 MCG Mode State Diagram..........................................................................................................................538
24.4.2 Low Power Bit Usage..................................................................................................................................543
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
20 Freescale Semiconductor, Inc.