Information

Section Number Title Page
5.7.11 TSI clocking.................................................................................................................................................178
Chapter 6
Reset and Boot
6.1 Introduction...................................................................................................................................................................181
6.2 Reset..............................................................................................................................................................................181
6.2.1 Power-on reset (POR)..................................................................................................................................182
6.2.2 System resets................................................................................................................................................182
6.2.3 Debug resets.................................................................................................................................................185
6.3 Boot...............................................................................................................................................................................187
6.3.1 Boot sources.................................................................................................................................................187
6.3.2 Boot options.................................................................................................................................................187
6.3.3 FOPT boot options.......................................................................................................................................187
6.3.4 Boot sequence..............................................................................................................................................188
Chapter 7
Power Management
7.1 Introduction...................................................................................................................................................................191
7.2 Power modes.................................................................................................................................................................191
7.3 Entering and exiting power modes...............................................................................................................................193
7.4 Power mode transitions.................................................................................................................................................194
7.5 Power modes shutdown sequencing.............................................................................................................................195
7.6 Module Operation in Low Power Modes......................................................................................................................195
7.7 Clock Gating.................................................................................................................................................................198
Chapter 8
Security
8.1 Introduction...................................................................................................................................................................199
8.2 Flash Security...............................................................................................................................................................199
8.3 Security Interactions with other Modules.....................................................................................................................200
8.3.1 Security interactions with FlexBus..............................................................................................................200
8.3.2 Security Interactions with EzPort................................................................................................................200
8.3.3 Security Interactions with Debug.................................................................................................................200
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
8 Freescale Semiconductor, Inc.