Section number Title Page
Chapter 6
Reset and Boot
6.1 Introduction...................................................................................................................................................................169
6.2 Reset..............................................................................................................................................................................170
6.2.1 Power-on reset (POR).................................................................................................................................. 170
6.2.2 System reset sources.................................................................................................................................... 170
6.2.3 MCU Resets................................................................................................................................................. 174
6.2.4 Reset Pin ..................................................................................................................................................... 175
6.2.5 Debug resets.................................................................................................................................................176
6.3 Boot...............................................................................................................................................................................177
6.3.1 Boot sources.................................................................................................................................................177
6.3.2 Boot options................................................................................................................................................. 177
6.3.3 FOPT boot options.......................................................................................................................................178
6.3.4 Boot sequence.............................................................................................................................................. 179
Chapter 7
Power Management
7.1 Introduction...................................................................................................................................................................181
7.2 Clocking modes............................................................................................................................................................ 181
7.2.1 Partial Stop...................................................................................................................................................181
7.2.2 DMA Wakeup..............................................................................................................................................182
7.2.3 Compute Operation......................................................................................................................................183
7.2.4 Peripheral Doze............................................................................................................................................184
7.2.5 Clock Gating................................................................................................................................................ 185
7.3 Power Modes Description.............................................................................................................................................185
7.4 Entering and exiting power modes............................................................................................................................... 187
7.5 Power mode transitions.................................................................................................................................................188
7.6 Power modes shutdown sequencing............................................................................................................................. 189
7.7 Flash Program Restrictions...........................................................................................................................................190
7.8 Module Operation in Low Power Modes......................................................................................................................190
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 7