Information
Section Number Title Page
43.1.3 Glossary.......................................................................................................................................................1090
43.2 Introduction...................................................................................................................................................................1090
43.2.1 Block Diagram.............................................................................................................................................1090
43.2.2 Features........................................................................................................................................................1091
43.2.3 Modes of Operation.....................................................................................................................................1091
43.3 Module Signal Description...........................................................................................................................................1092
43.3.1 USB Signal Descriptions.............................................................................................................................1092
43.4 Memory Map/Register Definition.................................................................................................................................1093
43.4.1 Control Register (USBDCD_CONTROL)..................................................................................................1094
43.4.2 Clock Register (USBDCD_CLOCK)..........................................................................................................1095
43.4.3 Status Register (USBDCD_STATUS).........................................................................................................1096
43.4.4 TIMER0 Register (USBDCD_TIMER0).....................................................................................................1098
43.4.5 USBDCD_TIMER1.....................................................................................................................................1099
43.4.6 USBDCD_TIMER2.....................................................................................................................................1099
43.5 Functional Description..................................................................................................................................................1100
43.5.1 The Charger Detection Sequence.................................................................................................................1101
43.5.2 Interrupts and Events...................................................................................................................................1111
43.5.3 Resets...........................................................................................................................................................1112
43.6 Initialization Information..............................................................................................................................................1113
43.7 Application Information................................................................................................................................................1113
43.7.1 External Pullups...........................................................................................................................................1113
43.7.2 Dead or Weak Battery..................................................................................................................................1113
43.7.3 Handling Unplug Events..............................................................................................................................1114
Chapter 44
USB Voltage Regulator
44.1 Introduction...................................................................................................................................................................1115
44.1.1 Overview......................................................................................................................................................1115
44.1.2 Features........................................................................................................................................................1116
44.1.3 Modes of Operation.....................................................................................................................................1117
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc. 39