Information

Section number Title Page
41.3 Functional description...................................................................................................................................................1023
41.3.1 Power, clocking, and reset...........................................................................................................................1023
41.3.2 Time counter................................................................................................................................................1025
41.3.3 Compensation...............................................................................................................................................1025
41.3.4 Time alarm...................................................................................................................................................1026
41.3.5 Update mode................................................................................................................................................1026
41.3.6 Register lock................................................................................................................................................1027
41.3.7 Access control..............................................................................................................................................1027
41.3.8 Interrupt........................................................................................................................................................1027
Chapter 42
Universal Serial Bus OTG Controller (USBOTG)
42.1 Introduction...................................................................................................................................................................1029
42.1.1 USB..............................................................................................................................................................1029
42.1.2 USB On-The-Go..........................................................................................................................................1030
42.1.3 USB-FS Features..........................................................................................................................................1031
42.2 External Signal Description..........................................................................................................................................1031
42.3 Functional description...................................................................................................................................................1032
42.3.1 Data Structures.............................................................................................................................................1032
42.4 Programmers interface..................................................................................................................................................1032
42.4.1 Buffer Descriptor Table...............................................................................................................................1032
42.4.2 RX vs. TX as a USB target device or USB host..........................................................................................1033
42.4.3 Addressing BDT entries...............................................................................................................................1034
42.4.4 Buffer Descriptors (BDs).............................................................................................................................1034
42.4.5 USB transaction...........................................................................................................................................1037
42.5 Memory map/Register definitions................................................................................................................................1039
42.5.1 Peripheral ID register (USBx_PERID)........................................................................................................1041
42.5.2 Peripheral ID Complement register (USBx_IDCOMP)...............................................................................1042
42.5.3 Peripheral Revision register (USBx_REV)..................................................................................................1042
42.5.4 Peripheral Additional Info register (USBx_ADDINFO).............................................................................1043
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
36
Preliminary
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