K60P100M100SF2RM Datasheet, PDF (190/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Module clocks
5.7.7 USB FS OTG Controller clocking
The USB FS OTG controller is a bus master attached to the crossbar switch. As such, its
clock is connected to the system clock.
NOTE
For the USB FS OTG controller to operate, the minimum
system clock frequency is 20 MHz.
The USB OTG controller also requires a 48 MHz clock. The clock source options are
shown below.
MCGPLLCLK or
MCGFLLCLK
USB_CLKIN
SIM_CLKDIV2
[USBFRAC, USBDIV]
USB 48MHz
SIM_SOPT2[USBSRC]
Figure 5-7. USB 48 MHz clock source
5.7.8 FlexCAN clocking
The clock for the FlexCAN's protocol engine can be selected as shown in the following
figure.
OSCERCLK
Bus clock
FlexCAN clock
CANx_CTRL1[CLKSRC]
Figure 5-8. FlexCAN clock generation
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
190
Freescale Semiconductor, Inc.