Figure 21. PBRIDGE_x_CLK to oscillators
3.1.1 Configure the oscillator
Now start going downstream, configuring from the oscillator down to
PBRIDGE_x_CLK
. The external oscillator frequency is
application-dependent and can be any value between 8 MHz and 40 MHz. This tool has a safeguard to prevent invalid values
from being entered. The figure below shows an attempt to enter 7 MHz to the XOSC frequency cell. A dialog box appears notifying
the user that the value is not accepted when he/she tries to click away from the cell.
Figure 22. Invalid frequency input
Set the XOSC frequency back to 40 MHz. Set the value of the
XOSC Select
block to 0 to select XTAL, the external oscillator, as
shown in the following figure.
NXP Semiconductors
Clock tool example use sase: Configure FlexCAN to XOSC at 40 MHz protocol clock and PLL0 50 MHz BIU/Module clock
MPC574xR Clock Calculator Guide, Rev. 5, October 2018
Application Note
16 / 28
