Figure 18. MPC5746R frequency limits
3 Clock tool example use sase: Configure FlexCAN to XOSC at 40 MHz
protocol clock and PLL0 50 MHz BIU/Module clock
The following sections will present an example application of the MPC574xR Clock Calculator. This application note’s example
will configure the FlexCAN protocol clock to 40 MHz XOSC and the FlexCAN BIU and module clock to 50 MHz PLL. The example
will not only show the correct configurations but also how the tool responds if improper configurations are attempted.
When configuring clocks for a module, start at
Peripheral Domains
. As shown in the figure below, FlexCAN follows two clock
domains,
PBRIDGE_x_CLK
for the bus interface unit and module clock, and
CAN_CLK
for the actual communication, protocol
clock.
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
14 / 28
