SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
An additional external clock source is supported on GPIO133 (AUXCLKIN). This must be a single-ended 3.3V external clock that can be used as the clock source for MCAN bit clock. Frequency limits and timing requirements can be found in the device data sheet. The external clock must be connected directly to the GPIO133 pin, as shown in Figure 3-7.
Figure 3-7 Auxiliary Clock Input
(AUXCLKIN)