SPRSP93 November 2024 F29H850TU , F29H859TU-Q1
ADVANCE INFORMATION
Refer to the PDF data sheet for device specific package drawings
The I/O BOR monitor also supervises the VDDIO rail. During power up, this is the second monitor to release (that is, second to untrip) on VDDIO. This monitor has a tighter tolerance compared to the I/O POR.
Any drop in voltage below the recommended operating voltages will trip the I/O BOR and reset the device but this can be disabled by setting VMONCTL.bit.BORLVMONDIS to 1. The I/O BOR can only be disabled after the device has fully booted up. If the I/O BOR is disabled, the I/O POR will reset the device for voltage drops.
Figure 6-2 shows the operating region of the I/O BOR.