The TCAN284XEVM provides a solid base to test most use cases without the need for modifying the board; however, there are 2 tests that can require some additional modifications which are Vbat monitoring and sleep current measurements.

As mentioned in the explanation of the WAKEx pins, WAKE1 and WAKE2 can be configured to support Vbat monitoring

Figure 2-4 Vbat Monitoring Using WAKE1 and WAKE2

However, the default setup of the board does not include a properly sized R_WK-VBAT resistor (5.1k) or an RDIV2 resistor by default. However, by removing R67 and adding R14 the R_WK-VBAT resistor is situated correct and by adding R16 the RDIV2 voltage divider can be connected. If during testing, Vbat must never be reversed polarity, D25 can be shorted across; otherwise, D25 must be added as the WAKE1 pin is not capable of handling negative battery voltages.

The other potential modification is due to accurately measuring sleep current. If trying to accurately approximate the sleep current used by the specific SBC IC installed on board there are a few current sources that must be removed for most accurate results for SBC. U3 is used to power the LEDs on the circuit board as well as a few ICs. The EVM does not require U3 to be installed. To minimize current the end user can disable U3 by floating J12, but to completely remove U3s leakage from the system U3 must be removed and J12 must be left floating. Beyond the IC the MOSFETS Q2, Q3, and Q4 are all be removed (acting as LED drivers), but can draw small currents from SBC. In addition to the MOSFETS, R68 and R69 are also be removed. VHSS is left floating for VSUP sleep measurements unless VHSS is used in end application. If VHSS is used in end application remove R2, R3, R4, and R5. Removing these components minimizes non-SBC sleep current. While this can change in actual application, the individual result is more accurate if the above modifications are made.