The following article is intended to give an example on the use of the FS26 in standby mode with the S32K3 MCU also in standby to get lower consumptions on costumer designs and waking up both through an external wake (EXTWAKE) and the PGOOD SBC signal.
Software requirements:
The attached codes uses the following SW requirements:
- S32K3 RTD 4.0.0 HF02
- FS26 SBC RTD 3.0.0
HW Requirements:
There are a few reworks needed on the EVB in order to make the code work.
S32K3X8EVB-Q289 Rev B2:
1.- Remove resistor R2301 and place R2304 instead, this change is because the PTA8 signal has the EXTWAKE option on the user push-button, this allows that when you send a WKPU request from the MCU (with the push-button) what the MCU does when it has PGOOD activated is that it sends an EXTWAKE signal to WAKE1 of the FS26.
3*.- Optional: FS26 DS recommend FCCU lines with certain values of resistors on their lines that are not present by default on the S32K3X8EVB-Q289.
I've attached the example program on a ZIP file, hope it helps.
