I am interfacing a separate board to the E-series module. I am currently using the E-Series eval module. I want to bypass power management completely on the E-series board as I’m already handling that on my other board. I have 3.3V available and 3.5V available, but the 3.3V is low power. My problem is that the E-series wants to do a bunch of battery charging “stuff” and will only allow me to (through software) input a minimum of 3.88V. I’m planning on doing everything fairly low power and am running off 4-AA batteries in series, and want to use those in the range of 6.4V max down to about 3.6V. I have my own switcher, monitoring, etc. for soft shutdown at min voltage, so I don’t want to use the E-series board to do that stuff. The e-series board will be (hopefully) configured to have the cell modem shut down and in low power mode while idling, come out of low power and connect the cell modem, upload some measurements, then go back to low power.
My problem is the documentation is either very general or only gives me limited options for doing things. I can see the PMIC and various other ICs on the E-series module, so I want to do whatever depopulations, cuts/jumps, etc. are necessary to power the module from another board at a voltage level that isn’t supported by the current configuration.