We design a custom PCB based on the RAK4630.
In RAK4630 Module Datasheet is described the schematic diagram of the RAK4630 module. However in this post@beegee mentions that the information in the schematic is outdated. Where can I find the up to date schematic diagram for the RAK4630 module?
Also in the provided schematic, the legend is written as “nRF51840 and Module Pinout”. I believe this might be a typo and that it should actually be nRF52840. Could you please verify this?
Still it is not clear to me. RAK4630 integrates L10 or not?
Our intention is to operate nRF52840 in normal mode down to 1V8 (VDD range 1.7 - 3.6V) with DC/DC REG1 enabled for optimal power consumption (nRF52840 Power Supply)
For this mode L10 connecting DCCH to VDD does not be placed
Once VDDH and VDD are shorted, the chip will be in Normal mode (inductor effect on DCCH is something I am not sure - maybe Nordic team can clarify). I do not have internal schematic of the nRF52840 but it seems the switching inside is automatic.
What confused me was the need to remove L10 as indicated on the schematic, especially since L10 is under the metal cover and not accessible. Out of curiosity, is L10 accessible on the Sensor Hub and Air Quality WisBlock sensor?
Based on my discussion our hardware team, we haven’t done extensive evaluation on L10 if it operates on Normal Voltage Mode while mounted. It should work but you need to perform validation on your end.
Alternatively, you can get a version without L10. Please send the request to [email protected]. You can mention that you already talked to me about this.