Ensure nPM1300 never enters sleep mode

RE: Ensure nPM1300 never enters sleep mode

R.J. Helder — Thu, 22 Jan 2026 16:37:54 GMT

Thank you very much for your clear answer!

RE: Ensure nPM1300 never enters sleep mode

ketiljo — Thu, 22 Jan 2026 14:17:29 GMT

nPM1300 can supply the nRF5340 from the BUCK output and the nRF9160 from the VSYS output. If you are using the nRF7000 for scanning only, you can use the nPM1300 BUCK for this as well, provided it's set to >2.9 V. With 3.0 V output, you can supply them all from the nPM1300.

If you are going to use QSPI for the flash device, see this https://docs.nordicsemi.com/bundle/errata_nRF5340_Rev1/page/ERR/nRF5340/Rev1/latest/anomaly_340_136.html#anomaly_340_136 and https://docs.nordicsemi.com/bundle/errata_nRF5340_Rev1/page/ERR/nRF5340/Rev1/latest/anomaly_340_133.html

RE: Ensure nPM1300 never enters sleep mode

R.J. Helder — Tue, 20 Jan 2026 15:39:34 GMT

Ok, perfect! Just wanted to make sure the device doesn't accedentally enters shipmode. Thank you for your answer!

But we have another question:

We want to combine the nRF9160, nRF5340 and nRF7000. We also want to use Macronix MX25L12833FZNI-10G-TR flash IC for external memory (mainly used for FOTA updates).

Can you tell us the prefered hierarchy between the chips and the best option to connect the chips. We want FOTA to be downloaded via the nRF9160 to update the 9160 as well as the nRF5340.

RE: Ensure nPM1300 never enters sleep mode

ketiljo — Tue, 20 Jan 2026 14:02:43 GMT

The SHPHLD pin have an internal pullup to VBAT so no need to do anything with this if you're going to use it. The default setting of this pin is to exit shipmode only. To enter shipmode, you have to enable this by writing to the register.