Low power system on mode without VDDH

RE: Low power system on mode without VDDH

Nancy Wang — Tue, 30 May 2023 09:20:48 GMT

Thank you for the reminder, I have re-asked the question by creating a new ticket.

RE: Low power system on mode without VDDH

Hung Bui — Tue, 30 May 2023 09:18:18 GMT

Nancy Wang : Are you adding more information to the question of JD. Or it's your own issue that you post here ?
If it's your own issue, please create a new ticket.

RE: Low power system on mode without VDDH

Nancy Wang — Tue, 30 May 2023 08:34:14 GMT

The system enters Normal Voltage mode when the supply voltage is only connected to the VDD , and VDDH
pin is open. What are the specific effects of this situation? During the burn-in and test, VDDH was not shorted to VDD and the test was found to be normal.

RE: Low power system on mode without VDDH

Hung Bui — Fri, 21 Apr 2023 13:37:45 GMT

Hi JD,

9mA sounds like a lot. I assume you are using nRF5 SDK.

Could you try to test with \examples\peripheral\rtc and check what consumption you have ?
You should see around 10-20 uA depends if the RTC timer timeout quick or slow.

If it's in that range, you can try a BLE application, for example ble_app_blinky . It should be in the range of dozens uA.

Could you send your schematic ? According to our reference design, VDDH should be connected to VDD when you setting it up for Normal supply voltage mode.