Does anyone know why the DA14683 would not come out of sleep mode?
We have a setup that from a hardware point of view is identical to the development daughter board DA14684 DB AQFN vD. If we run the code on the daughter board powered on its own by a coin cell it goes to sleep and comes out on the 5seconds on 5 seconds off cycle we have set.
Running the same code on our board it works for a few cycles then stops. Totally baffled, help please.
Hi JeffKAllen,
Thank you for posting your questions online.
1, Which SDK version you are using?
2, You can compare with the EVK schematic: https://www.renesas.com/us/en/document/sch/da14683-pro-development-kit-daughter-board-schematic-aqfn?r=1580551
3, Does the customer board powered the same as EVK?
4, You can share your schematic if it's possible.
BR,
JH_Renesas
Hi JH Thank you or quick response,
1. The SDK version is 1.0.14.1081
2. The schematic is at https://www.dropbox.com/scl/fi/rwocxsxcz5hz7d5lmuu6v/Screenshot-2024-06-13-at-09.25.55.png?rlkey=jzv585dkm083ube290m8ogab2&dl=0
As far as i can see this is near enough identical to the EVK schematic
3. The power is provided on VBAT and is from a 3.7V lithium battery
4. The timer being used is the free RTOS timer provided in the SDK that we believe uses timer 1
BR Jeff
Hi Jeff,
Which sleep mode are you using.
Hi JH Extended sleep mode.
We have yesterday done the following :
On your EVK board put on the firmware to put the unit to sleep for 5 seconds wake for 5 seconds and power it from a power supply on VBAT at 3.8V, current consumption when awake is 1mA when asleep is 20uA which is all as it should be.
We then put the same firmware on our board, the current consumption when awake is 2mA and when asleep goes up to 200uA, but it then never wakes up.
We therefore suspect a hardware issue, but we are certain it cannot be a build issue because we have built the same chip onto 3 different boards and get pretty much the same issue on all the boards
I will send you the PCB layouts please could you take a look and tell me if this could be a layout issue, we have tried to follow your layout but there are minor differences.
Thanks
Jeff
I got updates from HW team:
I have checked the schematic, and found nothing relevant for the issue.One item not related to issue has been found, please see last line in this comment. Some questions to the customer:
JH_Renesas said:The one comment about the SCH: the LED D1 can not work as it's connected like in the schematic. The LED1 pin of the DA14683 is an Open-Drain output. So the LED has to be connected to a supply, e.g. +3V3.
We don't use this so not an issue but will note for future Thank you