Hello,
When I power our customer-designed nRF52832-based electronics I see the ingoing suply current (at 3.1V) rising in about 3 seconds up to 55 mA (!), then decreasing in the same time down to some mA. We use the Taiyo Yuden module EYSHCNZXZ and have an SPI-based accelerometer and a TWI-based temperature sensor and -serial memory at the board. For the chips at both buses we can switch off the power supply.
When connecting a Segger JTrace Pro the increasing and decreasing input current behaviour is exactly the same. But after erasing and flashing the BLE stack and our application firmware everything runs well; in the active state we see a supply current of around 1.8 mA and in sleep mode we turn at about 160 µA which is already quite good. And I can't see any more this increasing and decreasing input current at power-up. Up to now I can't detect a mising function in the electronics, but I'm afraid that in the high current phase something will be damaged inside the BLE module.
My questions are:
Are in the Reset-Phase not all pins in high-impedance or input-mode?
Is already a Firmware flashed in the delivered nRF52832 (maybe optimized for another electronics) which could be the reason for some collissions at the ports?
Best regards
matthK
