Is my dev board ( pca10040) broken?

RE: Is my dev board ( pca10040) broken?

Sigurd — Tue, 14 Nov 2017 14:22:06 GMT

Try to program the DK with the BLE HRS example(just drag and drop the ble_app_hrs_pca10040_s132.hex file to the J-Link drive, the .hex is located in the folder, SDK_folder\examples\ble_peripheral\ble_app_hrs\hex ). After programming the DK,remove the jumper, and attach the measuring equipment on P22. Reset the board(click on the IF BOOT/RESET button), and then measure the current.

RE: Is my dev board ( pca10040) broken?

bryanhsieh — Tue, 14 Nov 2017 12:55:44 GMT

As soon as I try and measure the current, I create a short between VDD and VDD_NRF, therefore the current read out becomes 0.

RE: Is my dev board ( pca10040) broken?

Sigurd — Tue, 14 Nov 2017 12:51:23 GMT

Why are you not able to measure current consumption for the nRF52832? In order to measure current you connect the measuring equipment on P22, and there will not be any "open circuit"

RE: Is my dev board ( pca10040) broken?

bryanhsieh — Tue, 14 Nov 2017 12:39:47 GMT

Thanks for the prompt response. Is there any way to fix this? As I am unable to measure the current consumption in its current state.

RE: Is my dev board ( pca10040) broken?

Sigurd — Tue, 14 Nov 2017 12:19:08 GMT

Hi,

One explanation to this behavior is that the chip is being powered through the GPIO pins. With the jumper attached, the chip starts up, and when you remove the jumper afterwards, the voltage on the GPIO pins are high enough to keep the chip powered even after you remove the jumper. When you reset the board without the jumper, you don’t have enough power on the GPIO pins to start the chip up.