Connecting CR2032 to nRF6310/PCA10005

[Shane]

Hello,

I want to test my circuit using a CR2032 coin cell. Is there any way to jumper a coin cell into the supply on the nRF6310 and bypass the voltage regulator/RS232/etc? I just need to power the VCC bus on the PCA10005.

It appears that the AAA socket powers more than just the module; otherwise I could just attach my leads to the exposed AAA contacts.

I understand that there will probably not be enough current for programming the nRF51822, but assume that I have programmed the chip first via USB.

Thank you,

Shane

[Hung Bui]

@Shane: If you don't use GPIO pins, you can simply hook the battery + to pin 2 of K1 (VCC_nRF); and use PCA10005 as a stand alone module.

[Shane]

Hung,

I have some I2C devices that I am using that I need in the circuit as well. I have them in a breadboard connected to the P8-P11 jumpers on the nRF6310, so I am really looking for a solution that allows me to interface with my breadboard while running only the PCA10005 module with the battery.

I see a jumper for nRF current measurement (P7) on the nRF6310. Will removing this jumper isolate the VCC_nRF on the PCA10005 module? Then I could plug the battery into one side of P7.

Little hesitant just to try things w/o a schematic, though.

• Shane

[Shane]

Si I have decided to just remap all of my IO to the AIO header (P5) that is on the PCA10005 module. I needed to figure this out anyway.

A new problem that I am having is that current monitoring no longer works. I have the CR2032 connected to pin K1:2 and pins K1:2,3 shorted. Module powers, but signal @ K2:1 (TP1) looks like ground.

Is there something going on with VTG/nRF_VCC nets if teh module is unplugged? Looking at schematic for PCA10004/5 (V2.0.0) and I don't see where nRF_VCC and VTG are linked on the module.

• Shane

[Hung Bui]

@Shane: If you power the board from K1 pin 2, the current monitor (U2) will not be able to measure the current. You would need to power the board from VTG pins (pin 1,2,3,4 on P2 port) if you want to measure the current. Another option is to directly measure the current flow from CR2032 + to pin K1:2 but this will requires you to have an ampere meter (or power analyzer) instead of voltage meter (or oscilloscope).

Please be noted that, the current monitor does consume some current (~10uA), so if you want to measure very accurate low current consumption, you would need to bypass the current monitor and use option B.