Selecting device in VectorUnitCellUpdatePolicy

[KunalRandad]

I want to simulate a cell by 3 devices. So VectorUnitCellUpdatePolicy looked like a good solution. The devices are supposed to have scaling factors of 100, 10 and 1 (say) and then, the scaled output will be summed. However, for each update in backward pass, I want to have control over which device I want to update. I want to update the cell by selecting device as per the gradient (only sign without magnitude also works for me) and the current device state. If possible, I want to have control on how each increment or decrement pulse may be applied to the device. The problem I am facing is that there does not seem to be any way to control device, even when using SINGLE_FIXED. I could not find any variable or function to control the device being updated. SingleFixed method just uses a constant index. I would like to know how can I implement my requirements.

[maljoras-sony]

Hi @KunalRandad,
many thanks for the question. Actually, there is a way to control which device is updated. You can use analog_tile.set_hidden_update_index(idx), see here for the implementation and the documentation