Chip Errata(Hardware Bugs)

Speck2e/2f

• Channel index mapping error between the output DYNAP-CNN core/layer and readout layer:

  • channel 0 in DYNAP-CNN core mapped to channel 1 in readout layer.

  • channel 4 in DYNAP-CNN core mapped to channel 2 in readout layer.

  • channel 8 in DYNAP-CNN core mapped to channel 3 in readout layer.

  • …

So if you wanted to use the readout layer of the devkit, please make sure your last convolutional layers’ weights is correctly mapped. In sinabs-dynapcnn we provide a utility function:

sinabs.backend.dynapcnn.utils.extend_readout_layer

to help you re-mapping the last convolutional layer’s weights, for more details see “How to Use Readout Layer”