Conv MVAU external mem_mode deadlock on KV260 with FINN v0.10.1

[zeysudesenol]

Hi,

I'm deploying a YOLO model on KV260 using FINN v0.10.1 with selective external weights (7 out of 10 MVAU layers set to mem_mode=external via folding config).

The bitfile is generated successfully and the DMA channels (idma0-idma6 for weights, idma7 for input) are visible in ol.ip_dict. However, during inference, the system hangs (deadlock):

• The accelerator waits for weights from DDR
• The weight DMAs wait for the accelerator to start

The same approach works perfectly for a KWS model (FC layers only).

Questions:

1. Is external mem_mode supported for Conv-based MVAU layers in FINN v0.10.1?
2. Is there a specific DMA trigger sequence required for Conv MVAU external weights?
3. Is there a working example of external mem_mode with convolutional models?

Thank you.