1. Aruba AP 324 and 325 require minimum OS version 188.8.131.52
2. Aruba 650 controller has been upgraded to the latest code in 6.4.4.x train.
Why the AP still doesn't come up on the controller?
AP 320 series minimum requirement is Aruba OS 6.4.4.x. However, series 320 APs are not supported on Aruba 650 controller even if the controller is running the supported code version. All other controller running 184.108.40.206 and above should be able to terminate the series 320 APs.
Please refer the AP 320 series datasheet page#4 attached with this article.