SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
Figure 9-66 shows VSYNC from Group 1 and HSYNC from Group 2 being used. Set USE_ACTVID_HSYNC_N=’0’ and DISCRETE_BASIC_MODE=’1’.
In the event that the machine is set to DISCRETE_BASIC_MODE=’0’, lockup will not occur as long as there is an HSYNC active transition during the time that VSYNC is active. This scenario is likely. However, if there is not at least one such transition on HSYNC, then the machine experiences a lock up. It cannot distinguish the end of one frame from the start of the next frame.
Figure 9-66 VSYNC and HSYNC