SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
For Line Multiplexing Embedded Sync mode only, the Meta Data Header includes a Video Detect (VDET) flag. The device sets this VDET flag whenever NTSC or PAL sync is found. Some other external devices using Line Multiplexing mode may not use VDET. However, when VDET changes, a VDET interrupt is issued (see Table 9-16, Interrupts, for more details on the interrupt). Each Pixel Clock Input Domain (Port A and Port B) has a separate VDET interrupt.
The VDET status register is comprised of 32 bits, each bit representing the value of the VDET flag found in the meta data of the Channel ID. Bit 0 is the VDET value from Channel ID 0, Bit 1is is VDET value from Channel ID 1, and so on. There is a separate status register for each Pixel Input Clock Domain (VIP_PORT_A_VDET_VEC and VIP_PORT_B_VDET_VEC registers).
In Line Mux mode, the meta-data field defining the srcnum is 5-bits wide. Only the last three bits of this field and the upper two bits are reserved. This bit should always be set to 1 in TI Line Mux mode.