SPRZ450B February 2018 – September 2024 DRA74P , DRA75P , DRA76P , DRA77P
DSS BT.656/BT.1120 Max Horizontal Blanking Is Non Compliant
Medium
When BT.656 or BT.1120 modes are used on DSS outputs (vout1,2,3), the configuration of the horizontal blanking timing is limited to a value of 256 bytes or less due to the HSW bit field being limited to 8b (256 max value). The BT.656 standard requires 280 or 268 bytes to support PAL and NTSC timings respectively. BT.1120 requires 280, 720, 830 depending on format. The DSS cannot support devices requiring such blanking duration due to this limitation.
If larger blanking period needed, use RGB or YUV mode output, not BT.656/1120.
SR 1.0
AM574x: 1.0
DRA75xP, DRA74xP, DRA77xP, DRA76xP: 1.0
TDA2Px: 1.0
AM576x: 1.0