SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Table 11-76 lists the minimum ratio between the pixel clock frequency (DSS_DISPC_LCDn_PCLK) and the functional clock (F_CLK) in the input pixel format when using the scaler unit. DSS_DISPC_LCDn_PCLK and F_CLK are asynchronous. For each LCD output, a dedicated LCD clock is programmable with the LCD and PCD divisor values in DISPC_DIVISORo[23:16][7:0].
The F_CLK is derived from DSS_FCLK through the LCD divisor.
The downscaling ratio is not an integer, it is the ratio F_CLK / DSS_DISPC_LCDn_PCLK, meaning if the ratio is 2.7, then the downscaling ratio is 2.7 and not 2.
F_CLK/DSS_DISPC_LCDn_PCLK Minimum Ratio | Horizontal Resampling | ||||
---|---|---|---|---|---|
Off | Up | 1:1–1:2 | 1:2–1:3 | 1:3–1:4 | |
2 or 1(1) | 2 or 1(1)) | 2 | 3 | 4 |