SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The DPLL_HDMI must be configured before any transfer on the HDMI link. The HDMI module is fully operational only when the DPLL_HDMI runs and provides the TMDS clock.
The DPLL_HDMI configuration signals operate according to Table 11-12, which indicates the operation when the DPLL is not locked.
DPLL_HDMI Operation Mode | Idle Bypass |
---|---|
Mode Description | Selects when DPLL_HDMI Bypass Clocks Are Used |
PLLCTRL_HDMI_CONFIGURATION2[0] PLL_IDLE | 1 |
When locked, the DPLL_HDMI output frequency is:
CLKINP is the input frequency in MHz. The divider and multiplier values in the above formulas can be set through the following registers:
When the PLL_REGM bit field is set to 1, the DPLL enters a MN-Bypass mode. This is a low-power mode, where the DPLL gates its internal clocks and powers down the analog blocks. The CLKDCOLDO and CLKOUTLDO clock outputs go low and remain like that until the DPLL exits MN-Bypass mode (by changing the PLL_REGM bit-field to a value other than 0 or 1).
The DPLL_HDMI must be configured before any data transfer to HDMI_PHY.