SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Table 11-14 lists the main DPLL_HDMI and PLLCTRL_HDMI recommended values.
Field Name | Value | Description |
---|---|---|
PLLCTRL_HDMI_GO[0] PLL_GO | 1 - 0 | Write 1 when DPLL_HDMI is to be (re)locked with new parameters. This bit is cleared to 0 by hardware when the DPLL_HDMI request completes. |
PLLCTRL_HDMI_CONFIGURATION1[20:9] PLL_REGM | See (1) | DPLL_HDMI feedback clock divider. |
PLLCTRL_HDMI_CONFIGURATION4[17:0] PLL_REGM_F | See (1) | Fractional part of the DPLL_HDMI feedback clock divider. Must be kept at 0, if integer divider only will be used. |
PLLCTRL_HDMI_CONFIGURATION1[8:1] PLL_REGN | See (1) | DPLL_HDMI reference clock divider. |
PLLCTRL_HDMI_CONFIGURATION2[15] BYPASSEN | 0 | When this bit is 0, the CLKOUT clock depends on the DPLL_HDMI configuration (DPLL locked). For small displays, it may be possible to use the functional clock, in which case this bit must be set to 1. When 1, the internal DPLL_HDMI configuration path is bypassed, and CLKINP is sent on the CLKOUT output. |
PLLCTRL_HDMI_CONFIGURATION2[14] PHY_CLKINEN | 1 | Enable DPLL_HDMI clock output to HDMI_PHY. |
PLLCTRL_HDMI_CONFIGURATION2[13] PLL_REFEN | 1 | Enable the DPLL_HDMI reference clock. |
PLLCTRL_HDMI_CONFIGURATION2[10:9] PLL_LOCKSEL | 0x0 | Phase-lock criteria to lock the DPLL_HDMI. |
PLLCTRL_HDMI_CONFIGURATION2[8] PLL_DRIFTGUARDEN | 0 | The RECAL status/interrupt must be used to decide when to perform a DPLL_HDMI uncalibration. No automatic uncalibration is performed. |
PLLCTRL_HDMI_CONFIGURATION2[3:1] PLL_SELFREQDCO | See (1) | Must be programmed based on the DPLL_HDMI lock frequency. |
PLLCTRL_HDMI_CONFIGURATION2[0] PLL_IDLE | 0 | DPLL_HDMI active. |
PLLCTRL_HDMI_CONFIGURATION3[17:10] PLL_SD | See (1) | Sigma-delta divider = ceiling { [PLL_REGM /(PLL_REGN+1)] * CLKINP(MHz) / 250 } |