7604 VSYNC

The ADV7604 can regenerate the sync signal, and using the CP core, adjust the HS, VS and DE signals as required.

The ADV7604 can support non-standard video formats within certain limits i.e. clock limitations etc. There is an autographic note attached to the design support files - I'd recommend you start by using this note and an eval board to determine if the part will do what you need.

Hi,

is autographic mode available also for digital (DVI) input? In 7604 hardware manual, there is written on page 49 that for HDMI or DVI data the HDMI mode is intended. And in paragraph 4.2 there is the recommendation PRIM_MODE[3:0]: 0x06; VID_STD[5:0]: 0x02 for HDMI mode if free run and decimation are not required. To select autographic mode we would need set PRIM_MODE[3:0]: 0x02 and VID_STD[5:0]: 0x07 (?) Is it correct?

Thanks

Vilem

Hi,

Hi,

for DVI input and autographic mode - I suppose, is it still necessary to set HS/VS muxes to select HS/VS from HDMI source? SYNC_CH1/2_HS_SEL[1:0] = 11b and SYNC_CH1/2_VS_SEL[1:0]=11b, is that correct?

Thanks

Vilem

Hi,

Two muxes are used to select HS_1 and HS_2 from the three possible HSync signals. Similarly, two muxes are used to select VS_1 and VS_2 from the three possible VS signals. These muxes are controlled by SYNC_CH1_HS_SEL[1:0], SYNC_CH1_VS_SEL[1:0], SYNC_CH2_HS_SEL[1:0], and SYNC_CH2_VS_SEL[1:0]. The outputs of these four muxes, as well as the internal EMB_SYNC_1 and EMB_SYNC_2 signals from the sync slicers (as described in Section 10.7.2) are passed to a clock registering and deglitch block

a (analog.com)

Thanks,
Dharani S

Hi,

now it seems we have found the configuration that works well  We programmed video standard, as you adviced, to auto-graphics. But primary mode we programmed to PRIM_MODE[3:0]=0b0110 (HDMI-GR). In addition we wrote (CP map, 0x85)=0xB (disable Autodetectmode for Sync_Source for CH1, force CH1 to use seperate HS & VS). Yes, it works, but I´m a little confused, because it doesnn´t fully conform to the 7604 hw documentation.

Thanks

Vilem

Hi,

do you have any comment on the our above comment? I´m afraid we have found a solution by a chance, without background from documentation. Is the above descriebed procedure correct?

Vilem 

Hi,

• COMP mode (PRIM_MODE[3:0] set to 0x01) 
• GR mode (PRIM_MODE[3:0] set to 0x10) 
• HDMI mode (PRIM_MODE[3:0] set to values 0x05 or 0x06)

 GR 
Analog-graphic mode. This mode is intended for RGB input signals with high bandwidth.
This mode is enabled by setting PRIM_MODE[3:0] appropriately.

 HDMI 
HDMI mode. In HDMI mode the ADV7604 can receive and decode HDMI or DVI data 
throughout the DVI/HDMI receiver front end. Video data from the HDMI receiver is routed 
to the DPP and CP blocks while audio data is available on the audio interface. 
This mode is enabled by selecting either the HDMI (Graphics) primary mode or HDMI (Comp) primary 
mode.

For more information, please refer the below documents,

3630.ADV7604_Support_Docs.zip

Thanks,

Varshini K

Hi,

• COMP mode (PRIM_MODE[3:0] set to 0x01) 
• GR mode (PRIM_MODE[3:0] set to 0x10) 
• HDMI mode (PRIM_MODE[3:0] set to values 0x05 or 0x06)

 GR 
Analog-graphic mode. This mode is intended for RGB input signals with high bandwidth.
This mode is enabled by setting PRIM_MODE[3:0] appropriately.

 HDMI 
HDMI mode. In HDMI mode the ADV7604 can receive and decode HDMI or DVI data 
throughout the DVI/HDMI receiver front end. Video data from the HDMI receiver is routed 
to the DPP and CP blocks while audio data is available on the audio interface. 
This mode is enabled by selecting either the HDMI (Graphics) primary mode or HDMI (Comp) primary 
mode.

For more information, please refer the below documents,

3630.ADV7604_Support_Docs.zip

Thanks,

Varshini K