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ADV7619 CP bypass setting

Question asked by aimPoint on Aug 29, 2014
Latest reply on Sep 2, 2014 by aimPoint

Hi all

 

Please tell us about the ADV7619 "CP bypass setting".

Setting of "CP_COMPLETE_BYPASS_IN_HDMI_MODE(98 BF[0]) " has been confusion as below.

 

 

(1) ADV7619_RecSettings_1-5.pdf

at page 12 " 1.4 Settings for 4kx2k and video with dot clock frequencies above 170MHz "

Make sure that CP Complete bypass is switched off. (No-bypass) 98 BF[0] = 0

 

 

(2) ADV7619 Hardware User Guide Rev.C (UG-237)

 

at Rev. C | Page 101 of 204

The ADV7619 can process streams up to 3 Gbps only in the case where the CP core is fully bypassed.

This is the mandatory mode for frequencies above 2.25 Gbps and must be set by setting CP_COMPLETE_BYPASS_IN_HDMI_MODE.

 

at Rev. C | Page 152 of 204

CP CORE BYPASSING

It is possible to bypass CP core completely with using following register.

When OP_FORMAT_SEL is set to 0x94, 0x95, 0x96, 0x54 CP_COMPLETE_BYPASS_IN_HDMI_MODE must be set to 0.

 

CP_COMPLETE_BYPASS_IN_HDMI_MODE, IO, Address 0xBF[0]

 

CP_COMPLETE_BYPASS_IN_HDMI_MODE     Description

     0                                                                  Normal mode

     1                                                                 HDMI data directly fed to output bypassing CP completely,

                                                                         CP_CLK can be powered down

 

Best regards.

aimPoint

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