Deep Color Mode Support; Figure 54: Monitoring Tmds Clock Frequency - Analog Devices ADV7850 Hardware Manual

Function
freqtolerance[3:0]
0100 
xxxx

7.18 DEEP COLOR MODE SUPPORT

The ADV7850 supports HDMI streams with 24 bits per sample and deep color modes of 30 or 36 bits per sample. The addition of a video
FIFO (refer to Section 7.19) allows for the robust support of these modes.
The deep color mode information that the ADV7850 extracts from the general control packet can be read back from
deep_color_mode[1:0]. It is possible to override the deep color mode that the ADV7850 unpacks from the video data encapsulated in the
processed HDMI stream. This is achieved by configuring the override_deep_color_mode and deep_color_mode_user[1:0] controls.
deep_color_mode[1:0], Addr 68 (HDMI), Address 0x0B[7:6] (Read Only)
This readback displays the deep color mode information extracted from the general control packet.
Rev. A May 2012
Description
Default tolerance in MHz for new TMDS frequency detection
Tolerance in MHz for new TMDS frequency detection
S ta r t
1
Enab le T M D S _ C L K_ X _S T in te r rup t fo r
the H D M I po r ts tha t a re u se d
Enab le T M D S _PL L _ L C K _ S T in te r rup t
Enab le N E W _ T M D S_ F R Q _ S T in te r rup t
N O
Is
T M D S_ C L K _X _R A
W se t ?
N O
YE S
Is
T M D S_ PL L _ L C K _ R
A W se t ?
N O T E :
1 . T he T M D S_ C L K _ X _ S T in te r rup ts fo llo w
- T M D S_ C L K _ A _ S T (IO M a p , R eg 0 x6 B b it [3] )
- T M D S_ C L K _ B _ S T (IO M a p , R eg 0 x6 B b it [2 ])
- T M D S_ C L K _ C _ S T ( IO M a p , R eg 0 x6 B b it [1 ])
- T M D S_ C L K _ D _ S T ( IO M a p , R eg 0 x6 B b it [0 ])

Figure 54: Monitoring TMDS Clock Frequency

T M D S frequen cy read ba ck no t va lid o r
stab le
R ead the T M D S F requen cy
YE S
T M D S F R E Q
Is
T M D S_ C L K _ X _ S T
se t ?
N O
Is
T M D S _ PL L _L C K _ S
T se t ?
N O
Is
N E W _ T M D S_ F R Q _
S T se t ?
T M D S fr equen cy r ead ba ck va lid
and stab le
158
C lea r T M D S_ C L K _ X _ S T b y
YE S
se tting T M D S_ C L K _ X _ C L R to 1
C lea r T M D S_ PL L _ L C K _ S T b y
YE S
se tting T M D S _ PL L _ L C K_ S _ C L R to 1
C lea r N E W_ T M D S_ F R Q _S T b y
YE S
se tting N E W _ T M D S_ F R Q _ S T_ C L R to 1
ADV7850