UG-707
ADV8005 Hardware Reference Manual
2.2.12.4.
TTL Output CSC
which provide TTL output now have a CSC in that path, allowing, for example, theTTL output video to be converted to
RGB. The TTL output CSC has the same structure as the primary input CSC but it is limited to a maximum pixel clock frequency of 162MHz.
For higher pixels rates the HDMI TX should be used. The CSC must be manually configured for each color space conversion. The CSC on the
TTL output channel can be enabled using the
control. The CSC mode on the TTL output channel can be configured using
. The CSC mode is used to define the fixed point position of the CSC coefficients which are located after
in the IO Map for the TTL output channel.
Figure 46 TTL Output Channel CSC
ttl_out_csc_enable
, IO Map,
Address 0x1BB0[7]
This bit is used to enable the ttl output channel CSC.
Function
ttl_out_csc_enable
Description
0 (default)
CSC disable
1
CSC enable
ttl_out_csc_mode[1:0]
, IO Map,
Address 0x1BB0[6:5]
This signal is used to specify the CSC mode for the ttl output channel CSC. The CSC mode sets the fixed point position of the CSC
coefficients, including a4, b4, c4 and offsets.
Function
ttl_out_csc_mode[1:0]
Description
00 (default)
+/- 1.0, -4096 to 4095
01
+/-2.0, -8192 to 8190
10
+/- 4.0, -16384 to 16380
11
+/- 4.0, -16384 to 16380
ttl_out_a1[12:0]
, IO Map,
Address 0x1BB0[4:0]; Address 0x1BB1[7:0]
This signal is used to specify the ttl out channel CSC coefficient A1.
ttl_out_a2[12:0]
, IO Map,
Address 0x1BB2[4:0]; Address 0x1BB3[7:0]
This signal is used to specify the ttl out channel CSC coefficient A2.
ttl_out_a3[12:0]
, IO Map,
Address 0x1BB4[4:0]; Address 0x1BB5[7:0]
This signal is used to specify the ttl out channel CSC coefficient A3.
4x
2x
+
÷
+
+
x
x
x
ttl_out_a1
ttl_out_a2
ttl_out_a3
ttl_out_a4
4096
ttl_out_csc_mode
0
1
2
Out_A
In_A
In_B
In_C
Rev. A | Page 92 of 317