Datasheet

ADV7174/ADV7179
Rev. B | Page 50 of 52
APPENDIX 8—RECOMMENDED REGISTER VALUES
The ADV7174/ADV7179 registers can be set depending on the
user standard required. The power-on reset values can be found
in Figure 37.
The following examples give the various register formats for
several video standards. In each case, the output is set to compos-
ite output with all DACs powered up and with the input control
disabled. Additionally, the burst and
BLANK
color information
is enabled on the output, and the internal color bar generator is
switched off. In the examples shown, the timing mode is set to
Mode 0 in slave format. TR02–TR00 of the Timing Register 0
control the timing modes. For a detailed explanation of each bit
in the command registers, refer to the
section. TR07 should be toggled after setting up a new timing
mode. Timing Register 1 provides additional control over the
position and duration of the timing signals. In the examples,
this register is programmed in default mode.
Register Programming
Table 24. PAL B/D/G/H/I (F
SC
= 4.43361875 MHz)
Address Description Data
00H Mode Register 0 05H
01H Mode Register 1 10H
02H Mode Register 2 00H
03H Mode Register 3 00H
04H Mode Register 4 00H
07H Timing Register 0 00H
08H Timing Register 1 00H
09H Subcarrier Frequency Register 0 CBH
0AH Subcarrier Frequency Register 1 8AH
0BH Subcarrier Frequency Register 2 09H
0CH Subcarrier Frequency Register 3 2AH
0DH Subcarrier Phase Register 00H
0EH Closed Captioning Ext Register 0 00H
0FH Closed Captioning Ext Register 1 00H
10H Closed Captioning Register 0 00H
11H Closed Captioning Register 1 00H
12H Pedestal Control Register 0 00H
13H Pedestal Control Register 1 00H
14H Pedestal Control Register 2 00H
15H Pedestal Control Register 3 00H
16H CGMS_WSS Register 0 00H
17H CGMS_WSS Register 1 00H
18H CGMS_WSS Register 2 00H
19H Telext Request Control Register 00H
0FH Closed Captioning Ext Register 1 00H
10H Closed Captioning Register 0 00H
11H Closed Captioning Register 1 00H
12H Pedestal Control Register 0 00H
13H Pedestal Control Register 1 00H
14H Pedestal Control Register 2 00H
15H Pedestal Control Register 3 00H
16H CGMS_WSS Register 0 00H
17H CGMS_WSS Register 1 00H
18H CGMS_WSS Register 2 00H
19H Teletext Request Control Register 00H
Table 25. PAL N (F
SC
= 4.43361875 MHz)
Address Description Data
00H Mode Register 0 05H
01H Mode Register 1 10H
02H Mode Register 2 00H
03H Mode Register 3 00H
04H Mode Register 4 00H
07H Timing Register 0 00H
08H Timing Register 1 00H
09H Subcarrier Frequency Register 0 CBH
0AH Subcarrier Frequency Register 1 8AH
0BH Subcarrier Frequency Register 2 09H
0CH Subcarrier Frequency Register 3 2AH
0DH Subcarrier Phase Register 00H
0EH Closed Captioning Ext Register 0 00H
0FH Closed Captioning Ext Register 1 00H
10H Closed Captioning Register 0 00H
11H Closed Captioning Register 1 00H
12H Pedestal Control Register 0 00H
13H Pedestal Control Register 1 00H
14H Pedestal Control Register 2 00H
15H Pedestal Control Register 3 00H
16H CGMS_WSS Register 0 00H
17H CGMS_WSS Register 1 00H
18H CGMS_WSS Register 2 00H
19H Teletext Request Control Register 00H