SAA7108AE Datasheet, PDF (116/208 Pages) NXP Semiconductors – HD-CODEC

NXP Semiconductors
SAA7108AE; SAA7109AE
HD-CODEC
Table 75. Closed caption, teletext enable register, subaddress 6Fh, bit description
Legend: * = default value after reset.
Bit
Symbol Access Value Description
7 and 6 CCEN[1:0] R/W
enables individual line 21 encoding
00* line 21 encoding off
01 enables encoding in field 1 (odd)
10 enables encoding in field 2 (even)
11 enables encoding in both fields
5
TTXEN
R/W
teletext insertion
0* disabled
1
enabled
4 to 0 SCCLN[4:0] R/W -
selects the actual line, where closed caption or extended
data are encoded; line = (SCCLN + 4) for M-systems;
line = (SCCLN + 1) for other systems
Table 76. Active Display Window Horizontal (ADWH) start and end registers,
subaddresses 70h to 72h, bit description
Subaddress Bit Symbol
Access Value Description
70h
7 to 0 ADWHS[7:0] R/W -
active display window horizontal start;
defines the start of the active TV display
portion after the border color^[1]
71h
7 to 0 ADWHE[7:0] R/W -
active display window horizontal end;
defines the end of the active TV display
portion before the border color^[1]
72h
7
-
R/W 0
must be programmed with logic 0 to ensure
compatibility to future enhancements
6 to 4 ADWHE[10:8] R/W -
active display window horizontal end;
defines the end of the active TV display
portion before the border color^[1]
3
-
R/W 0
must be programmed with logic 0 to ensure
compatibility to future enhancements
2 to 0 ADWHS[10:8] R/W -
active display window horizontal start;
defines the start of the active TV display
portion after the border color^[1]
[1] Values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed.
Table 77. TTX request horizontal start register, subaddress 73h, bit description
Legend: * = default value after reset.
Bit
Symbol Access Value Description
7 to 0 TTXHS[7:0] R/W
start of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0); see Figure 66
42h* if strapped to PAL
54h* if strapped to NTSC
SAA7108AE_SAA7109AE_3
Product data sheet
Rev. 03 — 6 February 2007
© NXP B.V. 2007. All rights reserved.
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