SAA7108AE Datasheet, PDF (118/208 Pages) NXP Semiconductors – HD-CODEC

NXP Semiconductors
SAA7108AE; SAA7109AE
HD-CODEC
Table 83. TTX even request vertical end register, subaddress 79h, bit description
Legend: * = default value after reset.
Bit Symbol
Access Value Description
7 to 0 TTXEVE[7:0] R/W
with TTXEVE8 (see Table 86) last line of occurrence of
signal TTXRQ on pin TTXRQ_XCLKO2 (CLK2EN = 0) in
even field, line = (TTXEVE + 3) for M-systems and
line = TTXEVE for other systems
16h* if strapped to PAL
10h* if strapped to NTSC
Table 84. First active line register, subaddress 7Ah, bit description
Bit Symbol
Access Value Description
7 to 0 FAL[7:0]
R/W
with FAL8 (see Table 86) first active line = (FAL + 4) for
M-systems and (FAL + 1) for other systems, measured in
lines
00h coincides with the first field synchronization pulse
Table 85. Last active line register, subaddress 7Bh, bit description
Bit Symbol
Access Value Description
7 to 0 LAL[7:0]
R/W
with LAL8 (see Table 86) last active line = (LAL + 3) for
M-systems and LAL for other system, measured in lines
00h coincides with the first field synchronization pulse
Table 86. TTX mode, MSB vertical register, subaddress 7Ch, bit description
Legend: * = default value after reset.
Bit Symbol
Access Value Description
7
TTX60
R/W 0* enables NABTS (FISE = 1) or European TTX (FISE = 0)
1
enables world standard teletext 60 Hz (FISE = 1)
6
LAL8
R/W
see Table 85
5
TTXO
R/W
teletext protocol selected (see Figure 66)
0* new teletext protocol selected; at each rising edge of
TTXRQ a single teletext bit is requested
1
old teletext protocol selected; the encoder provides a
window of TTXRQ going HIGH; the length of the window
depends on the chosen teletext standard
4
FAL8
R/W
see Table 84
3
TTXEVE8 R/W
see Table 83
2
TTXOVE8 R/W
see Table 81
1
TTXEVS8 R/W
see Table 82
0
TTXOVS8 R/W
see Table 80
SAA7108AE_SAA7109AE_3
Product data sheet
Rev. 03 — 6 February 2007
© NXP B.V. 2007. All rights reserved.
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