Philips SAA7102 Datasheet page 51

Philips Semiconductors
Digital video encoder
Table 76 Subaddresses 76H, 77H and 7CH
DATA BYTE
TTXOVS first line of occurrence of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0) in odd field
line = (TTXOVS + 4) for M-systems
line = (TTXOVS + 1) for other systems
TTXOVE last line of occurrence of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0) in odd field
line = (TTXOVE + 3) for M-systems
line = TTXOVE for other systems
Table 77 Subaddresses 78H, 79H and 7CH
DATA BYTE
TTXEVS first line of occurrence of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0) in even field
line = (TTXEVS + 4) for M-systems
line = (TTXEVS + 1) for other systems
TTXEVE last line of occurrence of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0) in even field
line = (TTXEVE + 3) for M-systems
line = TTXEVE for other systems
Table 78 Subaddresses 7AH to 7CH
DATA BYTE
FAL first active line = FAL + 4 for M-systems and FAL + 1 for other systems, measured in lines
FAL = 0 coincides with the first field synchronization pulse
LAL last active line = LAL + 3 for M-systems and LAL for other system, measured in lines
LAL = 0 coincides with the first field synchronization pulse
Table 79 Subaddress 7CH
LOGIC
DATA BYTE
LEVEL
TTX60 0
1
Table 80 Subaddresses 7EH and 7FH
DATA BYTE
LINE individual lines in both fields (PAL counting) can be disabled for insertion of teletext by the respective
bits, disabled line = LINExx (50 Hz field rate)
this bit mask is effective only if the lines are enabled by TTXOVS/TTXOVE and TTXEVS/TTXEVE
2004 Mar 01
DESCRIPTION
DESCRIPTION
enables NABTS (FISE = 1) or European TTX (FISE = 0); default after reset
enables world standard teletext 60 Hz (FISE = 1)
DESCRIPTION
DESCRIPTION
DESCRIPTION
51
Product specification
SAA7102; SAA7103
REMARKS
TTXOVS = 05H; is default after
reset if strapped to PAL
TTXOVS = 06H; is default after
reset if strapped to NTSC
TTXOVE = 16H; is default after
reset if strapped to PAL
TTXOVE = 10H; is default after
reset if strapped to NTSC
REMARKS
TTXEVS = 04H; is default after
reset if strapped to PAL
TTXEVS = 05H; is default after
reset if strapped to NTSC
TTXEVE = 16H; is default after
reset if strapped to PAL
TTXEVE = 10H; is default after
reset if strapped to NTSC