Philips SAA7102 Datasheet page 50

Philips Semiconductors
Digital video encoder
Table 70 Subaddress 6FH
DATA LOGIC
BYTE LEVEL
−
CCEN
TTXEN 0
1
−
SCCLN
Table 71 Logic levels and function of CCEN
DATA BYTE
CCEN1 CCEN0
0 0
0 1
1 0
1 1
Table 72 Subaddresses 70H to 72H
DATA BYTE
ADWHS
ADWHE
Table 73 Subaddress 73H
DATA BYTE
TTXHS
Table 74 Subaddress 74H
DATA BYTE
TTXHD
Table 75 Subaddress 75H
DATA BYTE
CSYNCA
2004 Mar 01
enables individual line 21 encoding; see Table 71
disables teletext insertion; default after reset
enables teletext insertion
selects the actual line, where Closed Caption or extended data are encoded;
line = (SCCLN + 4) for M-systems; line = (SCCLN + 1) for other systems
line 21 encoding off; default after reset
enables encoding in field 1 (odd)
enables encoding in field 2 (even)
enables encoding in both fields
active display window horizontal start; defines the start of the active TV display portion after
the border colour
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
active display window horizontal end; defines the end of the active TV display portion before
the border colour
values above 1715 (FISE = 1) or 1727 (FISE = 0) are not allowed
DESCRIPTION
start of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0); see Fig.14
DESCRIPTION
indicates the delay in clock cycles between rising
edge of TTXRQ output signal on
pin TTXRQ_XCLKO2 (CLK2EN = 0) and valid data
at pin TTX_SRES
advanced composite sync against RGB output from 0 XTAL clocks to 31 XTAL clocks
DESCRIPTION
DESCRIPTION
DESCRIPTION
TTXHS = 42H; is default after reset if
strapped to PAL
TTXHS = 54H; is default after reset if
strapped to NTSC
minimum value: TTXHD = 2; is
default after reset
DESCRIPTION
50
Product specification
SAA7102; SAA7103
REMARKS
REMARKS