2004 Mar 01
50
Philips Semiconductors
Product specification
Digital video encoder
SAA7102; SAA7103
Table 70 Subaddress 6FH
Table 71 Logic levels and function of CCEN
Table 72 Subaddresses 70H to 72H
Table 73 Subaddress 73H
Table 74 Subaddress 74H
Table 75 Subaddress 75H
DATA
BYTE
LOGIC
LEVEL
DESCRIPTION
CCEN
−
enables individual line 21 encoding; see Table 71
TTXEN
0
disables teletext insertion; default after reset
1
enables teletext insertion
SCCLN
−
selects the actual line, where Closed Caption or extended data are encoded;
line = (SCCLN + 4) for M-systems; line = (SCCLN + 1) for other systems
DATA BYTE
DESCRIPTION
CCEN1
CCEN0
0
0
line 21 encoding off; default after reset
0
1
enables encoding in field 1 (odd)
1
0
enables encoding in field 2 (even)
1
1
enables encoding in both fields
DATA BYTE
DESCRIPTION
ADWHS
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
ADWHE
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
DATA BYTE
DESCRIPTION
REMARKS
TTXHS
start of signal TTXRQ on pin TTXRQ_XCLKO2
(CLK2EN = 0); see Fig.14
TTXHS = 42H; is default after reset if
strapped to PAL
TTXHS = 54H; is default after reset if
strapped to NTSC
DATA BYTE
DESCRIPTION
REMARKS
TTXHD
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
minimum value: TTXHD = 2; is
default after reset
DATA BYTE
DESCRIPTION
CSYNCA
advanced composite sync against RGB output from 0 XTAL clocks to 31 XTAL clocks