SAA7127 PHILIPS [NXP Semiconductors], SAA7127 Datasheet - Page 21

• Manufacturer Part Number: SAA7127
• Description: Digital video encoder
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Table 35 Subaddress 6FH
Table 36 Logic levels and function of CCEN
Table 37 Subaddresses 70H to 72H
Table 38 Subaddress 73H
Table 39 Subaddress 74H
1999 May 31
CCEN
TTXEN
SCCLN
RCV2S
RCV2E
TTXHS
TTXHL
TTXHD
DATA BYTE
DATA BYTE
DATA BYTE
DATA BYTE
Digital video encoder
CCEN1
0
0
1
1
DATA BYTE
start of output signal on RCV2 pin
end of output signal on RCV2 pin
start of signal on pin TTXRQ; see Fig.14
length of TTXRQ window; only active at old TTX protocol:
bit TTXO = 1
indicates the delay in clock cycles between rising edge of TTXRQ
output and valid data at pin TTX
values above 1715 (FISE = 1) or [1727 (FISE = 0)] are not allowed; first active pixel at analog
outputs (corresponding input pixel coinciding with RCV2) at RCV2S = 11AH [0FDH]
values above 1715 (FISE = 1) or [1727 (FISE = 0)] are not allowed; last active pixel at analog
outputs (corresponding input pixel coinciding with RCV2) at RCV2E = 694H (687H)
CCEN0
LOGIC
LEVEL
0
1
0
1
0
1
enables individual line 21 encoding; see Table 36
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
DESCRIPTION
DESCRIPTION
21
DESCRIPTION
DESCRIPTION
DESCRIPTION
SAA7126H; SAA7127H
PAL: TTXHS = 42H
NTSC: TTXHS = 54H
TTXHL = 0: TTXRQ = 1398LLC;
TTXHL = 15: TTXRQ = 1413LLC
minimum value: TTXHD = 2
REMARKS
REMARKS
Product specification