SAA7120H Datasheet, PDF (21/36 Pages) NXP Semiconductors – Digital video encoder

Philips Semiconductors
Digital video encoder
Product specification
SAA7120H; SAA7121H
Table 39 Subaddresses 7EH and 7FH
DATA BYTE
DESCRIPTION
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
In subaddresses 5BH, 5CH, 5DH, 5EH and 62H all IRE values are rounded up.
7.10 Slave transmitter
Table 40 Slave transmitter (slave address 89H or 8DH)
REGISTER
FUNCTION
Status byte
SUBADDRESS
−
D7
VER2
D6
VER1
D5
VER0
DATA BYTE
D4
D3
D2
CCRDO CCRDE FSEQ2
D1
FSEQ1
D0
O_E
Table 41 No subaddress
DATA BYTE
VER
LOGIC LEVEL
−
CCRDO
1
0
CCRDE
1
0
FSEQ
−
O_E
1
0
DESCRIPTION
version identification of the device: it will be changed with all versions of the IC that
have different programming models; current version is 001 binary
closed caption bytes of the odd field have been encoded
the bit is reset after information has been written to the subaddresses
67H and 68H; it is set immediately after the data has been encoded
closed caption bytes of the even field have been encoded
the bit is reset after information has been written to the subaddresses
69H and 6AH; it is set immediately after the data has been encoded
state of the internal field sequence counter, with bit O_E as LSB
(repetition rate: NTSC = 4 fields, PAL = 8 fields)
during even field
during odd field
2002 Oct 11
21