1997 Jan 06
17
Philips Semiconductors
Preliminary specification
Digital Video Encoder (ConDENC)
SAA7120; SAA7121
Table 19
Subaddress 61
Table 20
Subaddress 62H
Table 21
Subaddress 62H
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
FISE
0
1
0
1
0
864 total pixel clocks per line; default after reset
858 total pixel clocks per line
NTSC encoding (non-alternating V component)
PAL encoding (alternating V component); default after reset
enlarged bandwidth for chrominance encoding (for overall transfer characteristic of
chrominance in baseband representation see Figs 3 and 4)
standard bandwidth for chrominance encoding (for overall transfer characteristic of
chrominance in baseband representation see Figs 3 and 4); default after reset
luminance gain for white
black 100 IRE; default after reset
luminance gain for white
black 92.5 IRE including 7.5 IRE set-up of black
PAL switch phase is nominal; default after reset
PAL switch phase is inverted compared to nominal
DACs for CVBS, Y and C in normal operational mode; default after reset
DACs for CVBS, Y and C forced to lowest output voltage
PAL
SCBW
1
YGS
0
1
0
1
0
1
INPI
DOWN
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
RTCE
0
1
no real time control of generated subcarrier frequency
real time control of generated subcarrier frequency through SAA7151B or SAA7111
(timing see Fig.10)
DATA BYTE
DESCRIPTION
CONDITIONS
REMARKS
BSTA
amplitude of colour burst; input
representation in accordance
with “CCIR 601”
white-to-black = 92.5 IRE;
burst = 40 IRE; NTSC encoding
BSTA = 0 to 2.02
×
nominal
white-to-black = 92.5 IRE;
burst = 40 IRE; PAL encoding
BSTA = 0 to 2.82
×
nominal
white-to-black = 100 IRE;
burst = 43 IRE; NTSC encoding
BSTA = 0 to 1.90
×
nominal
white-to-black = 100 IRE;
burst = 43 IRE; PAL encoding
BSTA = 0 to 3.02
×
nominal
recommended value:
BSTA = 63 (3FH)
recommended value:
BSTA = 45 (2DH)
recommended value:
BSTA = 67 (43H)
recommended value:
BSTA = 47 (2FH)