2004 Mar 01
43
Philips Semiconductors
Product specification
Digital video encoder
SAA7102; SAA7103
Table 43 Subaddress 1BH
Table 44 Subaddresses 26H and 27H
Table 45 Subaddress 28H
Table 46 Subaddress 29H
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
MSM
0
monitor sense mode off; RCOMP, GCOMP and BCOMP bits are not valid; default after reset
1
monitor sense mode on
RCOMP
(read only)
0
check comparator at DAC on pin RED_CR_C is active, output is loaded
1
check comparator at DAC on pin RED_CR_C is inactive, output is not loaded
GCOMP
(read only)
0
check comparator at DAC on pin GREEN_VBS_CVBS is active, output is loaded
1
check comparator at DAC on pin GREEN_VBS_CVBS is inactive, output is not loaded
BCOMP
(read only)
0
check comparator at DAC on pin BLUE_CB_CVBS is active, output is loaded
1
check comparator at DAC on pin BLUE_CB_CVBS is inactive, output is not loaded
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
WSS
−
wide screen signalling bits
3 to 0 = aspect ratio
7 to 4 = enhanced services
10 to 8 = subtitles
13 to 11 = reserved
WSSON
0
wide screen signalling output is disabled; default after reset
1
wide screen signalling output is enabled
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
REMARKS
BS
−
starting point of burst in clock cycles
PAL: BS = 33 (21H); default after reset if
strapping pin 13 tied to HIGH
NTSC: BS = 25 (19H); default after reset if
strapping pin 13 tied to LOW
DATA BYTE
LOGIC
LEVEL
DESCRIPTION
REMARKS
SRES
0
pin TTX_SRES accepts a teletext bit
stream (TTX)
default after reset
1
pin TTX_SRES accepts a sync reset input
(SRES)
a HIGH impulse resets synchronization of the
encoder (first field, first line)
BE
−
ending point of burst in clock cycles
PAL: BE = 29 (1DH); default after reset if
strapping pin FSVGC tied to HIGH
NTSC: BE = 29 (1DH); default after reset if
strapping pin FSVGC tied to LOW