SAA7118 Datasheet, PDF (124/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
FUNCTION
BIT
DESCRIPTION
SYMBOL VALUE
50 Hz/625 LINES
60 Hz/525 LINES
14H[2] automatic chrominance AUTO[1:0] 00 disabled
and standard detection control
0EH[1]
01 active, filter settings and sharpness control are preset to
default values according to the detected standard and
mode; recommended setting
10 active, filter settings are preset to default values
according to the detected standard and mode
11 active, but no filter presets
D0
adaptive chrominance
CCOMB
comb filter
0
disabled
1
active
Note
1. The meaning of ‘preferred standard’ is, that the internal search machine will always give priority to the selected
standard, thus the recognition time for these standards is kept short.
15.2.16 SUBADDRESS 0FH
Table 53 Chrominance gain control; 0FH[7:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
D7 automatic chrominance
gain control
ACGC
0
on; recommended setting
1
programmable gain via CGAIN6 to CGAIN0; need to be
set for SECAM standard
D[6:0] chrominance gain value CGAIN[6:0] 000 0000 minimum gain (0.5)
(if ACGC is set to logic 1)
010 0100 nominal gain (1.125)
111 1111 maximum gain (7.5)
2001 May 30
124