SAA7120H Datasheet, PDF (15/36 Pages) NXP Semiconductors – Digital video encoder

Philips Semiconductors
Digital video encoder
Product specification
SAA7120H; SAA7121H
Table 15 Subaddress 5EH
DATA BYTE
DESCRIPTION
BLNNL
variable blanking level
DECPH
real-time control
CONDITIONS
white-to-sync = 140 IRE;
note 1
BLNNL = 0; note 1
BLNNL = 63 (3FH); note 1
white-to-sync = 143 IRE;
note 2
BLNNL = 0; note 2
BLNNL = 63 (3FH); note 2
logic 0
logic 1
REMARKS
recommended value: BLNNL = 46 (2EH)
output blanking level = 25 IRE
output blanking level = 45 IRE
recommended value: BLNNL = 53 (35H)
output blanking level = 26 IRE
output blanking level = 46 IRE
disable subcarrier phase reset bit from RTCI
enable subcarrier phase reset bit from RTCI
(see Fig.9)
Notes
1. Output black level/IRE = BLNNL × 2/6.29 + 25.4.
2. Output black level/IRE = BLNNL × 2/6.18 + 25.9; default after reset: 35H.
Table 16 Subaddress 5FH
DATA BYTE
DESCRIPTION
BLNVB
variable blanking level during vertical blanking interval is typically identical to value of BLNNL
CCRS
select cross-colour reduction filter in luminance; see Table 17
Table 17 Logic levels and function of CCRS
CCRS1
0
0
1
1
CCRS0
0
1
0
1
DESCRIPTION
no cross-colour reduction; for overall transfer characteristic of luminance see Fig.5
cross-colour reduction #1 active; for overall transfer characteristic see Fig.5
cross-colour reduction #2 active; for overall transfer characteristic see Fig.5
cross-colour reduction #3 active; for overall transfer characteristic see Fig.5
2002 Oct 11
15