SAA7118 Datasheet, PDF (118/169 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
15.2.4 SUBADDRESS 03H
Table 41 Analog input control 2 (AICO2); 03H[6:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
D6 HL not reference select
HLNRS
0 normal clamping if decoder is in unlocked state
1 reference select if decoder is in unlocked state
D5 AGC hold during vertical
blanking period
VBSL
0 short vertical blanking (AGC disabled during equalization
and serration pulses); recommended setting
1 long vertical blanking (AGC disabled from start of
pre-equalization pulses until start of active video (line 22 for
60 Hz, line 24 for 50 Hz)
D4 colour peak off
CPOFF
0 colour peak control active (AD signal is attenuated, if
maximum input level is exceeded, avoids clipping effects on
screen)
1 colour peak off
D3 automatic gain control
integration
HOLDG
0 AGC active
1 AGC integration hold (freeze)
D2 gain control fix
GAFIX
0 automatic gain controlled by MODE5 to MODE0
1 gain is user programmable via GAI[17:10] and GAI[27:20]
D1 static gain control channel 2 GAI28
sign bit
see Table 43
D0 static gain control channel 1 GAI18
sign bit
see Table 42
15.2.5 SUBADDRESS 04H
Table 42 Analog input control 3 (AICO3): static gain control channel 1; 03H[0] and 04H[7:0]
DECIMAL
VALUE
0...
...144
145...
...511
GAIN
(dB)
−3
0
0
+6
SIGN BIT
03H[0]
GAI18
0
0
0
1
GAI17
0
1
1
1
GAI16
0
0
0
1
CONTROL BITS D7 TO D0
GAI15
0
0
0
1
GAI14
0
1
1
1
GAI13
0
0
0
1
GAI12
0
0
0
1
GAI11
0
0
0
1
GAI10
0
0
1
1
15.2.6 SUBADDRESS 05H
Table 43 Analog input control 4 (AICO4); static gain control channel 2; 03H[1] and 05H[7:0]
DECIMAL
VALUE
0...
...144
145...
...511
GAIN
(dB)
−3
0
0
+6
SIGN BIT
03H[1]
GAI28
0
0
0
1
GAI27
0
1
1
1
GAI26
0
0
0
1
CONTROL BITS D7 TO D0
GAI25
0
0
0
1
GAI24
0
1
1
1
GAI23
0
0
0
1
GAI22
0
0
0
1
GAI21
0
0
0
1
GAI20
0
0
1
1
2001 May 30
118