2004 Mar 16
154
Philips Semiconductors
Product specification
PC-CODEC
SAA7108E; SAA7109E
18.2.2.4
Subaddress 03H
Table 152
Analog input control 2 (AICO2); 03H[6:0]
Note
1.
HLNRS = 1 should not be used in combination with WPOFF = 0.
18.2.2.5
Subaddress 04H
Table 153
Analog input control 3 (AICO3); static gain control channel 1; 03H[0] and 04H[7:0]
18.2.2.6
Subaddress 05H
Table 154
Analog input control 4 (AICO4); static gain control channel 2; 03H[1] and 05H[7:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
6
HL not reference select
HLNRS
0
normal clamping if decoder is in unlocked state
reference select if decoder is in unlocked state
short vertical blanking (AGC disabled during equalization
and serration pulses)
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)
white peak control active
white peak control off
AGC active
AGC integration hold (freeze)
automatic gain controlled by MODE3 to MODE0
gain is user programmable via GAI[17:10] and GAI[27:20]
see Table 154
1
(1)
0
5
AGC hold during vertical
blanking period
VBSL
1
4
white peak control off
WPOFF
0
(1)
1
0
1
0
1
3
automatic gain control
integration
HOLDG
2
gain control fix
GAFIX
1
static gain control channel 2
sign bit
static gain control channel 1
sign bit
GAI28
0
GAI18
see Table 153
DECIMAL
VALUE
GAIN
(dB)
SIGN BIT
03H[0]
CONTROL BITS 7 TO 0
GAI18
GAI17
GAI16
GAI15
GAI14
GAI13
GAI12
GAI11
GAI10
0...
...144
145...
...511
3
0
0
+6
0
0
0
1
0
1
1
1
0
0
0
1
0
0
0
1
0
1
1
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
DECIMAL
VALUE
GAIN
(dB)
SIGN BIT
03H[1]
CONTROL BITS 7 TO 0
GAI28
GAI27
GAI26
GAI25
GAI24
GAI23
GAI22
GAI21
GAI20
0...
...144
145...
...511
3
0
0
+6
0
0
0
1
0
1
1
1
0
0
0
1
0
0
0
1
0
1
1
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1