Philips Semiconductors
Preliminary specification
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb filter, VBI-data slicer and high performance scaler
SAA7114H
15.2.4 SUBADDRESS 03H
Table 40 Analog input control 2 (AICO2); 03H[6:0]
BIT
DESCRIPTION
SYMBOL VALUE
FUNCTION
D6 HL not reference select
HLNRS
0
1
0
normal clamping if decoder is in unlocked state
reference select if decoder is in unlocked state
D5 AGC hold during vertical
blanking period
VBSL
short vertical blanking (AGC disabled during equalization
and serration pulses)
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 white peak off
WPOFF
HOLDG
GAFIX
0
1
0
1
0
1
white peak control active
white peak off
D3 automatic gain control
integration
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 42
D2 gain control fix
D1 static gain control channel 2
sign bit
GAI28
GAI18
D0 static gain control channel 1
sign bit
see Table 41
15.2.5 SUBADDRESS 04H
Table 41 Analog input control 3 (AICO3): static gain control channel 1; 03H[0] and 04H[7:0]
SIGN BIT
03H[0]
CONTROL BITS D7 TO D0
DECIMAL
VALUE
GAIN
(dB)
GAI18
GAI17
GAI16
GAI15
GAI14
GAI13
GAI12
GAI11
GAI10
0...
−3
0
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
...144
145...
...511
0
+6
15.2.6 SUBADDRESS 05H
Table 42 Analog input control 4 (AICO4); static gain control channel 2; 03H[1] and 05H[7:0]
SIGN BIT
03H[1]
CONTROL BITS D7 TO D0
DECIMAL
VALUE
GAIN
(dB)
GAI28
GAI27
GAI26
GAI25
GAI24
GAI23
GAI22
GAI21
GAI20
0...
−3
0
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
...144
145...
...511
0
+6
2000 Mar 15
92
NXP [ NXP ]
