SAA7109 PHILIPS [NXP Semiconductors], SAA7109 Datasheet - Page 48

• Manufacturer Part Number: SAA7109
• Description: PC-CODEC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2004 Mar 16
PC-CODEC
X = system variable.
Y = (IAGV
VBLK = vertical blanking pulse.
HSY = horizontal sync pulse.
AGV = actual gain value.
FGV = frozen gain value.
FGVI) > GUDL.
STOP
NO ACTION
0
1/F
1
4
248
0
1
ANTI-ALIAS FILTER
0
1/L
ANALOG INPUT
1
Fig.15 Gain flow chart.
254
AMPLIFIER
GAIN ACCUMULATOR (18 BITS)
VBLK
X = 0
ADC
1/LLC2
1
1
ACTUAL GAIN VALUE 9-BIT (AGV) [ 3/ 6 dB ]
AGV
HOLDG
1
48
0
1
1
9
1
X
gain
0
1
GAIN VALUE 9-BIT
1/LLC2
X
0
1
0
UPDATE
HSY
LUMA/CHROMA DECODER
0
HSY
1
1/LLC2
X = 1
DAC
0
1
0
Y
SAA7108E; SAA7109E
254
0
FGV
MHB531
/ 0
0
9
Product specification