tda8822 NXP Semiconductors, tda8822 Datasheet - Page 4

• Manufacturer Part Number: tda8822
• Description: Universal I2c-bus Programmable Rf Modulator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
BLOCK DIAGRAM
1997 Jan 08
handbook, full pagewidth
Universal I
modulator
PREEMPH
NICAM
AUDIO
TPSG
SDA
ACP
SCL
P0
3
14
15
16
17
21
22
2
2
C-bus programmable RF
CLAMP
VIDEO
NICAM
AUDIO
AMP.
AMP.
CHARGE
RECEIVER
AUDIO
PUMP
I
2
LOGIC
24
C-BUS
AND
test
DEV
setting
VIDEO
AMP.
I
2
C-bus control
MD setting
VCO
DETECTOR
f div(audio)
f div(video)
f ref(video)
f ref(audio)
in-lock flag
PHASE
AUDIO
V CCD
frequency
setting
11
sound oscillator
ON/OFF
test
TPSG
CLIP
DGND
SND-IF
AMP.
Fig.1 Block diagram.
setting
13
PS
SWITCH
AGND
DETECTOR
REFERENCE
4
PHASE
VIDEO
DIVIDER
DIVIDER
test
DIVIDER
23
14 BITS
TPSG
ON/OFF
PROG.
PROG.
REGULATOR
frequency
setting
ADDER
VOLTAGE
CHARGE
PRESCALER
DIVIDE-BY-8
VIDEO
PUMP
OSCILLATOR
V CCA
TDA8822
CRYSTAL
1
RF oscillator
test
ON/OFF
OSCILLATOR
LOOP
AMP.
RFA
OUTPUT
BUFFER
MIXER
19
RF
test
RFB
Preliminary specification
18
MGE674
20
10
12
TDA8822
4
6
7
8
9
5
RFGND
RFOSCA
RFOSCB
OGND
RFOSCC
RFOSCD
VCP
VVT
XTAL