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TDA7421 датащи(PDF) 20 Page - STMicroelectronics

номер детали TDA7421
подробное описание детали  AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS
PDF  38 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7421 датащи(HTML) 20 Page - STMicroelectronics

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background image
S
1
1
0
0
0
1
0
0
ACK
ACK
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
D96AU549
T2
I
SUBADDRESS
DATA 1 to DATA n
T1 T0
A3 A2 A1 A0
Frame Example
For addressing the PLL part:
D96AU550
S
1
1
0
0
0
1
1
0
ACK
ACK
ACK
P
MSB
LSB
MSB
LSB
MSB
LSB
CHIP ADDRESS
0I
SUBADDRESS
DATA 1 to DATA n
00
A3 A2 A1 A0
for the TUNER part:
ACK = Acknowledge
S = Start
P = Stop
I = Page mode
T2, T1, T0 = used in test mode (for PLL only, for
TUNER addressing they must be 0)
A3, A2, A1, A0 = Mode selection
TUNER SUBADDRESS
MSB
LSB
FUNCTION
X
X
X
I
A3
A2
A1
A0
0
0
0
0
STATUS
0
0
0
1
FM STOP STATION / FM IF AGC
0
0
1
0
FM SMETER SLIDER
0
0
1
1
AM AGC1 / AM STOP STATION
0
1
0
0
IFT1 / IFT2
0
1
0
1
FRONT END ADJUSTMENT
0
1
1
0
FM DEMODULATOR ADJUSTMENT
0
1
1
1
FM IF BUFFERS
1
0
0
0
FM AUDIO MUTE GAIN / FM SOFT MUTE
1
0
0
1
FM HOLE DETECTOR / FM DETUNING
0
Page mode disabled
1
Page mode enabled
0
0
0
must be "0"
PLL SUBADDRESS
MSB
LSB
FUNCTION
T3
T2
T1
I
A3
A2
A1
A0
0000
Charge pump control
0001
PLL counter 1 (LSB)
0010
PLL counter 2 (MSB)
0011
PLL reference counter 1 (LSB)
0100
PLL reference counter 2 (MSB)
0101
PLL lockdetector control and PLL mode select
0110
IFC reference counter 1 (LSB)
0111
IFC reference counter 2 (MSB) and IFC mode select
1000
IF counter control 1
1001
IF counter control 2
0
page mode DISABLED
1
page mode enabled
T1, T2, T3 are used for testing the PLL, in application mode they have to be "0".
TDA7421
20/38



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