tda8295 NXP Semiconductors, tda8295 Datasheet - Page 26

• Manufacturer Part Number: tda8295
• Description: Tda8295 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8295_1
Product data sheet
Table 19.
Legend: * = default value.
Table 20.
Legend: * = default value.
Bit
7
6
5 to 0 FLL_LIM[5:0] R/W
Bit
7 to 5 -
4 to 0 CAR_DET_LVL[4:0] R/W
Symbol
FLL_ON
LIM_ON
Symbol
PC_FLL_FUNC register (address 07h) bit description
CARDET_LEVEL register (address 08h) bit description
Digital global standard low IF demodulator for analog TV and FM radio
Access Value
R/W
R/W
Rev. 01 — 4 February 2008
Access Value
R/W
0
1*
0*
1
00 0001
00 0010
00 0100*
00 1000
01 0000
10 0000
-
0 0001
0 0010
0 0100
0 1000*
1 0000
X XXXX
Description
The FLL can be switched off for debugging purposes.
In Functional mode, FLL_ON must be logic 1 for all
cases.
The default value is logic 0 to have a normal action
FLL. However, some flexibility has been included for
field investigations and debugging purposes.
With these settings, the FLL action can be reduced. For
better acquisition behavior, a large value should be
chosen. The settings are ‘don’t care’ if LIM_ON is
logic 0.
FLL off (only for debugging)
FLL on
limitation off
limitation on
1
1
1
1
1
1
4096
2048
1024
512
256
128
Description
not used
determines the action threshold of the above
carrier detector; if carrier detector is off,
CAR_DET_LVL settings are irrelevant
FS
FS
FS
FS
FS
FS
carrier detector action below 0.5 % residual PC
carrier detector action below 1 % residual PC
carrier detector action below 2 % residual PC
carrier detector action below 4 % residual PC
carrier detector action below 8 % residual PC
don’t care if CAR_DET = 0
TDA8295
© NXP B.V. 2008. All rights reserved.
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