TDA8295 Datasheet, PDF (26/77 Pages) NXP Semiconductors – Digital global standard low IF demodulator for analog TV and FM radio

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