tda8296 NXP Semiconductors, tda8296 Datasheet - Page 41

• Manufacturer Part Number: tda8296
• Description: Tda8296 Digital Global Standard Low If Demodulator For Analog Tv And Fm Radio
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8296
Product data sheet
Table 39.
Table 40.
[1]
Bit
7 to 0 AFC[7:0]
Deviation from nominal
IF frequency
f
f
:
f
f
:
f
f
f
:
f
f
:
f
f
IF
IF
IF
IF
IF
IF
IF
IF
IF
IF
IF
= f
= f
= f
= f
= f
= f
= f
= f
= f
= f
= f
See
nom
nom
nom
nom
nom
nom
nom
nom
nom
nom
nom
Symbol
Section 12
− 1 674.3 kHz
− 1 661.1 kHz
− 830.6 kHz
− 817.4 kHz
− 13.2 kHz
+ 13.2 kHz
+ 830.6 kHz
+ 843.8 kHz
+ 1 674.3 kHz
+ 1 687.5 kHz
AFC register (address 25h) bit description
Calculation of frequency deviation from AFC value
[1]
Digital global standard low IF demodulator for analog TV and FM radio
All information provided in this document is subject to legal disclaimers.
for nominal IF frequencies.
Access Value
R
Rev. 1 — 3 March 2011
AFC[7] AFC[6] AFC[5] AFC[4] AFC[3] AFC[2] AFC[1] AFC[0]
0
0
:
0
0
:
0
0
1
:
1
1
:
1
1
-
1
1
:
0
0
:
0
0
1
:
1
1
:
0
0
Description
This is the readout for AFC. AFC contains the
frequency deviation from nominal IF picture carrier.
The format is twos complement, 13.2 kHz steps are
done per LSB. See
deviation could also be given by the following formula:
deviation from the nominal IF picture carrier greater
than the FPLL pull-in capability (−830.6 kHz to
+843.8 kHz or −1 674.3 kHz to +1 687.5 kHz), the
output reading is undefined. The AFC lock indication
can be taken from the N_H_LOCK information from the
H-sync PLL. The lock occurs inside a frequency
window, which is determined by the pull-in capability of
the FPLL.
f
IF
1
1
:
1
1
:
0
0
1
:
0
0
:
0
0
–
f
nom
=
1
1
:
1
1
:
0
0
1
:
0
0
:
0
0
–
--------------------------------- - (kHz)
AFC
512
×
Table 40
1
1
:
1
1
:
0
0
1
:
0
0
:
0
0
6 750
for details. The frequency
1
1
:
1
1
:
0
0
1
:
0
0
:
0
0
. For a frequency
TDA8296
© NXP B.V. 2011. All rights reserved.
1
1
:
1
1
:
0
0
1
:
0
0
:
0
0
1
0
:
1
0
:
1
0
1
:
1
0
:
1
0
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