TDA18271HD/C2,557 NXP Semiconductors, TDA18271HD/C2,557 Datasheet - Page 21
TDA18271HD/C2,557
Manufacturer Part Number
TDA18271HD/C2,557
Description
IC TV SILICON TUNER 64-HLQFN
Manufacturer
NXP Semiconductors
Type
Silicon Tunerr
Specifications of TDA18271HD/C2,557
Applications
Set-Top Boxes
Mounting Type
Surface Mount
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
935285058557
TDA18271HD/C2
TDA18271HD/C2
TDA18271HD/C2
TDA18271HD/C2
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NXP Semiconductors
Table 24.
Legend: * power-on reset value.
TDA18271HD_4
Product data sheet
Address
20h
21h
22h
23h
24h
25h
26h
EB1 to EB23 - Extended bytes 1 to 23 (address 10h to 26h) bit description
Register
EB17
EB18
EB19
EB20
EB21
EB22
EB23
Bit
7 to 0
7
6 to 2
1 and 0 AGC1_GAIN[1:0]
7 to 0
7 and 6 EB20[7:6]
5
4 to 0
7
6 to 2
1 and 0 AGC2_GAIN[1:0]
7
6 to 4
3 to 0
7 to 3
2
1
0
Symbol
EB17[7:0]
AGC1_LOOP_OFF
EB18[6:2]
EB19[7:0]
FORCE_LOCK
EB20[4:0]
AGC2_LOOP_OFF
EB21[6:2]
EB22[7]
RF_TOP[2:0]
IF_TOP[3:0]
EB23[7:3]
FORCELP_
FC2_EN
LP_FC
EB23[0]
Rev. 04 — 19 May 2009
Access
W
R/W
R/W
R/W
W
W
W
W
R/W
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
Value
000X XXXX*
1
0*
00000*
00*
01
10
11
000X XX00*
10*
1
0*
X XXXX*
1
0*
00000*
00*
01
10
11
0*
100*
1000*
1 0110*
0*
0*
0*
Description
extended byte 17
turns the AGC1 loop
extended byte 18
AGC1 gain
extended byte 19
extended byte 20
forces the internal lock indicator
extended byte 20
turns the AGC2 loop
extended byte 21
AGC2 gain
extended byte 22
Take-Over Point of the RF AGC,
detection in RF
Take-Over Point of the RF AGC,
detection in IF
extended byte 23
FM filter selection; see
Table 26
extended byte 23
off
on
6 dB
9 dB
12 dB
15 dB
forced to logic 1
not forced
off
on
15 dB
12 dB
9 dB
6 dB
…continued
TDA18271HD
© NXP B.V. 2009. All rights reserved.
Silicon Tuner IC
Table 25
21 of 70
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