TDA18271HD NXP Semiconductors, TDA18271HD Datasheet - Page 21

• Manufacturer Part Number: TDA18271HD
• Description: Silicon Tuner IC
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 24.
Legend: * power-on reset value.
TDA18271HD_3
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. 03 — 11 September 2008
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
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Silicon Tuner IC
Table 25
21 of 69
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