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TEF6862 データシート(PDF) 14 Page - NXP Semiconductors

部品番号. TEF6862
部品情報  Car Radio Enhanced Selectivity Tuner (CREST)
ダウンロード  65 Pages
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メーカー  PHILIPS [NXP Semiconductors]
ホームページ  http://www.nxp.com
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TEF6862 Datasheet(HTML) 14 Page - NXP Semiconductors

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TEF6862_1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 14 September 2006
14 of 65
Philips Semiconductors
TEF6862
Car Radio Enhanced Selectivity Tuner (CREST)
8.1.3 Read mode: data byte ACDREAD
After AFU sampling the content of the byte ACDREAD is held until the next I2C-bus read.
The values ACD and MOD and the WAM bit can be used as quality indicators of the
alternate frequency. The OFFS bit cannot be used because of too slow attack time.
See Figure 14 and Figure 15.
8.1.4 Read mode: data byte LEVEL
Table 10.
TUNER - data byte 1h bit description
Bit
Symbol
Description
7 and 6
RAGC[1:0]
RF AGC attenuation indicator, PIN diode current on pins IAMAGC or
IFMAGC
00 = < 0.1 mA
01 = 0.1 mA to 0.5 mA
10 = 0.5 mA to 2.5 mA
11 = > 2.5 mA
5
-
not used
4 to 0
IFBW[4:0]
FM IF filter bandwidth control 45 kHz to 130 kHz
Table 11.
ACDREAD - data byte 2h bit allocation
7
6
5
4
3
2
1
0
ACD2
ACD1
ACD0
MOD2
MOD1
MOD0
OFFS
WAM
Table 12.
ACDREAD - data byte 2h bit description
Bit
Symbol
Description
7 to 5
ACD[2:0]
adjacent channel detector value
4 to 2
MOD[2:0]
modulation detector value
1
OFFS
offset detector result
0 = no offset detected
1 = offset detected (adjacent channel breakthrough)
0
WAM
wideband AM detector result
0 = no WAM detected
1 = WAM detected (multipath or co-channel)
Table 13.
LEVEL - data byte 3h bit allocation
7
6
5
4
3
2
1
0
LEV7
LEV6
LEV5
LEV4
LEV3
LEV2
LEV1
LEV0
Table 14.
LEVEL - data byte 3h bit description
Bit
Symbol
Description
7 to 0
LEV[7:0]
level detector output value Vlevel [V] = 164LEV[7:0] + 0.25


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