TEF6903AH/V5S,557 NXP Semiconductors, TEF6903AH/V5S,557 Datasheet - Page 42
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TEF6903AH/V5S,557
Manufacturer Part Number
TEF6903AH/V5S,557
Description
IC CAR RADIO SGL CHIP CIRC 80QFP
Manufacturer
NXP Semiconductors
Specifications of TEF6903AH/V5S,557
Modulation Or Protocol
AM, FM, WB
Applications
AM/FM Radio Receiver
Current - Receiving
102mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
8 V ~ 9 V
Operating Temperature
-40°C ~ 85°C
Package / Case
80-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Frequency
-
Sensitivity
-
Memory Size
-
Data Rate - Maximum
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
935288823557
NXP Semiconductors
TEF6903A_3
Product data sheet
8.2.10.1 Factory alignment of bits IFCAP[3:0]
8.2.10.2 Initialization of the radio
8.2.10.3 Factory alignment of IFCF
8.2.10 Write mode: data byte IFCAP
Table 46.
Table 47.
The fully integrated IF2 filter of the TEF6903A has to be aligned in order to achieve the
optimum performance at all ambient conditions.
FM IF filter operation point alignment: data byte IFCAP: a single alignment of the FM IF
filter operation range secures an accurate and continuous frequency setting over the full
temperature range and all FM bands.
During radio initialization bit IFCAPA (is logic 1) is used for writing the stored IFCAP[3:0]
value. Afterwards set bit IFCAPA to a logic 0 to start normal operation. Writing of the
IFCAP byte with the alignment value is allowed during radio operation but requires a
setting of bit IFCAPA to logic 0.
FM IF filter center frequency alignment: data byte IFCF: to correct IF frequency errors
caused by an error in the crystal frequency the alignment is preferably performed for every
FM band in use. A test frequency in the center of the band is preferred. An accurate
alignment result is realized by testing for symmetrical filter attenuation.
Bit
7
6 to 4
3 to 0
1. Set bit IFCAPA to logic 1 to disable internal IFCAP control
2. Decrease IFCAP from 15 downwards until I
3. Save this IFCAP setting as alignment value
4. Set bit IFCAPA to logic 0 to return to normal operation
1. Set RF generator level V
2. Set bit IFCFA to logic 1 to enable fast settling of the filter frequency
3. Set bit IFNBW to logic 1 for accuracy (filter is set to narrow 57 kHz bandwidth)
4. Test high side of filter curve: tune to f
IFCAPA
changes from logic 1 to logic 0
(Japan/OIRT)
7
0
IFCAP - format of data byte 08h with default setting
IFCAP - data byte 08h bit description
Symbol
IFCAPA
-
IFCAP[3:0]
6
0
Rev. 03 — 3 April 2008
Description
FM IF filter capacitor align
reserved; 0 = normal operation
IF filter capacitor. Setting of FM IF filter capacitor value by means of
bit IFCAPG of read data byte 5, ID; see
IFCAPA = 1. For alignment set IFCAPA = 1 and check, when read bit
IFCAPG changes from logic 0 to logic 1).
5
0
0 = standard operation
1 = align mode and initialization mode (auto correct disabled)
RF
= 200 V
4
0
RF
50 kHz (Europe/USA) or f
IFCAP3
2
C-bus read bit IFCAPG (read byte 5; ID)
3
1
IFCAP2
2
0
Table 19
TEF6903A
Integrated car radio
IFCAP1
(For initialization set
© NXP B.V. 2008. All rights reserved.
RF
1
0
+ 33.3 kHz
IFCAP0
42 of 110
0
0