TEF6903AH/V2,557 NXP Semiconductors, TEF6903AH/V2,557 Datasheet - Page 72
TEF6903AH/V2,557
Manufacturer Part Number
TEF6903AH/V2,557
Description
IC INTEGRATED CAR RADIO 80-QFP
Manufacturer
NXP Semiconductors
Datasheet
1.TEF6903AHV5S518.pdf
(110 pages)
Specifications of TEF6903AH/V2,557
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
935281201557
TEF6903AH/V2
TEF6903AH/V2
TEF6903AH/V2
TEF6903AH/V2
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NXP Semiconductors
TEF6903A_3
Product data sheet
8.2.25 Write mode: data byte LOUDNESS
Table 98.
Table 99.
[1]
Table 100. VU-meter timing; HTC[2:0] of data byte 0Bh; TIMING
[1]
Bit
7
6
5
4
3
2 to 0
HTC2
0
0
0
0
1
1
1
1
AVUM
The VU-meter mode can be used with external sources only. When the VU-meter mode is active, the radio
quality detection of USN, MOD and offset is limited to AF update tuning only. During VU-meter mode the
bits MOD[4:0] indicate the external source input amplitude. The FM dynamic bandwidth control is disabled
and a fixed bandwidth of 113 kHz is defined. However, other fixed bandwidth settings are available by
DYN = 0 and the setting of BW; data byte 0h (see
control. VU-meter mode is automatically activated when audio compression is on (COMP = 1).
Setting HTC[2:0] is also in use for setting the timing of weak signal high cut control during radio operation.
7
0
LOUDNESS - format of data byte 17h with default setting
LOUDNESS - data byte 17h bit description
Symbol
AVUM
ASFD
-
LDON
LDHB
LDS[2:0]
ASFD
6
0
HTC1
0
0
1
1
0
0
1
1
Description
audio VU-meter mode
ASI filter disable
reserved; 0 = normal operation
loudness on
loudness high boost; see
loudness start setting; loudness start defines the volume setting below
which loudness control is activated; see
Rev. 03 — 3 April 2008
0 = MOD read information indicates the modulation of the radio
channel
1 and an external input source is selected = MOD read information will
indicate the input amplitude of the selected source
0 = normal operation
1 = no low-pass filter inserted during ASI
0 = loudness control is disabled
1 = loudness control is active; loudness is controlled by the volume
setting
0 = loudness control is limited to bass gain
1 = loudness controls bass gain and treble gain
5
0
LDON
HTC0
0
1
0
1
0
1
0
1
4
0
[1]
Table
Figure 40
LDHB
28). See
3
1
t
0.02 s
0.02 s
0.02 s
0.02 s
0.02 s
0.02 s
0.02 s
0.02 s
attack
Table 100
LDS2
Table 101
2
1
[1]
for compression recovery timing
TEF6903A
Integrated car radio
and
LDS1
© NXP B.V. 2008. All rights reserved.
1
0
t
0.03 s
0.06 s
0.2 s
5 s
0.6 s
10 s
1 s
2 s
Figure 40
recovery
LDS0
72 of 110
0
0
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