LV25200M_10 Datasheet, PDF (39/45 Pages) Sanyo Semicon Device – Single chip Tuner IC for Car Radio

LV25200M
Continued from preceding page.
No.
Control block/data
(34) Weak input
MUTE changeover
D31-16 to D31-18
(35) AM/FM SD-adj
NC-AGC threshold voltage
setting data
D31-19 to D32-23
(36) FM IF-Gain
/AM NC Gain control data
D32-24 to D32-27
(37) TUNER OFF setting data
D32-28
¤ Changes over weak input MUTE.
3BIT
Description
¤ Controls SD characteristic of AM/FM.
Sets the threshold voltage of NC-AGC.
5BIT
¤ Controls Gain of FM IF limiter AMP.
Controls also Gain of IF limiter AMP in the AM mode similarly to the FM mode.
4BIT
¤ Data to set the mode to turn OFF the tuner.
1BIT
Tuner OFF mode
0 Normal operation
1 Tuner-OFF
(38) AM/FM WAGC setting data ¤ Data to set the AM/FM WAGC sensitivity.
D33-0 to D33-3
4BIT
(39) AM/FM NAGC setting data ¤ Data to set the AM/FM NAGC sensitivity.
D33-4 to D33-7
4BIT
(40) Keyed-AGC/
¤ Controls FM Keyed-AGC sensitivity.
AM-IF-Gain setting data
Controls AM-IF-GAIN.
D33-8 to D33-11
4BIT
(41) SD detection bandwidth
¤ Used to set the SD detection bandwidth at FM-SEEK.
setting/band variable filter
Used to set the start point of band variable filter at FM reception.
start point setting data
4BIT
D33-12 to D33-15
(42) Null Voltage setting data
¤ Controls the FM Null voltage.
D33-16 to D33-20
5BIT
(43) QDP-ADJ setting data
¤ Controls the FM QDP voltage.
D33-21 to D33-24
4BIT
(44) FM MUTE-ATT SW/AM
¤ FM: Controls FM MUTE-ATT-SW characteristic.
S-meter shifter control
D33-25 to D33-26
AM: Controls S-meter shifter circuit output value.
2BIT
Mute-ATT-SW/AM-Vsm-Shift
0 0 Low (steep inclination)
10
01
1 1 High (gengle inclination)
(45) VREF2.7V adj control
D33-27 to D33-28
¤ Sets the Vref2.7V output voltage to the target value.
2BIT
Vref2.7V ADJ
0 0 Low
1 0 Typ
0 1 Little High
1 1 High
(46) Separation control
¤ Controls separation of L/R output level in the FM stereo mode.
D34-0 to D34-5
6BIT
(47) FM SNC/
¤ Sets FM SNC characteristic.
AM-RF-AGC AMP
Sets AM-RF-AGC AMP (gentle inclination side) threshold voltage.
Threshold value (gentle
5BIT
inclination side) setting data
D34-6 to D34-10
(48) FM/AM HCC setting data
¤ Sets HCC characteristic of FM and AM.
D34-11 to D34-15
5BIT
(49) SNC inclination setting data ¤ Sets inclination of SNC voltage (sets the separation curve).
D34-16 to D34-17
2BIT SNC inclination
00
10
↓
01
↓
11
Related data
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