LV25200M Datasheet, PDF (40/45 Pages) Sanyo Semicon Device – Bi-CMOS IC Single chip Tuner IC for Car Radio

LV25200M
Continued from preceding page.
No.
Control block/data
(50) Pilot cancel control
D34-18 to D34-19
(51) De-emphasis select data
D34-20
(52) Force NOMO setting data
D34-21
Description
¤ Data to control the pilot cancel degree.
2BIT Pi-Can (Pilot Cancel Level Control)
0 0 Center (AM-NC=OFF)
1 0 Low (same as above)
0 1 High (same as above)
1 1 OFF (AM-NC=ON)
¤ Data to select the De-Emphasis constant of L/R output.
1BIT
De-emphasis
0 50μs
1 75μs
¤ Data to force L/R output to the MONO mode.
1BIT
0 Normal
1 Forced MONO
Related data
(53) Noise-AGC
Threshold voltage forced
application data
D34-23
¤ Data to change the sensitivity by applying the Noise-AGC Threshold voltage in a forced
manner.
1BIT
Noise-AGC
Threshold voltage forced application
0 OFF (Normal)
1 ON(control with SD-ADJ-DAC)
(54) Noise sensitivity setting data
D34-24 to D34-25
¤ Controls the noise detection sensitivity.
2BIT
Noise-Sens setting
0 0 Easy to detect
10
↓
01
↓
1 1 Difficult to detect
(55) AC S-meter
Load changeover data
D34-26
(56) Noise-AGC limit setting data
D34-27
¤ S-meter output (Vsm2_sub):
Data to change over the output impedance (internal load resistance) of pin 40
1BIT
AC-S meter load changeover
0 Hi (7kΩ)
1 Low (3.5kΩ)
¤ Data to changeover the AGC limiter of noise canceller.
1BIT
Noise-AGC
0 No Limit (AGC easy to be effective)
1 Limit (AGC difficult to be effective)
(57) D34-28
¤ No function
1BIT
0 0 : Normal setting
1
(58) MPX VCO control data
D35-0 to D35-5
(59) VCO ON measurement bit
D35-6
(60) HCC SW changeover bit
D35-6
¤ Data for control to the MPX-VCO block free-run oscillation frequency of 304kHz
6BIT
¤ MPX-VCO block free-run oscillation frequency
During measurement: High
1BIT
¤ Data to change the HCC function AM/FM mode
1BIT
HCC SW
1 FM
0 AM
(61) Filter-Wide fixed sensitivity/ ¤ Sets the Filter-Wide fixed sensitivity.
AM-RF-AGC AMP
Sets the AM-RF-AGC AMP (steep inclination side) threshold voltage.
Threshold value (steep
4BIT
inclination side) setting data
D35-8 to D35-11
(62) Filter initial adjustment bit
¤ Data for various initial settings of the filter
D35-12 to D35-24
13BIT
D12-14
Gain
Gain adjustment
D15-19
CF
CF adjustment
D20-24
BW/G
BW/G adjustment
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