LV25400W_0712 Datasheet, PDF (32/42 Pages) Sanyo Semicon Device – For Automotive Applications DSP Tuner Front End

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No.
Control block/data
(6) Tuner mode switching
AM/FM oscillator divisor
OSC_DIV
WB
(7) FM IQ mixer phase
adjustment
DELAY_ADJ0
DELAY_ADJ1
LV25400W
Description
(1) AM/FM/WB oscillator divisor control
WB
OSC DIV
Divisor
0
0
Divide by 2
0
1
Divide by 3
1
0
Divide by 1
1
1
Divide by 1
* : WB: Select 1 for weather band reception
Related data
P0 to P15
DVS
(2) AM oscillator divisor control
OSD D2
OSC D1
Divisor
0
0
Divide by 10
1
0
Divide by 8
0
1
Divide by 6
1
1
Divide by 4
In FM mode, only the WB and OSC DIV bits are valid.
In AM mode, this function is set up by combination of the OSC D2, OSC (however, this is
fixed at the divide-by-2 setting) D1, WB, and the OSC DIV bits.
FM (Japan) : Fixed at the divide-by-3 setting
FM (other regions) : Fixed at the divide-by-2 setting
WB : Fixed at the divide-by-1 setting (OK if WB = 1)
In AM mode, set WB = 0, OSC DIV = 0 for the divide-by-2 setting.
The OSC D2 and OSC D1 bits can be set according to end product needs.
Example : USA : (1) <divide by 2> × (2) <divide by 10> = divide by 20
SW2 : (1) <divide by 2> × (2) <divide by 4> = divide by 8
• FM IQ mixer phase adjustment
FM-IQMIX phase_Adjust
DELAY_ADJ0
0
0
1
1
DELAY_ADJ1
0
1
0
1
Adjustment amount
Small
↓
↓
Large
OSC_DIV
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