LV25400W Sanyo Semicon Device, LV25400W Datasheet - Page 32

• Manufacturer Part Number: LV25400W
• Description: DSP Tuner Front End
• Manufacturer: Sanyo Semicon Device

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Continued from preceding page.
No.
(6)
(7)
Tuner mode switching
AM/FM oscillator divisor
OSC_DIV
WB
FM IQ mixer phase
adjustment
DELAY_ADJ0
DELAY_ADJ1
Control block/data
(1) AM/FM/WB oscillator divisor control
* : WB: Select 1 for weather band reception
(2) AM oscillator divisor control
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
• FM IQ mixer phase adjustment
DELAY_ADJ0
OSD D2
WB
0
0
1
1
0
1
0
1
0
0
1
1
SW2 : (1) <divide by 2> × (2) <divide by 4> = divide by 8
FM-IQMIX phase_Adjust
DELAY_ADJ1
OSC DIV
LV25400W
OSC D1
0
1
0
1
0
0
1
1
0
1
0
1
Description
Adjustment amount
Divide by 10
Divide by 2
Divide by 3
Divide by 1
Divide by 1
Divide by 8
Divide by 6
Divide by 4
Divisor
Divisor
Small
Large
↓
↓
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P0 to P15
DVS
OSC_DIV
Related data
No.A0633-32/42
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