LV25700PM Datasheet, PDF (55/68 Pages) Sanyo Semicon Device – For Car Radio Single chip Tuner IC

LV25700PM
SA35. FM Limiting Sensitivity Adjustment 2
D7
D6
D5
D4
D3
D2
D1
D0
MUTE_SMR_SLC_7 MUTE_SMR_SLC_6 MUTE_SMR_SLC_5 MUTE_SMR_SLC_4 MUTE_SMR_SLC_3 MUTE_SMR_SLC_2 MUTE_SMR_SLC_1 MUTE_SMR_SLC_0
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
Function
FM limiting sensitivity adjustment 2
Adjusting the threshold value (second start point: Mute voltage slope x 2) at which noise
0
0
0
0
0
0
0
0
convergence is to be achieved.
0: Threshold value Low (weak electric field)
0
0
0
0
0
0
0
1
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1 255: Threshold value High (strong electric field)
SA36. FM Limiting Sensitivity Adjustment 1
D7
D6
D5
D4
D3
D2
D1
D0
MUTE_SMR_ZERO_7 MUTE_SMR_ZERO_6 MUTE_SMR_ZERO_5 MUTE_SMR_ZERO_4 MUTE_SMR_ZERO_3 MUTE_SMR_ZERO_2 MUTE_SMR_ZERO_1 MUTE_SMR_ZERO_0
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
Function
FM limiting sensitivity adjustment 1
Adjusting the threshold value (first start point: Mute voltage slope x 1) at which -3 dB
0
0
0
0
0
0
0
0
sensitivity adjustment is to be performed.
0: Threshold value Low (weak electric field)
0
0
0
0
0
0
0
1
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1 255: Threshold value High (strong electric field)
SA37. Modulation Index Detection Sensitivity (+ Side)
D7
D6
D5
D4
D3
D2
D1
D0
BPF_MOD_MAX_7 BPF_MOD_MAX_6 BPF_MOD_MAX_5 BPF_MOD_MAX_4 BPF_MOD_MAX_3 BPF_MOD_MAX_2 BPF_MOD_MAX_1 BPF_MOD_MAX_0
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
Function
IF filter modulation index detection threshold value [+ side] = Low
0
0
0
0
0
0
0
0 * Provide hysteresis with respect to the Narrow/SA38 settings if the threshold value is
exceeded.
0
0
0
0
0
0
0
1
↓
1
1
1
1
1
1
1
0
IF filter modulation index detection threshold value [+ side] = High
1
1
1
1
1
1
1
1 * Provide hysteresis with respect to the Narrow/SA38 settings if the threshold value is
exceeded.
No.A1709-55/68