SANYO LV25700PM

Ordering number : ENA1709
Bi-CMOS IC
LV25700PM
For Car Radio
Single chip Tuner IC
Overview
The LV25700PM is a tuner IC for car radio, which incorporates an AM/FM Tuner, PLL, AM/FM Noise Canceller (NC),
FM Stereo-decoder (MPX), Multipath-noise Rejection Circuit (MRC), and RDS Demodulator Logic-controller. The basic
performance is based on the LV25210, and both adjustment-free operation and software control of the IF band variable
filter are possible.
This IC enables easy configuration of a low-cost, high performance analog tuner for OEM.
Functions
• AM/FM + FE + PLL + IF + NC + MPX + MRC + RDS Demodulator + Logic-controller
Features
• World-wide compatible tuners
World-wide compatible tuners can be configured and supplied with a single tuner IC.
FM is compatible with U.S., European, Japanese and Weather bands, while AM is compatible with LW, MW and SW.
High performance image cancel mixer incorporated in FM MIX.
PLL fast locking, RDS demodulator and AM/FM noise canceller incorporated
• Self-contained type IF band variable filter incorporated
Detects any neighboring interfering FM stations and the modulation index, and enables various bandwidth settings of the
IF bandpass filter by using the software incorporated in the IC.
Continued on next page.
•
•
CCB is a registered trademark of SANYO Electric Co., Ltd.
CCB is SANYO Semiconductor's original bus format. All bus addresses are managed by SANYO
Semiconductor for this format.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
60910 SY PC 20100415-S00002 No.A1709-1/68
LV25700PM
Continued from preceding page.
• Auto alignment EEPROM not necessary. It is incorporated inside the IC
FM RF, VCO, Null-voltage, Mute-on, Mute-ATT, SNC, HCC, Separation, S-meter, AM/FM AGC sensitivity,
AM/FM IF gain, SD sensitivity, I2C bus compatible
* This IC can be supplied in the adjusted state. Some adjustments are necessary depending on the specifications and
external components.
• Other functions
Neighboring interference (Quality Out) RDS AF-search support
I2C communication bus
Specifications
Absolute Maximum Ratings at Ta = 25°C, GND = 0V
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
VCC_H max
8.7
V
VCC_L max
5.7
V
VDD max
6.5
V
VDDBUS max
6.5
V
Maximum input current
VIN max
6.5
V
Maximum output current
VO max
6.5
V
Allowable power dissipation
Pd max
Operating temperature
Topr
-40 to +85
°C
Storage temperature
Tstg
-40 to +150
°C
(Ta ≤ 85°C)
1040
mW
Recommended Operating Conditions at Ta = 25°C, GND = 0V
Parameter
Recommended supply voltage
Symbol
Conditions
Ratings
Unit
VCC_H
PIN 1, 2, 15, 68, 80
8.0
V
VCC_L
PIN 53, 74
5.0
V
VDD
PIN 35
5.0
V
VDDBUS
PIN 34
5.0
V
Recommended Operating Conditions at Ta = 25°C, GND = 0V
Parameter
Operating supply voltage range
Symbol
Conditions
Ratings
min
typ
Unit
max
VDD
PIN 35
4.5
5.0
5.5
V
VDDBUS
PIN 34 (*1)
3.0
5.0
5.5
V
VCOP_H
PIN 1, 2, 15, 68, 80
7.5
8.0
8.5
V
VCOP_L
PIN 53, 74
4.5
5.0
5.5
V
VDDLOGIC
PIN 35
3.5
5.5
V
Internal supply
VREG
PIN 36 VDDLOGIC > 3.5V (*2)
Input High level voltage
VIH
PIN 31, 32, 33
0.8VDDBUS
VDDBUS
V
Input Low level voltage
VIL
PIN 31, 32, 33
0
0.2VDDBUS
V
Input amplitude voltage
VIN
PIN 39
Input frequencies
FIN
PIN 39
Input High level current
IIH (1)
PIN 39, VI = VDD = 5.0V
IIH (2)
PIN 31, 32, 33
VI = VDD = VDDBUS = 5.0V
Input Low level voltage
IIL (1)
PIN 39, VI = VDD = VSS
IIL (2)
VI = VSS
Hysteresis width
VH
PIN 31, 32, 33
Output High level voltage
VOH (1)
PIN 26, 27, 28, 29, 30
IO = -1mA, VDD = VDDBUS
VOH (2)
VOH (3)
Logic operation, memory hold
voltage range
3.0
0.5
V
1.5
20.5
2.0
5.0
2.0
5.0
0.1VDDBUS
0.2VDDBUS
Vrms
MHz
15.0
μA
3.0
μA
15.0
μA
3.0
μA
V
VDD-1.0
V
PIN 38
IO = -200μA, VDD = VDDBUS
VREG-1.0
V
PIN 21, 22
IO = -500μA, VDD = VDDBUS
VDD-1.0
V
Continued on next page.
No.A1709-2/68
LV25700PM
Continued from preceding page.
Parameter
Symbol
Output Low level voltage
Output off leak current
RESET application time at power
Conditions
Ratings
min
typ
Unit
max
VOL (1)
PIN 26, 27, 28, 29, 30
IO = -1mA, VDD = VDDBUS
1.0
V
VOL (2)
PIN 38
IO = -200μA, VDD = VDDBUS
1.0
V
VOL (3)
PIN 21, 22
IO = -500μA, VDD = VDDBUS
1.0
V
VOL (4)
PIN 31, 32
IO = -5mA, VDD = VDDBUS
1.0
V
-3
+3
μA
-100
+100
Ioff(1)
PIN 26, 27, 28, 29, 30, 31, 32
Ioff(2)
PIN 21, 22
tPOR
PIN 33
50
ms
tPDR
PIN 33
50
ms
tCKR
PIN 36 (*2)
80
ms
nA
on.
RESET application time at
instantaneous power failure.
Oscillation stabilization time after
RESET input is completed
(*1): Use with VDD < VDDBUS is prohibited.
(*2): External access to LV25700, other than RESET or power supply, that results in VREG = VDDLOGIC during RESET application and until XIN
oscillation stabilizes (tCKR), should wait until the tCKR time elapses after RESET is released.
Package Dimensions
unit : mm (typ)
3174A
64
0.8
23.2
20.0
41
65
80
17.2
14.0
40
25
24
1
0.8
0.35
0.15
(2.7)
0.1
3.0max
(0.8)
SANYO : QIP80E(14X20)
No.A1709-3/68
LV25700PM
Reset Timing at Power-ON
Vcop_H
Power supplies must be
applied after Low level
input to RESET (Pin 33)
is established.
VDDBUS
Vcop_L/VDDLOGIC
RESET (Low level depends on VDDBUS.)
Input Low level to RESET starting from before power is
applied until 50ms (tPOR) or more after power is stabilized.
tPOR
GND_VSS
tCKR
The power supplies must be applied in the order of 8V to 5V. (can also be applied simultaneously.)
In case the RESET pin is left open, perform pull-down or other pin treatment.
Reset Timing at Instantaneous Power Failure
Vcop_H
VDDBUS
3.5V
Vcop_L/VDDLOGIC
Input Low level to RESET starting from
when the instantaneous power failure is
detected until 50ms (tPDR) or more after
the power supply is stabilized.
Input Low level to RESET when the
VDDLOGIC voltage falls to 3.5V or less.
tPDR
tCKR
GND_VSS
Reset Timing at Power-OFF
The power supplies must be turned off in the order of 5V to 8V.
(can also be turned off simultaneously.)
Vcop_H
Vcop_L/VDDLOGIC
VDDBUS
Input Low level to RESET when the
VDDLOGIC voltage falls to 3.5V or less.
Input Low level to RESET during power off.
3.5V
GND_VSS
No.A1709-4/68
LV25700PM
AC Characteristics
Operating Characteristics at Ta = 25°C, VCC = 8.0V, VDD = 5.0V, unless otherwise specified. Ratings for
publications
* : These measurements are made using the Yamaichi Electronics IC51-0804-819-2 IC socket. An IHF bandpass filter
is used as the audio filter.
[FM Characteristics] FM Front End Mixer Input
Parameter
Current drain-8V
Symbol
ICCOF-8V
Conditions
No input, FM mode
min
typ
max
Unit
60
73
85
mA
37
45
52
mA
400
550
700
mVrms
280
380
480
mVrms
-1
0
1
dB
0.2
1
%
0.3
2.5
%
I1+I2+I15+I68+I80
Current drain-5V
ICCOF-5V
No input, FM mode
I35+I53+I74
Demodulation output
VO-FM_1
98.1MHz, 60dBμV, 1kHz,
100%mod, pin 49
Detection output
VO-FM_2
98.1MHz, 60dBμV, 1kHz,
100%mod, pin 60
Channel balance
CB
Total harmonic distortion
THD-Fm mono (1)
98.1MHz, 60dBμV, 1kHz, pins 49 and 50
98.1MHz, 60dBμV, 1kHz,
100%mod, pin 49
Total harmonic distortion
THD-Fm mono (2)
98.1MHz, 60dBμV, 1kHz,
150%mod, pin 49
Signal to noise ratio (MONO)
S/N-FM-MONO
98.1MHz, 60dBμV, 1kHz,
60
70
dB
58
65
dB
58
67
dB
-30
-25
-20
dB
-23
-18
-13
dB
-11
-6
-1
dB
27
43
1.5
3.8
1.2
3.2
100%mod, pin 49
Signal to noise ratio (ST)
S/N-FM-ST
98.1MHz, 60dBμV, 1kHz,
100%mod, pin 49, L+R = 90%, pilot = 10%
AM suppression ratio
AMR
98.1MHz, 60dBμV, 1kHz, 100%mod,
30% in AM mode, fm = 400Hz, pin 49
Muting attenuation (1)
Att-1
98.1MHz, 60dBμV, 1kHz,
with V64 = 0→2V, pin 49 attenuation
(Mute ATT SW = 0)
Muting attenuation (2)
Att-2
98.1MHz, 60dBμV, 1kHz,
with V64 = 0→2V, pin 49 attenuation
(Mute ATT SW = 2)
Muting attenuation (3)
Att-3
98.1MHz, 60dBμV, 1kHz,
with V64 = 0→1V, pin 49 attenuation
(Mute ATT SW = 2)
Separation
Separation
98.1MHz, 60dBμV, mod = 100%,
dB
pilot = 10%, pin 49 output ratio
Separation control adj
Stereo ON level
ST-ON
Pilot demodulation at which V27 < 0.5V is
5.5
%
established
Stereo OFF level
ST-OFF
Pilot demodulation at which V27 < 3.0V is
%
established
Main distortion factor
THD-Main L
98.1MHz, 60dBμV, L+R = 90%,
0.5
1.2
%
5
10
15
dB
24
30
36
dBμV
-6
-1
4
dBμV
pilot = 10%, pin 49
SNC output attenuation
AttSNC
98.1MHz, 40dBμV, L-R = 90%,
pilot = 10%, pin 49 (L→R)
HCC output attenuation
FM HCC
98.1MHz, 60dBμV, 10kHz,
modulation = 30% reference, input level at
which the output is down by -3dB
Input limiting voltage
Vi-lim
98.1MHz, 60dBμV, 30%mod, MIX input at
which the input reference output is down
by -3dB, V42 = 0V, V29 = 0V,
with MUTE = OFF
Muting sensitivity
Vi-mute
MIX input level at V64 = 0.7V, non-mod
0.1
5
9.9
dBμV
SD sensitivity
SD-senFM
MIX input level at which SD pin is ON, shifter-
20
25
30
dBμV
20
dBμV
adj, non-mod
IF count sensitivity
IF-count-sens. FM
IF count sensitivity at MIX input, non-mod
Continued on next page.
No.A1709-5/68
LV25700PM
Continued from preceding page.
Parameter
S-meter DC output
Symbol
Conditions
VSMFM-1
No input, pin 44 DC output non-mod
VSMFM-2
10dBμV, pin 44 DC output non-mod
VSMFM-3
30dBμV, pin 44 DC output non-mod,
min
typ
max
0.5
V
1.9
V
4.5
V
0.85
1.8
1.85
Unit
V
S-meter shift-adj
S-meter AC pin DC output
VSMFM-4
50dBμV, pin 44 DC output non-mod
VSMFM-5
80dBμV, pin 44 DC output non-mod
VSMFM-A1
No input, pin 57 DC output non-mod
VSMFM-A2
10dBμV, pin 57 DC output non-mod
VSMFM-A3
30dBμV, pin 57 DC output non-mod
VSMFM-A4
50dBμV, pin 57 DC output non-mod
VSMFM-A5
80dBμV, pin 57 DC output non-mod
S-meter inclination standard - 1
S-curve1
Which was obtained by deducting
S-meter inclination standard - 2
S-curve2
Which was obtained by deducting
3.0
V
0.45
0.63
1.15
1.45
V
V
1.75
2.45
V
V
4.5
V
0.85
1.0
1.4
V
0.8
1.15
1.5
V
0.15
0.3
V
-12
-7
-3
dB
64
69
74
dBμV
80
88
96
dBμ
(VSMFM-2) from VSM (VSMFM-3)
(VSMFM-3) from VSM (VSMFM-4)
Mute drive output
VMUTE-60
Noise convergence - 1
FM NOISE-20
60dBμV, pin 64 output DC output non-mod
60dBμV.98.1MHz, 30%mod,
input reference,
output level of the input -20dBμV,
MUTE = OFF (42pin = GND)
N-AGC ON input
VNAGC
98.1MHz, non-mod, MIX input level at which
pin 13 becomes 0.6V or more
W-AGC ON input
VWAGC
98.1MHz, non-mod,
pin 44 = 0V applied (Keyed on),
MIX input level at which pin 13 becomes 0.6V
or more
Image obstruction ratio
IRR
Removal amount of 108.1M +21.4MHz
40
dB
(when IRR-DAC is used)
SD bandwidth
BW-mute
98.1MHz, non-mod, 60dBμV,
70
100
130
kHz
93
97
101
dBμV
Bandwidth at which SD pin is turned ON
Conversion gain
A.V.
98.1MHz, 60dBμV, non-mod, FECF output
(MIX+1st IF AMP)
[FM IF Filter characteristics] FM IF input
Parameter
IF variable filter gain
Symbol
FIL-Gain
Conditions
10.7MHz, non-mod, 70dBμV,
min
typ
max
Unit
1.9
V
0.3
V
pin 44-S-meter voltage
(FILTER TEST MODE). Narrow-Fix
IF variable filter narrow-band
FIL-BW-N
characteristics
10.7MHz±30kHz, non-mod, 70dBμ
Pin 44 S-meter voltage
(Filter test mode).
Narrow-Fix mode.
Difference from Pin 44 voltage at 10.7 MHz
IF variable filter wide-band
characteristics
FIL-BW-W
10.7MHz±80kHz, non-mod, 70dBμ
0.5
V
Pin 44 S-meter voltage
(Filter test mode).
Wide-Fix mode.
Difference from Pin 44 voltage at 10.7 MHz
No.A1709-6/68
LV25700PM
[NC block] NC input (pin 59), S-meter AC input (pin 57)
Parameter
FM NC gate time
Symbol
FM τGATE
Conditions
NC input, pulse cycle = 1kHz,
min
typ
max
Unit
36
40
44
μs
95
130
165
mVp-o
44pin = 2V applied, pulse width = 1μs,
at 200mVp-o pulse input (after MPX-VCO
adjustment), measurement at pin 24.
FM NC noise sensitivity
SN-DETOUT
NC input (pin 59), 44pin = 2V applied,
measure the pulse input level at which the
noise canceller starts operation,
pulse cycle = 1kHz, pulse width = 1μs
FM NC noise sensitivity
SN-Vsm
90
S-meter (AC) input (pin 57), 44pin = 0V
mVp-o
applied, measure the pulse input level at
which the noise canceller starts operation,
pulse cycle = 1kHz, pulse width = 1μs
AM NC gate time
AM τGATE (1)
S-meter (AC) input (pin 57),
270
390
510
μs
pulse cycle = 1kHz, pulse width = 1μs,
measurement at pin 24. 44pin = 1.5V
AM NC noise sensitivity
SN
S-meter (AC) input (pin 57), measure the
220
mVp-o
pulse input level at which the noise canceller
starts operation, pulse cycle=1kHz,
pulse width=1μs
[Multipath-noise rejection circuit] MRC input (pin 58)
Parameter
Symbol
Conditions
min
typ
max
Unit
MRC output
VMRC
Pin 56 voltage when 3.5 V is applied to V44
2.7
2.95
3.2
V
MRC operation level
MRC-ON
SG (AG5) out level when pin 44 = 3.5V and
110
155
220
mVrms
pin 56 = 2.6V, f = 70kHz
[AM characteristics] AM AMANT input
Parameter
Practical sensitivity
Symbol
Conditions
min
typ
max
Unit
S/N-30
1MHz, 30dBμV, fm = 1kHz, 30%mod, pin 49
20
dB
Detection output
Vo-AM
1MHz, 74dBμV, fm = 1kHz, 30%mod, pin 49
130
180
250
mVrms
AGC-F.O.M
V AGC-FOM
1MHz, 74dBμV, output reference, input width
52
56
60
dB
at which the output decreases by 10dB, pin 49
Signal-to-noise ratio
S/N-AM
1MHz, 74dBμV, fm = 1kHz, 30%mod
Total harmonic distortion ratio - 1
THD-AM-1
1MHz, 74dBμV, fm = 1kHz, 80%mod
51
0.3
60
1
dB
%
Total harmonic distortion ratio - 2
THD-AM-2
1MHz, 120dBμV, fm = 1kHz, 80%mod
0.5
1.5
%
AM HCC output attenuation
AM HCC
1MHz, 74dBμV, fm = 3kHz, 30%mod,
-13
-9
-5
dB
0
0.1
0.5
V
V
V78 = 3V→0.6V, 25 pin
S-meter DC output
S-meter AC output
VSMAMDC-1
No input, 44 pin DC output
VSMAMDC-2
1MHz, 30dBμV, non-mod, 44 pin DC output
0.7
1.3
1.9
VSMAMDC-3
1MHz, 120dBμV, non-mod, 44 pin DC output
2.4
3.0
4.2
V
VSMAMAC-1
1MHz, -20dBμV, fm = 1kHz, 80%mod,
0
0.5
mVrms
90
140
180
mVrms
57 pin DC output
VSMAMAC-2
1MHz, 74dBμV, fm = 1kHz, 80%mod,
57 pin DC output
Wide band AGC sensitivity
W-AGC.AM
1.4MHz, input at V6 = 0.7V
86
92
98
dBμV
SD sensitivity
SD-sen.AM
1MHz, ANT input level at which the SD pin is
25
30
35
dBμV
22
dBμV
turned ON
IF count sensitivity
IF-count-sens. AM
IF count sensitivity, 1MHz, non-mod
No.A1709-7/68
LV25700PM
Pin Function
Pin No.
Function name
Block
Pin No.
Function name
Block
1
MIX-OUT1
FE
41
RDS_LPF
IF
2
RF-VCC_8V
---
42
F2
LOGIC
3
AM-MIX-IN2
AM
43
F1
LOGIC
4
AM-MIX-IN1
AM
44
S-METER
IF
5
AM-RFAGC
AM
45
AFC-OUT.
IF
6
AM-ATT
AM
46
AFC-C
IF
7
FM-RFDAC
FE
47
Noise-AGC
NC
8
AM-IFAGC/FM-RFAGC
AM/FM
48
GND
---
9
FM-ANTDAC
FE
49
MPX Lch-OUT
MPX
10
FM-IN1
PLL
50
MPX Rch-OUT
MPX
11
FM-IN2
PLL
51
CHCC
MPX
12
RF-GND2
PLL
52
MPX_IN
MPX
13
FM-ANT-D
FE
53
NC-MPX-VCC
---
14
VCO-GND
---
54
Phase_dat
MPX
15
OSC-VCC
---
55
Phase_dat
MPX
16
AM/FM-OSC(B)
FE
56
MRC-TIME
MRC
17
AM/FM-OSC(C)
FE
57
VSM-AC
IF
18
SIGNAL QUARITY
IF
58
MRC-IN
MRC
19
VT
PLL
59
NC-IN
NC
20
AM/FM FET
PLL
60
DET-OUT
IF
21
CPAM
PLL
61
VREG49
AM/FM
22
CPFM
PLL
62
AM-IF-IN1
AM
23
FET GND
PLL
63
AM-IF-IN2
AM
24
DC MONITOR
MPX
64
MUTE-CONT
IF
25
F3
LOGIC
65
IFAGC-LPF
FE
26
UL/IFEND/BUSY
LOGIC
66
AM_LC/Pilot-Det.
AM
27
SD_OUT/ST_IND
---
67
Sep.-ADJ
MPX
28
Q_OUT
MPX
68
AM-MIX2
AM
29
RD_DA
LOGIC
69
2nd-MIXIN2
AM
nd
30
RD_CL
LOGIC
70
2 -MIXIN1
AM
31
S_DA
LOGIC
71
Mod.-DET
NC
32
S_CK
LOGIC
72
IF-GND
---
33
RESET
LOGIC
73
1st-IF-OUT
FM
34
BUS(TP34)
LOGIC
74
IF-VCC-5V
---
35
D_VCC_5V
---
75
1st-IF-IN1
FE
36
VREG_3V
---
76
1st-IF-IN2
FE
37
D_GND
---
77
AM-RF-AGC
AM
38
XTAL_OUT
X'tal
78
HCC-CONT
AM/FM
39
XTAL_IN
X'tal
79
RFAGC-IN BYPASS
FE
40
XTAL_GND
---
80
MIX-OUT2
FE
No.A1709-8/68
V.V
51Ω
AM_IN
R80
30Ω
AC3
SG2
50Ω
65pF
30Ω 15pF
L_AM1
6.8μH
C2B
100μF
+
L_AM2
30mH
C2A
22n
1
64
5V
C54
1μF
2
R6
470Ω
R2
680Ω
R6A
10kΩ
C4A
0.22μF
2
1
SW5B
SW5A
5
FM_ATT
DC
RF_DAC
DC
7
5V
FM_IN
50Ω
ANT_DAC
DC
9
IQ_MIX.
LMT
HPF
LPF
C8
0.22μF
SG1
AC1
R8
10kΩ
2 1
56
C56
1μF
MRC
SW5C
8
RF_DAC
B.V._BPF
ATT.
6
58
VSM_AC
57
C57
0.01μF
Q_CONT.
59
C5
0.022μF
AM_ANT_D
DC
R5
100kΩ
C4C
15pF
C4B
36pF
4
FET1
CPM5905
3
C59
1μF
SMETER
IF_LOCAL
AM_DET.
AM_RF_AGC
1:OPEN
2:SHORT
L_AM3
1mH
L_AM4
47μH
C3
0.1μF
61
IF_AMP.
SW3
C60
18000pF
60
C61
0.1μF
SW3 NC IN
62
C63
0.1μF
IF_AGC
63
C6
0.47μF
C58
0.022μF
80
79
78
77
76
75
74
73
72
71
70
69
68
D3
1SV251
MIX_OUT2
RFAGC_IN
_BYPASS
HCC_CONT
AM_RF_
AGC_OUT
1ST_IF_AMP
1ST_IF_IN
IF_VCC_5V
T80
IFT_10.7M
C80
0.022μF
C79
1μF
Va
0.1V, 0.6V, 3V
C77
1μF
C76
0.022μF
C74A
0.022μF
IF_GND
MOD
_INDEX
2ND_MIX
_IN1
2ND_MIX
_IN2
1ST_IF_OUT
C71
1μF
65
C66 AM_RF
1μF _AGC
66
C67 AM_LC
1μF
67
SEPA_ADJ
C65
1μF
C69 AM_MIX2
0.022μF
C78
1μF
AM_RF_AGC
DC
+
CF1
CF_10.7M
C74B
10μF
CF2
CF_10.7M
SW1
T68
IFT_450k
SW2
0.022μF
100Ω
0.022μF
CF3
CF_450k
HCC
DC
51Ω
300Ω
VCC_5V
50Ω
IF_IN
VCC_8V
AC2
SG2
SW1 IF IN
SW2 CF OUT
3
1 U2+
-2
HFA1112
-5V
+5V
CF OUT
AM_IF_IN2
AC
MUTE_CONT
MIX_OUT1
C55
1μF
10
11
D2
1SV251
R13B
330Ω
R13A
1kΩ
C13C
2200pF
FM_ANTD
DC
D1
1SV251
C10B
0.022μF
T10
MIX_IN
13
C13C
2200pF
12
AFC
N_AGC
C10
C10
1000pF 1000pF
R10B
50Ω
+
-
SNC
52
Sepa_adj.
SUB_DEC.
C14
0.22μF
2 1
15
DIV.
State_DET
SD
SW5D
14
49
48
18
R18
33kΩ
C16B
330pF
C18
1μF
C16A
VCD2
2pF
SVC704
C17
3pF
C15
0.022μF
L16
L_OSC
C16
2pF
17
16
RF_LOCAL
P_DEC.
47
C47
0.47μF
AFC_SW
38k<0
S MATRIX
M
P_Cancel
HCC
51
C50
C49
0.015μF 0.015μF
50
C52
C51
0.47μF 2200pF
N_GATE
53
FM_RF_AGC
FM_DET.
Mute
54
N_SENS
R54
3kΩ
C53
0.22μF
C54
0.47μF
55
PD2
SW4
RF_VCC_8V
VREF_4.9V
AM_MIX_IN2
NC_IN
AM_ATT_D
AM_IF_IN1
AM_MIX_IN1
DET_OUT
AM_RFAGC
MRC_IN
RF_DAC
FM_ATT
MRC_TIME
RF_AGC
HCC_C
51Ω
FM_MIX_IN1
BB_VCC
FET_GND2
L_OUT
AC5(PULSE)
f=1kHz
Wide=1μS
ANT_DAC
PD1
FM_MIX_IN2
MPX_IN
FM_ANT_DR
FM_RFAGC/AM_IFAGC
R_OUT
OSC_VCC
BB_GND
19k<0
FE_OSC2
FE_OSC1
VCC_5V
45
AFC_OUT
19
C18
150pF
LPF
20
21
R22
3.3kΩ
22
LOGIC
AC INPUT
AC1 FM IN
AC2 IF IN
AC3 IF IN
AC4 MRC IN
AC5 PULSE IN
C17B
3pF
R21
2.7kΩ
42
41
RDS_LPF
24
DC
26 IF_END
IF_IN
IF_OUT_MONITOR
NC_IN
PULSE_IN
INT_ATT SW
VT
VCC_8V
OSC OUT
AC
DC
DC_MON
DC/FREQ
A_QOUT
F3
IF_END
25 F3
ST_IND
DC
Q_OUT
27 ST_IND
28 Q_OUT
RD_DA
29 RD_DA
S_DA
RD_DL
30 RD_CL
31 S_DA
VCC_3V
VCC_5V
C38B
3pF
S_DL
R30
10kΩ
C35
1μF
C36
10μF
C38
18pF
C39
X1
20.5M 18pF
VSM (DC)
DC
VSM (DC)
DC
VAFC
DC
F2
F1
32 S_CK
33 RESET
R31
10kΩ
CC_5V
34 BUS
35 D_V
36 VREG_3V +
37 D_GND
38 XTAL_OUT
39 XTAL_IN
SW1
SW2
SW3
SW4
SW5A/5B/5C/5D
SW
+5V
3
+
1 51Ω
2 -U1
HFA1112
-5V
C22B
1000pF
C22A
15000pF
23
3kΩ
8V(15pin)
I2C_BUS
R41
3.3kΩ
C41B
68nF
40 XTAL_GND
C41A
3.9nF
XTAL_OSC
RDS_DEC
43
C44
0.22μF
Vc
44
C21
0.22μF
PLL
A/D
D/A
10kΩ
SW
Phase
FF
MPX_PLL
46
C45
0.01μF
R47
1MΩ C45B
0.47μF
L-CH OUT
AC
R-CH OUT
AC
Vsm_AC
DC
Vsm_AC
DC/AC
AFC_C
MRC OUT
VT_LPF
NC_AGC
A_QOUT
DC
VT_COUNT
S_METER
CPAM
AC4
VCC_GND
CPFM
DET_OUT
DC MON
SW4 PG IN
FET_GND
0.1μF
(O)
(O)
(O)
(O)
(O)
(O)
(O)
(I/O)
(I/O)
(I)
(I)
Vb
AC
FREQ
RESET
X'TAL_OUT
Vref 2.7V
AFC
Q_OUT
IF_BW_OUT
SD/ST INJ/MPX VCO
VSM
NC_GATE
C33
0.1μF
R33
10kΩ
+5V
3
+
1 51Ω
2 -U6
HFA1112
-5V
DI (I)
CLK (I)
(I)
LV25700PM
Block Diagram
No.A1709-9/68
8V
5V
C2B
100μF
C74B
10μF
C74A
0.022μF
+
C2A
0.022μF
R80
30Ω
CF1
CF_10.7M
+
CF2
CF_10.7M
T68
IFT_450k
65
IF_GND
74
73
72
71
70
1ST_IF_IN2
77
76
75
1ST_IF_IN1
IF_VCC_5V
1ST_IF_OUT
R71
MOD_DET
2ND_MIXIN1
69
68
C80
0.022μF
T80
IFT_10.7M
80
MIX_OUT2
C78 AM_RF_AGC
1μF
78
HCC_CONT
C79
1μF
79
RFAGC_IN
BYPASS
C77
1μF
C76
0.022μF
C71
1μF
2ND_MIXIN2
C69
0.022μF
AM_MIX2
C66 IFAGC_LPF
1μF
66
AM_LC
C67
1μF PILOT_DET
67
SEPA_ADJ
C65
1μF
1
64
2
R2
680Ω
L_AM3
1mH
L_AM4
47μH
5
AM_ANT
L_AM2
30mH
C5B
0.022μF
C5
0.022μF
C9
D3
1SV251 1000pF
C6
0.022μF
R6
470Ω
8
R7
30kΩ
C7
1000pF
C8
0.22μF
7
RF_DAC
B.V._BPF
ATT.
6
58
57
C57
2200pF
Q_CONT.
59
SMETER
R5
100kΩ
C4C
15pF
C4B
36pF
4
C4A
0.22μF
L_AM1
6.8μH
C59
1μF
IF_LOCAL
AM_RF_AGC
3
60
C60
AM_DET.
IF_AMP.
62
FET1
CPM5905
C3
0.1μF
IF_AGC
63
61
C63 C61
0.1μF 0.1μF
AM_IFIN2
C56
1μF
9
IQ_MIX.
LMT
HPF
LPF
MRC
56
11
FET2
3SK263
C10B
8pF
C10
4pF
C2C
0.022μF
C11C
2pF
R11A
100kμF
13
L8
FM ANT
R11D
100kΩ
C11A
1000pF
51
D4
1SV251
VCD3
FM_ANT
14
49
Sepa_adj.
SUB_DEC.
15
DIV.
C13
0.1μF
R13
330Ω
C19
33kΩ
C16B
27pF
18
GND_RF
FF
VT
19
10kΩ
R21
2.7kΩ
Signal Quality
C19
150pF
21
44
C21
0.22μF
20
PLL
A/D
D/A
LPF
FM_ON
SW
Phase
C18
1μF
45
C44
0.22μF
MPX_PLL
46
C16A
VCD2
4pF
SVC704
C15
0.022μF
L16
L_OSC
C17
3pF
17
RF_LOCAL
P_DEC.
16
C16
2pF
State_DET
SD
48
C45
0.01μF
R47
1MΩ C45B
0.01μF
47
C47
0.47μF
AFC_SW
38k<0
S MATRIX
M
P_Cancel
HCC
C57
1000pF GND_RF
R11B
180Ω
FM_ANT
C11E
4pF
C11D
1000pF
12
AFC
N_AGC
VCD1
FM_RF
C11
4pF
R11C
100kΩ C11B
1000pF
R9A
100kΩ
+
-
SNC
52
50
C51
C52
0.47μF 2200pF
N_GATE
53
FM_RF_AGC
R10A
100Ω
10
R8
220kΩ
R10
30Ω
C10A
100pF
T10
FM_RF
54
N_SENS
R54
3kΩ
FM_DET.
Mute
55
C54
0.47μF
C55
1μF
C50
C49
0.015μF 0.015μF
R_OUT L_OUT
NOISE
AGC
C54
1μF
MUTE_CONT
MIX_OUT1
VREF_4.9V
AM_MIX_IN2
AFC_OUT
CF3
CF_450k
RF_VCC_8V
AM_IFIN1
AM_MIX_IN1
DET_OUT
AM_RFAGC
VSM_AC
AM_IFAGC
FM_RFAGC
NC_IN
AM_ATT
Phase_det
FM_IN1
MRC_IN
FM_RFDAC
MRC_TIME
FM_ANTDAC
NC_MPX_VCC
RF_GND2
L_OUT
OSC1
MPX_IN
FM_ANT_DR
GND
OSC2
HCC_C
VCO_GND
19k<0
R_OUT
OSC_VCC
AFC_C
VT
R22
3.3kΩ
22
F2
42
41
RDS_LPF
C22B
1000pF
C22A
15000pF
23
3kΩ
24
DCMON
8V(15pin)
I2C_BUS
R41
3.3kΩ
C41B
68nF
QOUT
ST/SD
UL
8V
28 Q_OUT
27 ST_OUT
26 UL_IFEND_BUSY
25 F3
F3
RDDA
29 RD_DA
GND
SDA
SCK
RDCL
ST_IND
SDA
30 RD_CL
RESET
5V
SCK
GND
C33
1μF
DGND
S_METER
TP34
31 S_DA
8V
R32
10kΩ
C36B
C38
18pF
C39
18pF
32 S_CK
R31
10kΩ
33 RESET
CC_5V
34 BUS
10μF
C35
1μF
1μF
X1
20.5M
VREG_3V + C36
35 D_V
36
37 D_GND
38 XTAL_OUT
39 XTAL_IN
40 XTAL_GND
C41A
3.9nF
XTAL_OSC
RDS_DEC
43
F1
LOGIC
S_METER
CPAM
5V
CPFM
Phase_det
FM_IN2
G1
FET_GND
C53
0.22μF
G2
DC MONITOR
VSM_AC
connecter C
connecter A
LV25700PM
Performance Emphasis (FM FET specifications)
No.A1709-10/68
LV25700PM
Pin Discription
Pin name
Function
1
MIXER OUT1
80
MIXER OUT1
Discription
Internal Equivalent Circuit
FM/AM MIX OUT (common)
1
80
RF_GND(PIN12)
2
RF VCC
3
AM MIXER input 1
AM MIX IN
VCC = 8V
4
AM MIXER input 2
Input impedance = 10kΩ
RF_VCC(PIN2)
4
3
2.5kΩ
10kΩ
110Ω
110Ω
10kΩ
12kΩ
RF_GND(PIN2)
5
AM RF AGC
RF AGC rectifier capacitor
Determination of distortion ratio during
RF_VCC(PIN2)
low-frequency modulation
1kΩ
Increase C5;
Distortion → improved
1kΩ
AGC_DEC
Response → slow
1kΩ
1kΩ
Decrease C5;
Distortion → worse
Response → quick
6
AM ANT ATT
For pin diode drive
I6 = 8mA
IF_GND(PIN72)
5
IF_GND(PIN72)
RF_VCC(PIN2)
ANT damping current
1kΩ
6
1kΩ
200Ω
IF_GND(PIN72)
Continued on next page.
No.A1709-11/68
LV25700PM
Continued from preceding page.
Pin name
7
Function
FM-RF-DAC
Discription
Internal Equivalent Circuit
FM RF tuning DAC
RF_VCC(PIN2)
0.8mA
7
1kΩ
30kΩ
IF_GND(PIN72)
8
AM IF AGC
IF AGC voltage: DC smoothing capacitor pin
FM RF AGC
RF_VCC(PIN2)
AM_IF_AGC
FM_RF_AGC
FM RF AGC voltage:
Voltage = Hi (around 8V) with AGC OFF.
1kΩ
The voltage lowers when a level is inserted
2kΩ 500Ω
into the AGC circuit. AGC is applied at the
10kΩ
voltage of VCC-Vbe.
1kΩ
36kΩ 1kΩ
500Ω 500Ω
AGC
48kΩ
20kΩ
2kΩ
8
IF_GND(PIN72)
9
FM-ANT-DAC
FM ANT tuning DAC
(IRR-DAC)
Can be used as an IRR-DAC selected with
RF_VCC(PIN2)
a changeover switch.
0.8mA
1kΩ
7
30kΩ
100kΩ
133kΩ
16
IF_GND(PIN72)
10
FM MIXER IN1
11
FM MIXER IN2
FM MIX input
10
11
20Ω 20Ω
20Ω 20Ω
10kΩ 10kΩ
RF_GND(PIN12)
12
RF GND2
(FE, FM, AM)
RF GND
Continued on next page.
No.A1709-12/68
LV25700PM
Continued from preceding page.
Pin name
13
Function
Discription
Antenna Damping
Pin 13: Antenna damping current flows
Drive pin
when the RF AGC voltage becomes VCC-
Internal Equivalent Circuit
RF_VCC(PIN2)
Vbe.
75kΩ
300Ω
13
300Ω
RF_GND(PIN12)
14
VCO_GND
15
OSC VCC
(OSC)
GND
16
OSC1
OSC pin
17
OSC2
VCC = 8V
OSC_VCC(PIN15)
DAC
0.5kΩ
100kΩ
17
0.5kΩ
0.5kΩ
16
IRR_SW
200kΩ
5kΩ
0.8kΩ
5kΩ
RF_GND(PIN12)
18
SIGNAL QUARITY
DC smoothing is performed by the output
(UNDESIRE DET)
impedance and external capacity.
IF_VCC(PIN74)
Note that too large capacity will reduce the
responsiveness of the IF filter as the
0.5kΩ
voltage of this pin is also used to control the
IF filter.
0.5kΩ
18
22kΩ
3mA 1kΩ
33kΩ
IF_GND(PIN72)
Continued on next page.
No.A1709-13/68
LV25700PM
Continued from preceding page.
Discription
LPFD:
20
LPFD
Internal FET drain output pin for PLL
21
CPAM
This pin is combined with CPFM/CPAM pins
22
CPFM
to form a low pass filter for PLL.
23
FET_GND
CPFM, CPAM:
Charge pump output pins
Internal Equivalent Circuit
RF_VCC(PIN2)
3kΩ
FM_ON
1kΩ
These pins are placed in high-impedance
state in BACKUP mode, at power-on-reset
10kΩ
AM_OFF
FM_OFF
time, and in PLL stop state.
100Ω
100Ω
20
PLL_LPF
DC MONITOR
FM_ON
100Ω 100Ω
23
FETOUT
19
24
D_VCC(PIN35)
21
D_GND(PIN37)
22
CPFM
VT
CPAM
Function
19
FETGND
Pin name
Adjustment mode
Internal signal output monitor pin
See BIT specifications.
24
Normal mode:
This pin outputs the SD signal.
25
F3
F3
26
UL/IFEND/BUSY
This pin must be left open.
42
F2
Output port
43
F1
1
2
UL/IFEND/BUSY:
3
26
2
1
These pin generates the signal that
identifies the Radio PLL-Unlock, IF count
end, or I2C BUS Busy state.
UL/IFEND/BUSY, F3 pin
F1, F2
These pins must be left open.
Default pull-down ON.
3
25
2
3
2
1
D_GND (PIN37)
F1, F2 pin
27
SD_OUT/ST_IND
SD_OUT/ST_IND
28
Q_OUT
SD, ST_IND signal output pin
31
S_DA
QOUT
32
S_CK
Quality-out signal output pin
3
27
2
1
SDA, SCK
I2C interface pins.
Both are of open drain type.
External pull-up resistors are needed.
SD_OUT/ST_IND,Q_OUT pin
Use the same power supply for the pull-up
resistors and Pin 34 BUS.
These pins are set to an input port at
RESET time.
31
1
2
1
2
D_GND (PIN37)
S_DA,S_CK pin
Continued on next page.
No.A1709-14/68
LV25700PM
Continued from preceding page.
Pin name
Function
Discription
29
RD_DA
RDS demodulator signal output pins
30
RD_CL
Output Low when the RDF is OFF.
Internal Equivalent Circuit
3
29
2
1
RD_DA,RD_CL pin
33
RESET
System reset pin
A low-level to this pin resets the system and
PC starts executing the program from
address 0. When power is turned on, it is
1
33
necessary to apply low-level to this pin for
2
50ms or more after the 8V/5V power supply
is stabilized (leaving this pin open is
inhibited).
See the RESET timing diagrams.
34
BUS
Power/GND pins
35
D_VCC_5V
D_GND
• BUS: Power supply for the main
37
microcontroller interface pins.
• DVCC5V, GDND: Main operating power
supply
36
VREG_3V
Internal operating low-voltage output pin
Connect a bypass capacitor to this pin.
3
2
36
+
10μF
D_GND(PIN37)
38
XTAL_OUT
Pins connected to the 20.5MHz oscillating
39
XTAL_IN
element
40
XTAL_GND
1
39
XTAL_GND: X'tal oscillator circuit GND
2
20.5MHz
38
40
XTALGND(PIN40)
41
RDS_LPF
Low pass filter for RDS VCO
Used to form an external low pass filter
D_VCC_5V(PIN35)
3.3kΩ
41
3.9nF
D_GND(PIN37)
44
AM/FM
Current drive type S-meter output
S_METER (DC)
IF_VCC(PIN74)
68nF
D_GND(PIN37)
RF_VCC(PIN2)
Pin 44: Eliminates the AC component by
external capacity.
AM Vsm
(DC)
Pin 57: Leaves the AC components
(Pin for NC noise extraction and for
neighboring interfering noise extraction)
FM Vsm(AC)
FM Vsm(CC)
AM Vsm(AC)
300Ω 333Ω
4kΩ
2kΩ
5.3kΩ
57
Vsm(F11)
(DC)
15kΩ
4kΩ
IF_GND(PIN72)
44
Continued on next page.
No.A1709-15/68
LV25700PM
Continued from preceding page.
Pin name
45
Function
AFC_OUT
Discription
Internal Equivalent Circuit
Null voltage
IF_VCC(PIN74)
As compared with internal 2.7V regulator.
2.7V+Vloe
1kΩ
1kΩ
1kΩ
500Ω
IF_GND(PIN72) 10kΩ
1kΩ
1kΩ
20kΩ
45
1kΩ
1kΩ
1kΩ
IF_GND(PIN72)
IF_GND(PIN72)
IF_GND(PIN72) IF_GND(PIN72)
46
AFC_C
At reception SW-ON
46
Shorts between pin 45 and AFC capacity.
(series, small capacity shorted)
1kΩ
At RDS SW-OFF
SW
Opens between pin 45 and AFC capacity.
(series, small capacity + large capacity
configuration)
IF_GND(PIN72)
47
NOISE AGC
BB_VCC(PIN53)
MOS: NCAGCO
5kΩ
47
1kΩ
10kΩ
BB_GND(PIN48)
48
GND
(NC, MPX, MRC)
49
MPX output (LEFT)
MPX outputs
50
MPX output
Impedance changed over with the de-
(RIGHT)
emphasis changeover.
GND
RF_VCC(PIN2)
Low = 3.3kΩ
335Ω 335Ω 335Ω 335Ω
High = 5.0kΩ
(50/75μs changeover with the external
capacity of 0.015μs)
500Ω 500Ω
49 L
50 R
72Ω 72Ω
5kΩ 5kΩ
GND(PIN48)
Continued on next page.
No.A1709-16/68
LV25700PM
Continued from preceding page.
Pin name
51
Function
HCC capacitor pin
Discription
Internal Equivalent Circuit
With pin 51 external capacity and internal
RF_VCC(PIN2)
resistor R, high-cut frequency
characteristics are set.
Internal resistance can be changed over
R
with 3 bits (10kΩ, 30kΩ, 50kΩ, 70kΩ, 90kΩ,
10kΩ
110kΩ, 130kΩ, 150kΩ) (HCC cut off)
51
1kΩ
GND(PIN48)
52
MPX PLL input
LPF formed with internal resistance 30kΩ
BB_VCC(PIN53)
and pin 34 eternal capacity
↓
HPF formed by subtracting the above LPS
52
passage signal from the Composite signal.
↓
1kΩ
Supply to MPX PLL circuit
30kΩ
1kΩ
BB_GND(PIN48)
53
NC MPX VCC
54
Phase-Comparator
55
for MPX
(NC, MPX, MRC)
VCC = 5V
BB_VCC(PIN53)
10kΩ
13kΩ 13kΩ
10kΩ
54
55
500Ω
500Ω
BB_GND(PIN48)
56
MRC TIME
The time constant for the Multipath-Noise
Detector is determined with the following:
100Ω resistor and external capacity during
discharge
IConstant and external capacity during
charge.
IConstant can be changed over with 2bits
RF_VCC(PIN2)
Iconst
56
500Ω
500Ω
100Ω
(MRC time constant).
20kΩ
20S
BB_GND(PIN48)
Continued on next page.
No.A1709-17/68
LV25700PM
Continued from preceding page.
Pin name
Function
57
Vsm AC
58
MRC input
Discription
Internal Equivalent Circuit
C57
RF_VCC(PIN2)
IF_VCC(PIN74)
57
58
5.3kΩ
68kΩ
1kΩ
30pF
1kΩ
30kΩ
30kΩ
IF_GND(PIN72)
59
Noise canceller
Noise Canceller Input
input
Input impedance
BB_GND(PIN48)
BB_VCC(PIN53)
50kΩ
15pF
59
1kΩ
51kΩ
50kΩ
NC-BIAS
BB_GND(PIN48)
60
FM/AM DET OUT
AM/FM detection output
Output impedance
Low impedance in the FM mode
RF_VCC(PIN2)
100Ω
12kΩ in the AM mode
FM OUT
100Ω
AM OUT
100Ω
12kΩ
28kΩ
300Ω 300Ω
100Ω
60
IF_GND(PIN72)
Continued on next page.
No.A1709-18/68
LV25700PM
Continued from preceding page.
Pin name
61
Function
VREF 4.9V
Discription
Internal Equivalent Circuit
Reference voltage
RF_VCC(PIN2)
1kΩ
4.9V+Vbe
1kΩ
61
77kΩ
26kΩ
IF_GND(PIN72)
62
AM IF AMP input1
AM 450kHz AMP input
63
AM IF AMP input2
Input impedance = 2kΩ
62
2.5kΩ
10kΩ
63
10kΩ
1kΩ
IF_GND(PIN72)
64
MUTE CONT
Noise convergence adjustment
Mute
AMP
Mute OFF function
MUTE is turned OFF when pin 64 is shortcircuited with GND.
LOGIC
D/A
500Ω
BB_GND(PIN48)
64
65
IF AGC LPF
Time constant changeover at Seek
switch diode
10Ω
100Ω
65
100Ω
66
Frequency characteristics of unnecessary
voice band of 100Hz or less is changed to
produce the clear sound in the AM mode.
RF_VCC(PIN2)
400Ω
1kΩ
1kΩ
1kΩ
1kΩ
10kΩ
66
IF_GND(PIN72)
Continued on next page.
No.A1709-19/68
LV25700PM
Continued from preceding page.
Pin name
67
Function
SEPA ADJ
Discription
Internal Equivalent Circuit
The input level of sub-decoder is varied
SUB
through BIT control.
(The output level of MONO and MAIN
SUB BIAS
14kΩ
13kΩ
remains unchanged.)
(Separation Control)
1kΩ
500Ω
500Ω
67
BB_GND(PIN48)
68
nd
AM 2 MIXER
The mixer coil connected to the pin 68
output
mixer output must be wired to VCC = 8V.
RF_VCC(PIN2)
68
100Ω
OSC
69
70
FM 2nd MIXER input1
nd
FM 2 MIXER input2
FM 2nd MIXER
10.7MHz → 450kHz
69
100Ω
100Ω
FM AMP (10.7MHz)
AMP for S-meter voltage
70
167Ω 167Ω
AM MIXER input
AMP for AM Noise AGC pickup
500Ω
300Ω
500Ω
500Ω
600Ω 600Ω
IF_GND(PIN72)
71
Modulation INDEX
Set the detection output level as DC output.
BB_VCC(PIN53)
C71 is the smoothing capacitor.
500Ω
1kΩ
800Ω
71
150Ω
33kΩ
170kΩ
BB_GND(PIN48)
72
IF GND
(IF)
IF GND
Continued on next page.
No.A1709-20/68
LV25700PM
Continued from preceding page.
Pin name
73
Function
AM/FM 1st IF
Discription
Internal Equivalent Circuit
Output impedance = 330Ω
RF_VCC(PIN2)
MIXER AMP output
50Ω
73
300Ω
RF_GND(PIN12)
74
IF VCC
(IF)
75
AM/FM 1st IF MIXER
AM/FM 450kHz AMP
VCC = 5V
76
AMP input
Input impedance = 330Ω
75
76
300Ω
300Ω 300Ω
IF_GND(PIN12)
77
AM RF AGC
RF AGC rectifier capacitor
RF_VCC(PIN2)
Determination of the distortion ratio during
low-frequency modulation
Increase C77:
Distortion → improved
Response → slow
800kΩ
1kΩ
1kΩ
Decrease C77:
Distortion → worse
Response → quick
1kΩ
* Same as pin 79.
77
IF_GND(PIN72)
78
HCC control input pin
With the Pin 78 input voltage, attenuation of
RF_VCC(PIN2)
the high pass component is controlled.
↓
At weak input, high pass is cut to reduce
the noise feeling.
• Same control for FM/AM HCC.
50kΩ
• The f-characteristics are set by changing
over the external capacity (Pin 51) and
1kΩ
internal resistor.
• Threshold can be controlled with 5 bits.
(FM/AM HCC DAC).
BB_GND(PIN48)
50kΩ
78
79
AM RF AGC
RF AGC rectifier capacitor
BYPASS
Determination of the distortion ratio during
BB_GND(PIN48)
low-frequency modulation
Increase C77:
Distortion → improved
30kΩ
1kΩ
Response → slow
Decrease C77:
Distortion → worse
Response → quick
IF_GND(PIN72)
79
* Same as pin 77.
80
MIXER OUT2
* See pin 1 description.
No.A1709-21/68
LV25700PM
FM/AM level Diagram
FM FE
RF AGC
• Narrow AGC pick up
RF
AGC
N
AGC
MIX OUT(4bit adj)
W
AGC
Keyed
AGC
VCA
• Wide AGC pick up
VCA
MIX IN (10,11pin)(4bit adj)
CF75
CF_10.7M
• Keyed AGC
Controls narrow and wide AGC (4-bit adjustment)
C10
4pF
C11
4pF
VCD1
FM_RF
R7
30kΩ
14
using the S-meter (Pin 44).
MIX
Image rejection Mixer(4bit adj)
R11A
100kΩ
C10B
8pF
T10
FM_RF
C10A
1000pF
R11B
180Ω
FET2
3SK263
R10
30Ω
G2
G1
C7
1000pF
13
VCO_GND
R10A
100Ω
12
PM_ANT_D
11
PM_IN2
10
RF_GND2
C80
0.022μF
C8
0.22μF
9
FM_IN1
T80
IFT_10.7M
8
FM_ANTDAC
R80
30Ω
7
AM_IFAGC
FM_RFAGC
1
FM_RFDAC
80
MIX_OUT1
MIX_OUT2
8V
R8
220kΩ
C57
1000pF
1st IF (10.7MHz)
GND_RF
C11A
1000pF
R11C
100kΩ C11B
1000pF
R11D
100kΩ
VCD3
FM_ANT
R9A
30kΩ
R13
330Ω
C11C
2pF
C9
1000pF
C2C
0.022μF
C11D
1000pF
L8
FM ANT
C13
0.1μF
D4
1SV251
C11E
4pF
GND_RF
FM_ANT
FM IF
• S-meter (10.7MHz)
10.7MHz
• 2nd IF (450kHz)
• BPF (40kHz to 180kHz automatic control)
75
73
Detection path
70
MIX2
BPF
60
DET
DET OUT
10.25MHz
59
level
meter
NC IN
55 Q_CONT
SOFT
CONTROL
for
SD/SNC/HCC
/Keyed
for
MRC/NC/
64 MUTE_COUNT
D/A
S-meter
D/A
BPF
→ S-meter sub/Det out/AFC modulation index
• S-meter for BPF (dedicated to filter adjustment)
1st IF
• IF count freq (10.7MHz)
• IF Limiter AMP
• Band SD
• Soft Mute
• RDS Decoder
FM/AM
SD
MOD
AFC
PLL
U.DET
S-meter
SA13:D7
FIL_VSMON
RDS
DEMOD
IF count
41 RDS_LPF
30 RD_CL
29 RD_DA
HPF
SA10:D3 SA12:D7-4
HPF_FC
SIG_Q
57
S-meter(sub)
44
S-meter
No.A1709-22/68
LV25700PM
FM IF Filter (BPF)
1. Detection
The following types of detection are performed, and when there is a response to any detection, the IF filter bandwidth
is reduced.
When there is no response, the bandwidth remains wide. (-3dB BW: 40 to 180kHz)
(1) Modulation index detection: Detects the modulation index of the FM DET OUT block
(2) Neighboring interference detection: Detects neighboring interference
(3) AFC detection: Detects the AFC voltage of the FM DET block
2. Control
The sensitivity of each of the above detection functions is adjusted by BIT. Control is self-contained within AKAGI.
The control voltage is generated from neighboring interference detection, modulation index detection, and AFC
detection.
Thus, ultimately the IF filter band is adjusted using a single control voltage.
This control voltage varies only the IF filter band.
The control voltage can be fixed from the main microcontroller, so the 40 to 180kHz band can also be adjusted by
main microcontroller control. (Fine adjustment is possible in approximately 50 steps.)
(1) IF filter modulation index detection
Detection output: Detects the audio signal level from NCIN (Pin 59)
LPF fc = 70kHz (1st order). The low pass filter is fixed inside the IC.
IC internal control is performed so that the modulation index detection function operates at a certain electric field
strength or less. (The electric field threshold value can be changed by BIT.)
When modulation index detection operates, the IF filter bandwidth is reduced.
The modulation index detection function does not perform control to widen the IF filter bandwidth.
IF1=10.7MHz
IF2=450kHz
75
73
70
MIX2
BPF
1st IF
DET
Control voltage
10.25MHz
Smeter
Modulation
index
detection
Noise Cancellar
Multiplex
+
-
10kΩ
DC
SELCT
27
fc=100k*3
59
NC IN
HPF=100k*4
LPF =100k*1
SD
ST
SD/ST-IND
DET OUT
AFC
Filter
Neighboring Control
interference
detection
60
24
DC MONITOR
18
Signal Quality
150Ω
fc=70k*1
28
Q-OUT
71
MOD_DET
1μF
No.A1709-23/68
LV25700PM
(2) IF filter neighboring interference detection
There are two detection block systems. The S-meter AC component is detected in the weak electric field (S-meter
voltage = 2V or less), and neighboring interference is detected from DET OUT in the medium electric field or more
(S-meter voltage = 2V or more).
The detection path is changed inside the IC according to the electric field.
S-meter AC component detection only or DETOUT block detection path only can also be changed by BIT at all
electric fields.
The BPF consists of a HPF with fc = 100kHz (4th order) and an LPF with fc = 100kHz (1st order). The HPF can be
selected from 50 or 100kHz, and the LPF fc can be lowered by adding a capacity to the S-meter AC (Pin 57).
IF1=10.7MHz
IF2=450kHz
75
73
70
MIX2
BPF
1st IF
DET
Control voltage
10.25MHz
Neighboring Filter
Control
interference
detection
Smeter
DET OUT
fc=100k*3
AFC
Modulation
index
detection
Noise Cancellar
Multiplex
59
NC IN
HPF=100k*4
LPF =100k*1
SD
ST
27
+
-
10kΩ
DC
SELCT
SD/ST-IND
60
24
18
DC MONITOR
150Ω
fc=70k*1
28
Signal Quality
71
Q-OUT
MOD_DET
1μF
(3) IF filter AFC detection
The IF filter band is controlled by changing the AFC voltage (Pin 45).
The AFC voltage is generated by converting the frequency offset relative to the IF frequency (450kHz) to a voltage.
Neighboring interference detection responds even when the desired signal and the interference signal are the same
level, but AFC detection responds when the interference signal level is higher than that of the desired signal.
Therefore, AFC detection is used in an auxiliary manner for portions that cannot be detected by the neighboring
interference detection path.
IF1=10.7MHz
IF2=450kHz
75
73
70
MIX2
BPF
1st IF
DET
Control voltage
10.25MHz
Smeter
Modulation
index
detection
Noise Cancellar
Multiplex
+
-
10kΩ
DC
SELCT
27
fc=100k*3
59
NC IN
HPF=100k*4
LPF =100k*1
SD
ST
SD/ST-IND
DET OUT
AFC
Filter
Neighboring Control
interference
detection
60
24
DC MONITOR
18
Signal Quality
150Ω
fc=70k*1
28
Q-OUT
71
MOD_DET
1μF
No.A1709-24/68
LV25700PM
Signal Quality
Signal quality uses the same path as neighboring interference detection. (The path can be changed by BIT.)
• Detection block (Smeter_AC/DETOUT) switching inside the IC according to the electric field
• Smeter_AC detection fixed at all electric fields
• DETOUT detection fixed at all electric fields
There are two output systems as follows:
• The neighboring interference detection voltage is compared by the comparator to generate the quality output
(Q-OUT: Pin 28).
• The neighboring interference detection voltage is output in a linear manner (Signal Quality: Pin 18).
Signal Quality (Pin 18) performs DC smoothing using the output impedance (1kΩ) and an external capacity.
This pin voltage is also used to control the IF filter, so care must be taken as the IF filter response will become slow if
the capacitance value is too large.
The S-meter path performs detection from before the BPF (IF filter), so there is no difference in the quality output due
to filter band fluctuation.
The DET OUT (Pin 59) path performs detection from after the BPF (IF filter), so filter band fluctuation produces a
difference in the quality output.
(The multipath signal is detected by Smeter_AC, so differences do not easily occur in Q-OUT.)
IF1=10.7MHz
IF2=450kHz
75
73
70
MIX2
BPF
1st IF
DET
Control voltage
10.25MHz
Filter
Neighboring Control
interference
detection
Smeter
fc=100k*3
AFC
Modulation
index
detection
Noise Cancellar
Multiplex
+
-
10kΩ
DC
SELCT
27
DET OUT
59
NC IN
HPF=100k*4
LPF =100k*1
SD
ST
SD/ST-IND
60
24
DC MONITOR
18
Signal Quality
150Ω
fc=70k*1
28
Q-OUT
71
MOD_DET
1μF
No.A1709-25/68
LV25700PM
AM FE
1. AM RF AGC
The AM RF AGC system comprises two systems: N-AGC and W-AGC.
Narrow AGC: Picks up from the 2nd MIX input.
The band to which AGC is applied is determined by the bands of the two front-end ceramic filters.
Wide AGC: Picks up from the RF block, so AGC is applied to a wide bandwidth.
VCA
C77
1μF
77
W
AGC
AM_RF_AGC
C75
CF_10.7M
AM RF AGC band characteristics
(reference characteristics)
N
AGC
RF
AGC
10.7MHz
C78
1μF
HCC_CONT
C79
1μF
RFAGC_IN
BYPASS
78
VCA
79
AGC ANT LEVEL vs. delta FREQUENCY
center frequency = 1MHz
MIX_OUT2 80
12
AGC on level, dBμV
6
RF_GND2
5
AM_ATT
C3
0.1μF
4
AM_RFAGC
C80
0.022μF
3
AM_MIX_IN2
T80
IFT_10.7M
2
AM_MIX_IN1
R80
30Ω
MIX_OUT1
100
1
RF_VCC_8V
8V
C4A
0.22μF
C4B
36pF
L_AM4
47μF
C4C
15pF
Wide AGC
90
85
Band:
Determined by
the ceramic
filter bands.
Narrowe AGC
80
75
70
--500 --400 --300 --200 --100
R6
470Ω
L_AM3
1m
95
R2
680Ω
0
100
200
300
400
500
delta frequency, kHz
D
C6
0.022μF
FET1
CPM5905
R5
100kΩ
C5B
0.022μF
L_AM1
6.8μF
L_AM2
30m
D3
15SV251
GND_RF
RF_VCC(PIN2)
AM_RF_IN
100Ω
2. AM high band cut and detection output level adjustment method
The pin 60 AM and FM tuner output has an impedance of
12kΩ in AM mode and a hundred and several tens of ohms
in FM mode.
The high band is pre-adjusted by the internal low pass filter
(550kΩ/80pF)) and the AM detection output level is preadjusted by the internal resistor (voltage-divided by 28kΩ).
To further lower the AM band, frequency characteristics can
be adjusted with capacitor C60. To lower the AM detection
output level, the level can be adjusted with resistor R60.
* The high band and the output level cannot be raised from
the initial status.
3. AM low band cut adjustment method
The AM low band frequency characteristics can be adjusted
with capacitor C66, which is inserted between pin 66 and
GND.
Fc = 1/[2π × 1kΩ × C56]
* In FM mode this is shared with PILOT DET, so a
capacitance value less than 0.47μF cannot be set.
FM OUT
100Ω
AM OUT
550kΩ
100Ω
12kΩ
28kΩ
80pF
300Ω 300Ω
100Ω
IF_GND(PIN72)
60
R60
AM DET
IF AMP
C60
AM_LC_AMP
1kΩ 1kΩ 3
DET OUT
+ 1 550kΩ
60
21kΩ 1kΩ
80pF
AM LC
66
C66
PILOT DET
1.4kΩ
SEEK_ON
10Ω 100Ω
IF AGC
1 +3
- 2
IF AGC_LPF
65
C65
100Ω
1kΩ
No.A1709-26/68
LV25700PM
AM IF AGC
The AM IF AGC gain is controlled by the Pin 44 DC voltage.
IF AGC time constant switching circuit
This circuit prevents the system from erroneously stopping (or passing through) caused by S-meter oscillation due
to transient response of IF AGC (2nd order filter) in seek mode.
Reception mode: 2nd order filter consisting of C at Pin 65 and Pin 66.
Seek mode: The internal transistor turns ON and a first order filter is formed by 110Ω and C65.
AM S-meter
The AM S-meter has two systems: AC and DC.
S-meter (AC): Picks up from the 10.7MHz path. The band is determined by the ceramic filter, and the S-meter is
used as AM NC pulse detection. The output is Pin 57, and the AC component is determined by the
external capacity value.
(In FM mode, S-meter operates linked to the FM NC, MRC and neighboring interference (IF filter).
S-meter (DC): Picks up from the 450kHz path. The band is determined by the 450kHz ceramic filter, and the Smeter is used for AM SD and AM HCC. The output is Pin 44, and the signal is converted to a DC
voltage according to the external capacity value.
(In FM mode, S-meter operates linked to the FM SD, FM SNC, FM HCC and FM mute.)
10.7MHz
AM_LC
73
70
1st IF
VCA
W
AGC
RF
AGC
N
AGC
10.7MHz
5 6
AM_RFAGC AM_ATT
MIX2
68
62
DET
SA15
AM IF GAIN
10.25MHz
SA22
FM IF SGAIN
SA11
VSM SHIFT
60 DET OUT
IF
AGC
65 LPF
8 IF AGC
AM
S-meter
S-meter
57
S-meter(sub)
66
IF AGC AMP
AM_OFF
70
SA21
AM VSM SHIFT
AM ON
44
S-meter
The S-meter (AC) can be adjusted by S-meter Shift. At input levels above 20dBμ the gain is lowered by a limiter
amplifier to prevent AM NC detection errors. The recommended setting is 29.
No.A1709-27/68
LV25700PM
Mixer/VCO/PLL
• VCO (twofold oscillation/150MHz to
Program Counter
AM
1/4,1/6
1/8,1/10
VCC8V
MIX_OUT2
1/1
1/2,1/3
39
260MHz)
38
Oscillation driven by the external inductor
Charge
Pump
1/2
FM
X'tal
OSC
Phase
Detecter
3kΩ
90°
Reference Counter
and varactor diode
• Frequency division
10kΩ
AM_OFF
FM Weather (1/1)
OSC
23
C17
3pF
100Ω
20
21
100Ω
22
C21
0.22μF
FM USA/Eur (1/2)
C16A
4pF VCD2
SVC704
AM (1/8, 1/12, 1/16, 1/20)
C22
0.015μF
C16B
27pF
R18
33kΩ
FM Japan (1/3)
CPFM
19
FETGND
C16
2pF
L16
L_OSC
17
VT
16
OSC2
11
OSC1
10
FM_MIX_IN2FM_MIX_IN2
12
FM_MIX_IN1FM_MIX_IN1
RF_VCC_8V
C3
0.1μF
4
RF_GND
MIX_OUT1
3
AM_MIX_IN2
2
AM_MIX_IN1
1
100Ω
CPAM
100Ω
1
C22B
1000pF
R21
2.7kΩ
C18
150pF
R22
3.3kΩ
FM OSC Frequencies vs. Frequency Division Ratios
Destination
RF Frequency Range
Channel Step
Reference Frequency
(kHz)
(kHz)
(kHz)
Frequency Division Ratio
USA
87.9 to 108.1
200
100
2
EUROPE
87.5 to 108.0
50
100
2
EAST EUROPE
64 to 74
10
10
3
JAPAN
76 to 90
100
100
3
Weather Band
162.4 to 162.55
25
25
1
RF Frequency Range
Channel Step
Reference Frequency
Frequency Division Ratio
(kHz)
(kHz)
(kHz)
520 to 1710
10
10
AM OSC
MW
USA
20
(AM/FM: 1/2 × AM: 1/10)
EUROPE
522 to 1611
9
10
20
(AM/FM: 1/2 × AM: 1/10)
JAPAN
522 to 1629
9
10
20
(AM/FM: 1/2 × AM: 1/10)
LW
EUROPE
RF Frequency Range
Channel Step
Reference Frequency
(kHz)
(kHz)
(kHz)
146 to 281
1
10
Frequency Division Ratio
20
(AM/FM: 1/2 × AM: 1/10)
SW
SW1
RF Frequency Range
Channel Step
Reference Frequency
(kHz)
(kHz)
(kHz)
2.28 to 6.23
5
5
Frequency Division Ratio
12
(AM/FM: 1/2 × AM: 1/6)
SW2
7.1 to 10.5
5
5
12
(AM/FM: 1/2 × AM: 1/6)
SW3
10.55 to 18
5
5
12
(AM/FM: 1/2 × AM: 1/4)
* The setting of the frequency division ratio may differ due to the varactor and coil used in OSC.
No.A1709-28/68
LV25700PM
FM Noise cancellar
FM noise canceller detection is performed using two systems (Pin 57 (S-meter AC), Pin 59 (NC IN)) as a
countermeasure against operation errors due to the weak electric field NC sensitivity setting. The detection path is
switched according to the electric field by the S-meter (DC) (Pin 44). FM NC operation can be monitored by the Pin
24 trigger out.
Electric field strength (weak to medium)
ON
OFF
Pin 57 (S-meter AC) detection:
Pin 59 (CN IN):
Medium to strong
ON
ON
C48
1μF
59
NC_IN
Zin=50k
24
LPF
(for signal delay)
COPM
+
-
HPF
(CR, primary)
Pilot-Cancel
(from MPX block)
HPF
(CR, primary)
6kΩ
fc=100kHz
Noise
AMP
COPM
+
-
Noise
Det
Gate time
control (AM)
SA24
FORCENOAGC SA19
AM NC STOP
SA19
Noise_Sens_MAIN
SA10
AC Smeter SW
27kΩ
44
S-Meter
COPM
+
-
Noise
AGC
60kΩ
NC
STOP
NC_HOLD
Gate time
control (FM)
ATT
27kΩ
DCMoni
BUFF
BUFF
Vsm
Current output
TO MPX
57
+
MIX2
10.7M
Limmit AMP
60
FM/AM
DET
-
DETOUT
10.7M
CF
SA20
AM NC Gate Time
47
Noise AGC
AC S-Meter
Description of FM NC functions
SA : D
Recommended Setting
Description of Functions
SA24
Nose-AGC Th.
[1]Force
0: Fixes the noise detection sensitivity.
D2
Forced noise AGC
Noise AGC
1: Uses noise AGC in the forcibly applied state.
SA18
Noise-Sens.
[0]
The noise detection sensitivity is adjusted by switching the noise amplifier output
D6-D7
NC load switching
15kΩ
load.
SA10
AC S-Meter
[0]
Reduces the AC-S-meter internal load resistance value by approximately half.
D1
NC sensitivity switching
54kΩ
(54kΩ//60kΩ → 27kΩ//60kΩ)
The noise detection sensitivity can be adjusted by DAC (SA09, D0 to D4) control.
(Fixed to normal)
0: Normal (Internal load = 54kΩ//60kΩ)
1: ON (Internal load = 27kΩ//60kΩ)
However, note that in FM mode the MRC and IF filter also operate by detecting
the AC component of the same pin (AC_Vsm), so these functions are affected by
this bit.
SA09
NC SENS MAIN
[18]
D0-D4
Adjusting the NC noise
This is valid only in reception mode.
However, it is invalid when SA24 D2 is set to OFF (normal).
detection sensitivity
When SA24 D2 is ON
Increasing the DAC setting increases the comparator threshold voltage, and
worsens the noise detection sensitivity.
Conversely, reducing the DAC setting enhances the detection sensitivity.
(However, reducing the DAC setting by too much increases the chances of
operation errors.)
No.A1709-29/68
LV25700PM
AM NC block
This block detects noise from the 10.7 MHz CF out, turns OFF the AM demodulated signal waveform only during the
period affected by noise, and holds the DC. The detection path is the one system of Pin 40 (S-meter AC). AM NC
operation can be monitored by the Pin 24 trigger out. The Pin 47 external constant is determined by the FM NC with
priority.
SA:D
Recommended Setting
Description of Functions
SA24
Nose-AGC Th.
[1]Force
0: Fixes the noise detection sensitivity.
D2
Forced noise AGC
Noise AGC
1: Uses noise AGC in the forcibly applied state.
SA22
FIFGAIN
[9]
The noise detection sensitivity can be adjusted by DAC (SA09, D0 to D4) control.
D4-D7
Sets the IF limiter amplifier gain.
Increasing the DAC setting increases the gain.
Reducing the DAC setting reduces the gain.
SA11
S-meter Shift
[29]
D0-D4
Hides the noise detected by VsmAC.
Increasing the DAC setting increases the shift amount.
Reducing the DAC setting reduces the shift amount.
Reducing the shift amount enhances the effects during weak input, but also
increases the chances of operation errors due to weak input noise.
SA10
AC S-Meter
[1]
Reduces the AC-S-meter internal load resistance value by approximately half.
D1
NC sensitivity switching
27kΩ
(54kΩ//60kΩ → 27kΩ//60kΩ)
0: Normal (Internal load = 54kΩ//60kΩ)
1: ON (Internal load = 27kΩ//60kΩ)
However, note that in FM mode the MRC and IF filter also operate by detecting the
AC component of the same pin (AC_Vsm), so these functions are affected by this
bit.
SA18
Noise-Sens.
[2]
The noise detection sensitivity is adjusted by switching the noise amplifier output
D6-D7
NC load switching
6kΩ
load.
SA09
NC SENS MAIN
[15]
This is valid only in reception mode.
D0-D4
Adjusts the NC noise
However, it is invalid when SA24 D2 is set to OFF (normal).
detection sensitivity
When SA24 D2 is ON
Increasing the DAC setting increases the comparator threshold voltage, and
worsens the noise detection sensitivity.
Conversely, reducing the DAC setting enhances the detection sensitivity.
(However, reducing the DAC setting by too much increases the chances of
operation errors.)
SA19
AM NC STOP
[31]
Can be set to operate only at weak input (forced OFF at strong input).
Increasing the DAC setting → Operates up to strong input.
D0-D4
Reducing the DAC setting → Operates only at weak input.
SA20
AM NC gate
D2-D7
SA24
D6
AM NC OFF
[12]
Can set the gate time.
430μsec
Increasing the DAC setting shortens the gate time.
(Reference value)
Reducing the DAC setting lengthens the gate time.
[0]
Can forcibly set AM NC to OFF.
0 = ON → Normal operation
1 = OFF → Forcibly OFF
* AM NC ON/OFF can be set by the DAC [AM NC OFF].
* The NC sensitivity coarse adjustment can be set by the DAC [AC_Smeter Sw] and the DAC [Noise-Sens].
* The NC sensitivity fine adjustment can be set by the DAC [NC SENS MAIN], the DAC [S-Meter Shift] and the DAC
[FM IF GAIN].
* The gate time can be set by the DAC [AM NC gate].
The ANT-IB-LEVEL range at which AM NC turns ON can be set by the DAC [AM NC stop].
(AM NC can be turned OFF at medium and strong input.)
No.A1709-30/68
LV25700PM
Stereo Decoder
60
CHCC
60
SEPARATION
60
from NC
LPF
SA47
HCC_SW
MAIN
HC
SEP
Adj
SUB MAT 50μF
75μF
DEC RIX SW
from NC
HCC SNC
SA26
HCC_DAC
FF
38k<90
SA25
SNC_DAC
SA25
SNC SLOPE
SA:D
SA18
78
HCC_CONT
L_OUT
49
50
TO NC
R_OUT
Recommended Setting
MPV VCO
FM:*
D0-D5
SA26
MO_ST_SW
SA24
ST_SENS_ADJ
SA17
PICAN
FF
50kΩ
44
DC-Monitor
24
PILOT
CANCEL
FF
76k<90
80kΩ
55
Phase comp
PILOT_DET
66
FF
38k<0
MRC
S-meter
DCMoni
PILOT
DET
50kΩ
10kΩ
SA18
MPXVCO
MPX
VCO
FF
19k<0
SA26
DEEMPSW
Phase comp
54
PHASE
COMP
FF
19k<90
SA17
SEPD
Smeter
MPX_IN
Description of Functions
Optimum value: Set so that the free-running frequency (VCO frequency under nomodulation conditions) is near 304kHz (adjust to within ±2kHz).
* Set VCO ON (SA24: D4) to [1] during adjustment.
SA26 D6
Force MONO
[0]
0 = Normal: Normal mode, 1 = Force MONO: Forced monaural
SA17
Separation
Process adjustment
Optimum value: Adjust to maximize separation at the standard electric field input.
D0-D5
Control
required
SA24
ST-Sens ADJ
FM:[0]
D3
0 = OFF (normal), 1 = ON (ST ON sensitivity increased)
When set to ON, the ST ON sensitivity (ON/OFF) is increased by approximately
1% compared to when set to OFF.
SA17
Pi-Can(Pilot Cancel Level
D6-D7
Control)
SA25
SNC DAC/AM-RF-AGC
D0-D4
Amp threshold value
(steep slope side)
FM:[0]
[Pi-Can]
Typical value: Center (process adjustment optional)
FM:
[SNC DAC]
Adjust to the specified separation at medium electric field input.
AM:[0]
[AM-RF-AGC]
Optimum value: Fix to [0].
SA25
SNC slope
Small bit value: Gentle slope, Large bit value: Steep slope
D5-D6
* If the value is too small, SEP operation may be performed even at weak electric
field input, resulting in a deteriorated ST S/N ratio.
SA26
De-emphasis
Set according to the destination.
D7
0: 50μsec [JPN], 1: 75μsec [US]
SA26
FM/AM
FM:*
Optimum value: Adjust to the specified frequency characteristics at weak electric
D0-D4
HCC DAC
AM:[12]
field input.
SA47
HCC SW
FM:[6]
The HCC frequency characteristics is set by the Pin 51 external capacity value and
AM:[3]
the internal resistor (adjustable).
D5
Optimum value: FM mode = [6], AM mode = [3]
FM mode = 6: HCC cutoff fc = 2.2kHz (when C51 = 2,200pF)
AM mode = 3: HCC cutoff fc = 800Hz (when C51 = 2,200pF)
SA24
D4
VCO ON
[0]
0: Normal mode, 1: MPX-VCO monitor test mode
[Pin 24 frequency measurement]
(In MPX-VCO monitor mode: Set DC SELECT SA09, D5 to D7 to SD/MPX VCO
OUT.)
No.A1709-31/68
LV25700PM
MRC
The MRC (Multipath Rejection Circuit) controls multipath noise by detecting the AC component of the IF S-meter
(AC). It consists of a noise amplifier and a detection circuit.
• Noise amplifier gain
The noise amplifier gain of the Pin 58 input is determined by the R2 and R1 resistors. (The gain can be lowered by
adding an external resistor.)
The gain can be further adjusted in four steps by the MRC Sens DAC. The high band frequency characteristics can be
adjusted by C57.
Smeter
27kΩ
60kΩ
SA10
AC Smeter SW
SA21
MRCSENS
30kΩ
5.3kΩ
68kΩ R1
R2
2 1
3
+
27kΩ
S-meter sub
57
58
3
+
2 -
1
SA21
T_CONST
SNC
BUFF 10kΩ
Detection
circuit
80kΩ
S-meter
refrence
voltage
MRC_Time
MRC_IN
56
C57
VCC
SA:D
Recommended Setting
SA21
MRC
D0-D1
Sensitivity
*
Description of Functions
Optimum value: According to the specifications.
Setting a smaller value enhances the sensitivity and increases the MRC amplifier
gain.
Setting a larger value worsens the sensitivity and reduces the MRC amplifier gain.
SA21
MRC Time constant
D2-D3
(Attack/Release Time)
*
Sets the recovery time constant when the multipath countermeasure circuit
operates.
(Time from the MONO status to ST recovery)
Setting a smaller value shortens the recovery time, and setting a larger value
lengthens the recovery time.
VCC(PIN53)
• Detection circuit
MRC the time constant used to control separation is as
follows.
MRC
Time
Constant
DAC
VCC(PIN53)
I56
C56
500Ω
58
Discharge: Determined by 100Ω and C56.
Charge: Determined by I56 and C56.
* I56 can be set in four steps by the MRC time constant DAC.
100Ω
BUFF
10kΩ
MPX
SNC
80kΩ
MRC time constant (reference values)
DAC
C56
Charge Time
Discharge Time
MRC_Time_Constant = 0
1μF
360ms
0.63ms
MRC_Time_Constant = 1
1μF
515ms
0.63ms
MRC_Time_Constant = 2
1μF
890ms
0.63ms
MRC_Time_Constant = 3
1μF
4.5s
0.63ms
DAC
C56
Charge Time
Discharge Time
MRC_Time_Constant = 0
0.47μF
215ms
0.5ms
MRC_Time_Constant = 0
1μF
360ms
0.63ms
MRC_Time_Constant = 0
2μF
790ms
0.9ms
No.A1709-32/68
LV25700PM
Bit Specifications
Slave address:
MSB
LSB
Function
A7
A6
A5
A4
A3
A2
A1
A0
1
1
1
0
1
1
1
0
WRITE mode
1
1
1
0
1
1
1
1
READ mode
A7
A6
A5
A4
A3
A2
A1
A0
0
0
0
0
0
0
0
1
SA1
0
0
0
0
0
0
1
0
SA2
0
0
0
0
0
0
1
1
SA3
Sub address:
LSB
∼
∼
∼
∼
∼
∼
∼
Function
∼
MSB
0
1
0
1
1
1
0
1
SA93
0
1
0
1
1
1
1
0
SA94
0
1
0
1
1
1
1
1
SA95
* Continuous write is possible from an arbitrary sub address (e.g. SA12 to SA23).
* Restart is prohibited: After the STOP condition is generated, always start again from the START condition.
SLAVE ADDRESS
MSB
S 1
S
P
ACK
R/W
1
1
0
1
1
SUB ADDRESS
LSB
1 R/W ACK
MSB
A7 A6
A5
A4
A3
DATA1-DATAn
A2
LSB
A1 A0
MSB
ACK
LSB
data
ACK
P
= START
= STOP
= Acknowledge
= READ / WRITE
SDA
SDA
SCL
SCL
S
P
START condition
STOP condition
DATAOUTPUT
BY TRANSMITTER
not acknowledge
DATAOUTPUT
BY RECEIVER
acknowledge
SCL FROM
MASTER
1
2
8
9
S
START
condition
clock pulse for
acknowledgement
No.A1709-33/68
LV25700PM
SCL/SDA Bus Line Characteristics
Item
Symbol
SCL clock frequency
Conditions
min
fSCL
typ
max
0
unit
100
kHz
START condition hold time
tHD;STA
4.0
μs
STOP condition setup time
tSU;STO
4.0
μs
SCL clock Low period
tLOW
4.7
μs
SCL clock High period
tHIGH
4.0
SDA and SCL signal rise time
tr
1000
ns
SDA and SCL signal fall time
tf
300
ns
Data hold time
tHD;DAT
0
2.7
μs
Data setup time
tSU;DAT
1
Time from the previous STOP condition until the
tBUF
BUSY = 0 to output
μs
μs
next START condition is generated
Low level input voltage
VIL
0
0.3VDD
V
High level input voltage
VIH
0.7VDD
VDD
V
*1: The values specified by No.1 to No.9 are the values when operating at SCL = 100kHz.
*2: No.10 is limited to the case when SA7 D7 and D6 are set to “01” or “11”.
*3: The VDD noted in No.11 and No.12 indicates the Pin 34 BUSVDD.
*4: I2C recommended operation: Using SA03 D1 bit I2C CK Low drive.
SDA
tBUF
tf
tLOW
tr
tSU;DAT
tf
tr
tHD;STA
SCL
S
tHD;SAT
tSU;STA
tHD;DAT
Sr
tSU;STO
P
tHIGH
No.A1709-34/68
LV25700PM
BIT MAP(ES9)
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
1
00000001
P15
P14
P13
P12
P11
P10
P9
P8
2
00000010
P7
P6
P5
P4
P3
P2
P1
P0
3
00000011
R3
R2
R1
R0
ULT
RDS_ON
I2C_SCK_LD
IQ_UP_LOW
4
00000100
AMFM
WEATHER
OSC_DIV1
OSC_DIV0
SEEK1
SEEK0
TUNER_OFF
5
00000101
RF_DAC7
RF_DAC6
RF_DAC5
RF_DAC4
RF_DAC3
RF_DAC2
RF_DAC1
RF_DAC0
6
00000110
ANT_DAC7
ANT_DAC6
ANT_DAC5
ANT_DAC4
ANT_DAC3
ANT_DAC2
ANT_DAC1
ANT_DAC0
7
00000111
UL/IFEND
BUSY
DZ1
DZ0
CTE
GT2
GT1
GT0
8
00001000
-
-
-
-
-
-
-
DIV_SW
9
00001001
DCSELCT2
DCSELCT1
DCSELCT0
NC_SENS
NC_SENS
NC_SENS
NC_SENS
NC_SENS
MAIN4
MAIN3
MAIN2
MAIN1
MAIN0
10
00001010
FIL_SENS3
FIL_SENS 2
FIL_SENS 1
FIL_SENS0
HPF_FC
IN_DETOFF
NCSENSE
DAC_9OFF
11
00001011
IN_DETON
AMAGC_ON
FMAGC_ON
S_METER4
S_METER3
S_METER2
S_METER1
S_METER0
12
00001100
SIG_Q3
SIG_Q2
SIG_Q1
SIG_Q0
QDP_ADJ3
QDP_ADJ2
QDP_ADJ1
QDP_ADJ0
13
00001101
FIL_VSMON
-
CF_ADJ_D5
CF_ADJ_D4
CF_ADJ_D3
CF_ADJ_D2
CF_ADJ_D1
CF_ADJ_D0
14
00001110
-
-
15
00001111
KEY_AGC3
KEY_AGC2
16
00010000
NULL5
NULL4
NULL3
NULL2
NULL1
NULL0
0
0
17
00010001
PICAN1
PICAN0
SEPD5
SEPD4
SEPD3
SEPD2
SEPD1
SEPD0
18
00010010
NOISE_SEN1
NOISE_SEN0
MPXVCO_5
MPXVCO_4
MPXVCO_3
MPXVCO_2
MPXVCO_1
MPXVCO_0
BWD_ADJ_D5 BWD_ADJ_D4 BWD_ADJ_D3 BWD_ADJ_D2 BWD_ADJ_D1 BWD_ADJ_D0
KEY_AGC1
KEY_AGC0
IRR_VG3
IRR_VG2
IRR_VG1
IRR_VG0
19
00010011
-
-
-
20
00010100
MUTEATT5
MUTEATT4
MUTEATT3
21
00010101
-
-
22
00010110
FIFGAIN3
FIFGAIN2
FIFGAIN1
23
00010111
W_AGC3
W_AGC2
W_AGC1
24
00011000
MSLOPE
AM_NC_OFF
-
VCO_ON
25
00011001
DTESTSW
SNCINC1
SNCINC0
SNC_DAC4
SNC_DAC3
26
00011010
DEEMPSW
MO_ST_SW
IRR_SW
HCC_DAC4
27
00011011
-
-
-
FM_PIND_OFF
28
00011100
-
-
-
SEEK_SD_ON4 SEEK_SD_ON3 SEEK_SD_ON2 SEEK_SD_ON1 SEEK_SD_ON0
29
00011101 SEEK_SD_BW3 SEEK_SD_BW2 SEEK_SD_BW1 SEEK_SD_BW0
-
-
-
-
30
00011110
-
-
-
-
31
00011111 QO_UNDDET_7 QO_UNDDET_6 QO_UNDDET_5 QO_UNDDET_4 QO_UNDDET_3 QO_UNDDET_2 QO_UNDDET_1 QO_UNDDET_0
32
00100000 QO_AFC_MAX_7 QO_AFC_MAX_6 QO_AFC_MAX_5 QO_AFC_MAX_4 QO_AFC_MAX_3 QO_AFC_MAX_2 QO_AFC_MAX_1 QO_AFC_MAX_0
-
-
AM_NC_STOP4 AM_NC_STOP3 AM_NC_STOP2 AM_NC_STOP1 AM_NC_STOP0
MUTEATT2
MUTEATT1
MUTEATT0
MONI MODE
REV MODE
T_CONST1
T_CONST0
MRCSENSE1
MRCSENSE0
FIFGAIN0
AMRFAGC3
AMRFAGC2
AMRFAGC1
AMRFAGC0
W_AGC0
N_AGC3
N_AGC2
N_AGC1
N_AGC0
AMVSM_SHIFT1 AMVSM_SHIFT0
-
-
ST_SENS_ADJ FORCENOAGC
-
-
SNC_DAC2
SNC_DAC1
SNC_DAC0
HCC_DAC3
HCC_DAC2
HCC_DAC1
HCC_DAC0
-
-
-
IFT_TRANS
33
00100001
34
00100010
QO_AFC_MIN_7 QO_AFC_MIN_6 QO_AFC_MIN_5 QO_AFC_MIN_4 QO_AFC_MIN_3 QO_AFC_MIN_2 QO_AFC_MIN_1 QO_AFC_MIN_0
35
00100011 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
36
00100100 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
37
00100101
38
00100110
BPF_MOD_MIN_7 BPF_MOD_MIN_6 BPF_MOD_MIN_5 BPF_MOD_MIN_4 BPF_MOD_MIN_3 BPF_MOD_MIN_2 BPF_MOD_MIN_1 BPF_MOD_MIN_0
39
00100111
BPF_SMR_MAX_7 BPF_SMR_MAX_6 BPF_SMR_MAX_5 BPF_SMR_MAX_4 BPF_SMR_MAX_3 BPF_SMR_MAX_2 BPF_SMR_MAX_1 BPF_SMR_MAX_0
40
00101000
BPF_SMR_MIN_7
BPF_SMR_MIN_6
BPF_SMR_MIN_5
BPF_SMR_MIN_4
BPF_SMR_MIN_3
BPF_SMR_MIN_2
BPF_SMR_MIN_1 BPF_SMR_MIN_0
41
00101001
BPF_LIMIT_7
BPF_LIMIT_6
BPF_LIMIT_5
BPF_LIMIT_4
BPF_LIMIT_3
BPF_LIMIT_2
BPF_LIMIT_1
BPF_LIMIT_0
42
00101010
BPF_FIX_7
BPF_FIX_6
BPF_FIX_5
BPF_FIX_4
BPF_FIX_3
BPF_FIX_2
BPF_FIX_1
BPF_FIX_0
43
00101011
BPF_FIX
BPF_TC_2
BPF_TC_1
BPF_TC_0
-
-
44
00101100
AFC_MAX_7
AFC_ MAX_6
AFC_ MAX_5
AFC_MAX_4
AFC_MAX_3
AFC_MAX_2
AFC_MAX_1
AFC_MAX_0
45
00101101
AFC_MIN_7
AFC_MIN_6
AFC_MIN_5
AFC_MIN_4
AFC_MIN_3
AFC_MIN_2
AFC_MIN_1
AFC_MIN_0
46
00101110
-
-
-
-
-
-
-
-
47
00101111
RDS_AFC
-
HCC_SW3
HCC_SW2
HCC_SW1
-
-
-
48
00110000
-
-
-
-
-
S_METER_INT_P
RF_INT_P
IRR_INT_P
49
00110001
-
-
-
-
-
-
-
-
50
00110010
QO_AFCUSE MUTE_TC_UP_2 MUTE_TC_UP_1 MUTE_TC_UP_0
-
MUTE_TC_DOWN_2 MUTE_TC_DOWN_1 MUTE_TC_DOWN_0
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
BPF_SLOPE_1 BPF_SLOPE_0
RDS_QO_UDET_7 RDS_QO_UDET_6 RDS_QO_UDET_5 RDS_QO_UDET_4 RDS_QO_UDET_3 RDS_QO_UDET_2 RDS_QO_UDET_1 RDS_QO_UDET_0
No.A1709-35/68
LV25700PM
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
51
00110011
RF_DAC_P0_7 RF_DAC_P0_6 RF_DAC_P0_5 RF_DAC_P0_4 RF_DAC_P0_3 RF_DAC_P0_2 RF_DAC_P0_1 RF_DAC_P0_0
52
00110100
RF_DAC_P1_7 RF_DAC_P1_6 RF_DAC_P1_5 RF_DAC_P1_4 RF_DAC_P1_3 RF_DAC_P1_2 RF_DAC_P1_1 RF_DAC_P1_0
53
00110101
RF_DAC_P2_7 RF_DAC_P2_6 RF_DAC_P2_5 RF_DAC_P2_4 RF_DAC_P2_3 RF_DAC_P2_2 RF_DAC_P2_1 RF_DAC_P2_0
54
00110110
RF_DAC_P3_7 RF_DAC_P3_6 RF_DAC_P3_5 RF_DAC_P3_4 RF_DAC_P3_3 RF_DAC_P3_2 RF_DAC_P3_1 RF_DAC_P3_0
55
00110111
RF_DAC_P4_7 RF_DAC_P4_6 RF_DAC_P4_5 RF_DAC_P4_4 RF_DAC_P4_3 RF_DAC_P4_2 RF_DAC_P4_1 RF_DAC_P4_0
56
00111000
RF_DAC_P5_7 RF_DAC_P5_6 RF_DAC_P5_5 RF_DAC_P5_4 RF_DAC_P5_3 RF_DAC_P5_2 RF_DAC_P5_1 RF_DAC_P5_0
57
00111001
RF_DAC_P6_7 RF_DAC_P6_6 RF_DAC_P6_5 RF_DAC_P6_4 RF_DAC_P6_3 RF_DAC_P6_2 RF_DAC_P6_1 RF_DAC_P6_0
58
00111010
RF_DAC_P7_7 RF_DAC_P7_6 RF_DAC_P7_5 RF_DAC_P7_4 RF_DAC_P7_3 RF_DAC_P7_2 RF_DAC_P7_1 RF_DAC_P7_0
59
00111011
ANT_DAC_P0_7 ANT_DAC_P0_6 ANT_DAC_P0_5 ANT_DAC_P0_4 ANT_DAC_P0_3 ANT_DAC_P0_2 ANT_DAC_P0_1 ANT_DAC_P0_0
60
00111100
ANT_DAC_P1_7 ANT_DAC_P1_6 ANT_DAC_P1_5 ANT_DAC_P1_4 ANT_DAC_P1_3 ANT_DAC_P1_2 ANT_DAC_P1_1 ANT_DAC_P1_0
61
00111101
ANT_DAC_P2_7 ANT_DAC_P2_6 ANT_DAC_P2_5 ANT_DAC_P2_4 ANT_DAC_P2_3 ANT_DAC_P2_2 ANT_DAC_P2_1 ANT_DAC_P2_0
62
00111110
ANT_DAC_P3_7 ANT_DAC_P3_6 ANT_DAC_P3_5 ANT_DAC_P3_4 ANT_DAC_P3_3 ANT_DAC_P3_2 ANT_DAC_P3_1 ANT_DAC_P3_0
63
00111111
ANT_DAC_P4_7 ANT_DAC_P4_6 ANT_DAC_P4_5 ANT_DAC_P4_4 ANT_DAC_P4_3 ANT_DAC_P4_2 ANT_DAC_P4_1 ANT_DAC_P4_0
64
01000000
ANT_DAC_P5_7 ANT_DAC_P5_6 ANT_DAC_P5_5 ANT_DAC_P5_4 ANT_DAC_P5_3 ANT_DAC_P5_2 ANT_DAC_P5_1 ANT_DAC_P5_0
65
01000001
ANT_DAC_P6_7 ANT_DAC_P6_6 ANT_DAC_P6_5 ANT_DAC_P6_4 ANT_DAC_P6_3 ANT_DAC_P6_2 ANT_DAC_P6_1 ANT_DAC_P6_0
66
01000010
ANT_DAC_P7_7 ANT_DAC_P7_6 ANT_DAC_P7_5 ANT_DAC_P7_4 ANT_DAC_P7_3 ANT_DAC_P7_2 ANT_DAC_P7_1 ANT_DAC_P7_0
67
01000011
-
-
-
SMETER_P0_4 SMETER_P0_3 SMETER_P0_2 SMETER_P0_1 SMETER_P0_0
68
01000100
-
-
-
SMETER_P1_4 SMETER_P1_3 SMETER_P1_2 SMETER_P1_1 SMETER_P1_0
69
01000101
-
-
-
SMETER_P2_4 SMETER_P2_3 SMETER_P2_2 SMETER_P2_1 SMETER_P2_0
70
01000110
-
-
-
SMETER_P3_4 SMETER_P3_3 SMETER_P3_2 SMETER_P3_1 SMETER_P3_0
71
01000111
-
-
-
SMETER_P4_4 SMETER_P4_3 SMETER_P4_2 SMETER_P4_1 SMETER_P4_0
72
01001000
-
-
-
SMETER_P5_4 SMETER_P5_3 SMETER_P5_2 SMETER_P5_1 SMETER_P5_0
73
01001001
-
-
-
SMETER_P6_4 SMETER_P6_3 SMETER_P6_2 SMETER_P6_1 SMETER_P6_0
74
01001010
-
-
-
SMETER_P7_4 SMETER_P7_3 SMETER_P7_2 SMETER_P7_1 SMETER_P7_0
75
01001011
-
-
-
-
-
-
-
-
76
01001100
-
-
-
-
-
-
-
-
77
01001101
-
-
-
-
-
-
-
-
78
01001110
-
-
-
-
-
-
-
-
79
01001111
-
-
-
-
-
-
-
-
80
01010000
AF_P15
AF_P14
AF_P13
AF_P12
AF_P11
AF_P10
AF_P9
AF_P8
81
01010001
AF_P7
AF_P6
AF_P5
AF_P4
AF_P3
AF_P2
AF_P1
AF_P0
82
01010010
AF_RFD7
AF_RFD6
AF_RFD5
AF_RFD4
AF_RFD3
AF_RFD2
AF_RFD1
AF_RFD0
83
01010011
AF_ANTD7
AF_ANTD6
AF_ANTD5
AF_ANTD4
AF_ANTD3
AF_ANTD2
AF_ANTD1
AF_ANTD0
84
01010100
-
-
-
-
-
-
-
-
85
01010101
-
-
-
-
-
-
-
-
86
01010110
-
-
-
-
-
-
-
-
87
01010111
-
-
-
-
-
-
-
-
88
01011000
-
-
-
-
-
-
-
-
89
01011001
-
-
-
-
-
-
-
-
90
01011010
-
-
-
-
-
-
-
-
91
01011011
-
-
-
-
-
-
-
-
92
01011100
-
-
-
-
-
-
-
-
93
01011101 CUSTOM_CODE_7 CUSTOM_CODE_6 CUSTOM_CODE_5 CUSTOM_CODE_4 CUSTOM_CODE_3 CUSTOM_CODE_2 CUSTOM_CODE_1 CUSTOM_CODE_0
94
01011110
AREA_CODE3 AREA_CODE2 AREA_CODE1 AREA_CODE0
95
01011111
CHECK_SUM7 CHECK_SUM6 CHECK_SUM5 CHECK_SUM4 CHECK_SUM3 CHECK_SUM2 CHECK_SUM1 CHECK_SUM0
ALIGN_NO3
ALIGN_NO2
ALIGN_NO1
ALIGN_NO0
No.A1709-36/68
LV25700PM
Special Commands (SA248 and SA252 are 3 bytes, other commands have no data.)
SA
Sub
Address
D7
D6
D5
WRITE_ID2
WRITE_ID1
WRITE_ID0
D4
D3
248
11111000
249
11111001
RDS MUTE ON
250
11111010
RDS MUTE OFF
D2
D1
D0
Flash Memory Write Mode Set
251
11111011
252
11111100
Flash Memory Default
253
11111101
Normal Frequency Change(SA01,SA02,SA05) for RDS AF Search
254
11111110
AF Frequency Change(SA80,SA81,SA82) for RDS AF Search
255
11111111
Firmware Version Information
WRITE_ID2
WRITE_ID1
WRITE_ID0
Flash Memory Write
No.A1709-37/68
LV25700PM
Bit Map (FM Initial Data)
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
1
00000001
0
0
0
0
1
0
0
0
2
00000010
1
0
0
0
0
0
0
0
3
00000011
1
1
0
0
0
0
0
0
4
00000100
0
0
0
0
0
1
0
0
5
00000101
1
0
0
1
1
0
1
0
6
00000110
*
*
*
*
*
*
*
*
7
00000111
0
1
0
1
0
0
1
1
8
00001000
0
0
0
0
0
0
0
0
9
00001001
1
0
0
1
0
0
1
0
10
00001010
0
1
0
1
0
0
0
0
11
00001011
0
0
0
*
*
*
*
*
12
00001100
1
0
1
0
0
1
1
0
13
00001101
0
0
*
*
*
*
*
*
14
00001110
0
0
*
*
*
*
*
*
15
00001111
0
1
0
0
1
0
0
1
16
00010000
*
*
*
*
*
*
0
0
17
00010001
*
*
*
*
*
*
*
*
18
00010010
0
0
*
*
*
*
*
*
19
00010011
0
0
0
0
0
0
0
0
20
00010100
1
1
1
1
1
1
0
0
21
00010101
0
0
1
0
1
1
0
1
22
00010110
1
0
1
0
1
1
0
0
23
00010111
0
1
1
0
0
0
1
1
24
00011000
0
0
0
0
0
1
0
0
25
00011001
0
1
0
*
*
*
*
*
26
00011010
1
0
0
0
1
1
1
0
27
00011011
0
0
0
0
0
0
0
1
28
00011100
0
0
0
*
*
*
*
*
29
00011101
0
1
0
1
0
0
0
0
30
00011110
0
0
0
0
0
0
0
0
31
00011111
0
0
0
0
1
0
1
1
32
00100000
1
0
1
0
0
1
1
0
33
00100001
0
1
1
1
0
0
1
1
34
00100010
0
0
0
0
0
0
0
0
35
00100011
*
*
*
*
*
*
*
*
36
00100100
*
*
*
*
*
*
*
*
37
00100101
0
0
0
0
0
0
0
0
38
00100110
0
0
0
0
0
0
0
0
39
00100111
0
0
0
0
0
0
0
0
40
00101000
0
0
0
0
0
0
0
0
41
00101001
1
1
1
1
1
1
1
1
42
00101010
0
0
0
0
0
0
0
0
43
00101011
0
0
0
0
0
0
1
0
44
00101100
1
0
1
0
0
1
1
0
45
00101101
0
1
1
1
0
0
1
1
46
00101110
0
0
0
0
0
0
0
0
47
00101111
1
0
1
1
0
0
0
0
48
00110000
0
0
0
0
0
0
0
0
49
00110001
0
0
0
0
0
0
0
0
50
00110010
0
0
0
0
1
0
1
1
No.A1709-38/68
LV25700PM
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
51
00110011
0
0
0
0
0
0
0
0
52
00110100
0
0
0
0
0
0
0
0
53
00110101
0
0
0
0
0
0
0
0
54
00110110
0
0
0
0
0
0
0
0
55
00110111
0
0
0
0
0
0
0
0
56
00111000
0
0
0
0
0
0
0
0
57
00111001
0
0
0
0
0
0
0
0
58
00111010
0
0
0
0
0
0
0
0
59
00111011
0
0
0
0
0
0
0
0
60
00111100
0
0
0
0
0
0
0
0
61
00111101
0
0
0
0
0
0
0
0
62
00111110
0
0
0
0
0
0
0
0
63
00111111
0
0
0
0
0
0
0
0
64
01000000
0
0
0
0
0
0
0
0
65
01000001
0
0
0
0
0
0
0
0
66
01000010
0
0
0
0
0
0
0
0
67
01000011
0
0
0
0
0
0
0
0
68
01000100
0
0
0
0
0
0
0
0
69
01000101
0
0
0
0
0
0
0
0
70
01000110
0
0
0
0
0
0
0
0
71
01000111
0
0
0
0
0
0
0
0
72
01001000
0
0
0
0
0
0
0
0
73
01001001
0
0
0
0
0
0
0
0
74
01001010
0
0
0
0
0
0
0
0
75
01001011
0
0
0
0
0
0
0
0
76
01001100
0
0
0
0
0
0
0
0
77
01001101
0
0
0
0
0
0
0
0
78
01001110
0
0
0
0
0
0
0
0
79
01001111
0
0
0
0
0
0
0
0
80
01010000
0
0
0
0
0
0
0
0
81
01010001
0
0
0
0
0
0
0
0
82
01010010
0
0
0
0
0
0
0
0
83
01010011
0
0
0
0
0
0
0
0
84
01010100
0
0
0
0
0
0
0
0
85
01010101
0
0
0
0
0
0
0
0
86
01010110
0
0
0
0
0
0
0
0
87
01010111
0
0
0
0
0
0
0
0
88
01011000
0
0
0
0
0
0
0
0
89
01011001
0
0
0
0
0
0
0
0
90
01011010
0
0
0
0
0
0
0
0
91
01011011
0
0
0
0
0
0
0
0
92
01011100
0
0
0
0
0
0
0
0
93
01011101
0
0
0
0
0
0
0
0
94
01011110
0
0
0
1
0
0
1
1
95
01011111
*
*
*
*
*
*
*
*
Green
Orange
Gray
*: FM adjustment
: Users should readjust as necessary. Asterisks indicate items that are already adjusted in SANYO Semiconductor’s tester process.
Other parameters (SA) also require readjustment when used outside SANYO Semiconductor’s recommended settings.
0: System reserved
No.A1709-39/68
LV25700PM
Bit Map (AM Initial Data)
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
1
00000001
0
1
0
1
1
0
1
1
2
00000010
0
1
1
0
1
0
0
0
3
00000011
0
1
1
1
0
0
0
0
4
00000100
1
0
0
0
0
1
0
0
5
00000101
0
0
0
0
0
0
0
0
6
00000110
0
0
0
0
0
0
0
0
7
00000111
0
1
0
1
0
0
1
1
8
00001000
0
0
0
0
0
0
0
0
9
00001001
1
0
0
0
1
1
1
1
10
00001010
0
0
0
0
0
0
1
0
11
00001011
0
0
0
1
1
1
0
1
12
00001100
0
0
0
0
0
0
0
0
13
00001101
0
0
0
0
0
0
0
0
14
00001110
0
0
0
0
0
0
0
0
15
00001111
0
1
0
1
0
0
0
0
16
00010000
0
0
0
0
0
0
0
0
17
00010001
0
0
0
0
0
0
0
0
18
00010010
1
0
0
0
0
0
0
0
19
00010011
0
0
0
1
1
1
1
1
20
00010100
0
0
1
1
0
0
0
0
21
00010101
0
0
0
0
0
0
0
0
22
00010110
1
0
0
1
1
1
0
0
1
23
00010111
0
1
0
0
0
1
1
24
00011000
0
0
0
0
0
1
0
0
25
00011001
0
0
0
0
0
0
0
0
26
00011010
1
0
0
0
1
1
0
0
27
00011011
0
0
0
0
0
0
0
0
28
00011100
0
0
0
*
*
*
*
*
29
00011101
0
0
0
0
0
0
0
0
30
00011110
0
0
0
0
0
0
0
0
31
00011111
0
0
0
0
0
0
0
0
32
00100000
0
0
0
0
0
0
0
0
33
00100001
0
0
0
0
0
0
0
0
34
00100010
0
0
0
0
0
0
0
0
35
00100011
0
0
0
0
0
0
0
0
36
00100100
0
0
0
0
0
0
0
0
37
00100101
0
0
0
0
0
0
0
0
38
00100110
0
0
0
0
0
0
0
0
39
00100111
0
0
0
0
0
0
0
0
40
00101000
0
0
0
0
0
0
0
0
41
00101001
0
0
0
0
0
0
0
0
42
00101010
0
0
0
0
0
0
0
0
43
00101011
0
0
0
0
0
0
0
0
44
00101100
0
0
0
0
0
0
0
0
45
00101101
0
0
0
0
0
0
0
0
46
00101110
0
0
0
0
0
0
0
0
47
00101111
1
0
0
1
1
0
0
0
48
00110000
0
0
0
0
0
0
0
0
49
00110001
0
0
0
0
0
0
0
0
50
00110010
0
0
0
0
0
0
0
0
No.A1709-40/68
LV25700PM
SA
Sub
Address
D7
D6
D5
D4
D3
D2
D1
D0
51
00110011
0
0
0
0
0
0
0
0
52
00110100
0
0
0
0
0
0
0
0
53
00110101
0
0
0
0
0
0
0
0
54
00110110
0
0
0
0
0
0
0
0
55
00110111
0
0
0
0
0
0
0
0
56
00111000
0
0
0
0
0
0
0
0
57
00111001
0
0
0
0
0
0
0
0
58
00111010
0
0
0
0
0
0
0
0
59
00111011
0
0
0
0
0
0
0
0
60
00111100
0
0
0
0
0
0
0
0
61
00111101
0
0
0
0
0
0
0
0
62
00111110
0
0
0
0
0
0
0
0
63
00111111
0
0
0
0
0
0
0
0
64
01000000
0
0
0
0
0
0
0
0
65
01000001
0
0
0
0
0
0
0
0
66
01000010
0
0
0
0
0
0
0
0
67
01000011
0
0
0
0
0
0
0
0
68
01000100
0
0
0
0
0
0
0
0
69
01000101
0
0
0
0
0
0
0
0
70
01000110
0
0
0
0
0
0
0
0
71
01000111
0
0
0
0
0
0
0
0
72
01001000
0
0
0
0
0
0
0
0
73
01001001
0
0
0
0
0
0
0
0
74
01001010
0
0
0
0
0
0
0
0
75
01001011
0
0
0
0
0
0
0
0
76
01001100
0
0
0
0
0
0
0
0
77
01001101
0
0
0
0
0
0
0
0
78
01001110
0
0
0
0
0
0
0
0
79
01001111
0
0
0
0
0
0
0
0
80
01010000
0
0
0
0
0
0
0
0
81
01010001
0
0
0
0
0
0
0
0
82
01010010
0
0
0
0
0
0
0
0
83
01010011
0
0
0
0
0
0
0
0
84
01010100
0
0
0
0
0
0
0
0
85
01010101
0
0
0
0
0
0
0
0
86
01010110
0
0
0
0
0
0
0
0
87
01010111
0
0
0
0
0
0
0
0
88
01011000
0
0
0
0
0
0
0
0
89
01011001
0
0
0
0
0
0
0
0
90
01011010
0
0
0
0
0
0
0
0
91
01011011
0
0
0
0
0
0
0
0
92
01011100
0
0
0
0
0
0
0
0
93
01011101
0
0
0
0
0
0
0
0
94
01011110
0
0
0
1
0
0
1
1
95
01011111
*
*
*
*
*
*
*
*
Yellow
Orange
Gray
*: AM adjustment
: Users should readjust as necessary. Asterisks indicate items that are already adjusted in SANYO Semiconductor’s tester process.
Other parameters (SA) also require readjustment when used outside SANYO Semiconductor’s recommended settings.
0: System reserved
No.A1709-41/68
LV25700PM
SA1. PLL N Value Higher-order 8 bits
D7
D6
D5
D4
D3
D2
D1
D0
P15
P14
P13
P12
P11
P10
P9
P8
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
SA2. PLL N Value Lower-order 8 bits
D7
D6
D5
D4
D3
D2
D1
D0
P7
P6
P5
P4
P3
P2
P1
P0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
*SA1: D7 to D0 [P7 ot P0] = ALL High
No.A1709-42/68
LV25700PM
SA3. Reference Counter Setting, RDS Control, I2C Format Switching, Flash Programming
D7
D6
R3
D5
R2
D4
R1
R0
MSB
D3
ULT
D2
RDS_ON
D1
D0
I C_SCK_LD
-
2
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
Not used. Fixed at 0.
SCK no L drive (normal mode)
1
SCK L drive
Hold SCL low until processing ends at the slave side.
0
RDS power OFF
1
RDS power ON
0
PLL unlock detection time 0.39μs
1
PLL unlock detection time 0.98μs
0
0
0
0
PLL stop
0
0
0
1
-
0
0
1
0
-
0
0
1
1
-
0
1
0
0
Ref = 5kHz
0
1
0
1
-
0
1
1
0
-
0
1
1
1
Ref = 10kHz
1
0
0
0
-
1
0
0
1
Ref = 25kHz
1
0
1
0
-
1
0
1
1
Ref = 50kHz
1
1
0
0
Ref = 100kHz
SA4. AM/FM/Weather, AM Frequency Division Setting, SEEK Mode, Tuner ON/OFF, FM Local Hi/Low
D7
D6
D5
D4
D3
D2
D1
D0
AMFM
WEATHER
OSC_DIV1
OSC_DIV0
SEEK1
SEEK0
TUNER_OFF
IQ_UP_LOW
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
1
Upper Local OSC (for US/EU)
Lower Local OSC (for JPN/East EU)
0
Running
1
Tuner OFF
0
0
Not used.
0
1
Receive
1
0
Not used.
1
1
SEEK/RDS
0
0
AM OSC frequency division ratio setting: 1/20
0
1
AM OSC frequency division ratio setting: 1/16
1
0
AM OSC frequency division ratio setting: 1/12
1
1
AM OSC frequency division ratio setting: 1/8
AM/FM band
Weather band (OSC = 1)
0
FM Mode
1
AM Mode
No.A1709-43/68
LV25700PM
SA5. FM RF 8bit DAC
D7
D6
D5
D4
D3
D2
D1
D0
RF_DAC7
RF_DAC6
RF_DAC5
RF_DAC4
RF_DAC3
RF_DAC2
RF_DAC1
RF_DAC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
-
-
-
-
-
-
-
-
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
RF DAC = 0.3V (min)
↓
RF DAC = 7.1V (max)
SA6. FM ANT 8bit DAC (IRR_ADJ)
D7
D6
D5
D4
D3
D2
D1
D0
ANT_DAC7
ANT_DAC6
ANT_DAC5
ANT_DAC4
ANT_DAC3
ANT_DAC2
ANT_DAC1
ANT_DAC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
ANT DAC = 0.3V (min)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
ANT DAC = 7.1V (max)
SA7. IF Count Time Setting & D0 Setting
D7
D6
D5
D4
D3
D2
D1
D0
UL/IFEND
BUSY
DZ1
DZ0
CTE
GT2
GT1
GT0
MSB
LSB
Function
D7
D6
D5
0
0
0
D4
0
D3
D2
D1
D0
0
0
0
IF count gate time = 0.878048msec
0
0
1
IF count gate time = 3.512195msec
0
1
0
IF count gate time = 7.024390msec
0
1
1
IF count gate time = 28.09756msec
1
0
0
IF count gate time = 56.195123msec
1
0
1
IF count gate time = 112.390244msec
0
Counter Reset
1
Count Start
DZC-A
0
1
DZC-B
1
0
DZC-C
1
1
DZC-D
Unlock detection: Unlock detection start = High, Lock = Low
BUSY signal: When the I2C slave address is received = High
0
1
1
0
IF count end signal: When D7, D6=10: High, IF count end: Low
1
1
UL|BUSY signal: Logical OR of unlock detection signal and BUSY signal is output.
Idling = Low
No.A1709-44/68
LV25700PM
SA8. 1/2, 1/3 Frequency Division Setting
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
DIV_SW
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
0
0
0
0
0
0
AM/FM band DIV 1/2 frequency division (for US/EU/East EU/SW/Weather)
FM band DIV 1/3 frequency division (for Japan)
Not used. Fixed at 0.
SA9. DC Monitor Select/SD Adjustment
D7
D6
D5
D4
D3
D2
D1
D0
DCSELCT2
DCSELCT1
DCSELCT0
NC_SENS
NC_SENS
NC_SENS
NC_SENS
NC_SENS
MAIN4
MAIN3
MAIN2
MAIN1
MAIN0
MSB
LSB
Function
D7
-
D6
-
D5
-
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
1
Receive mode: NC sensitivity threshold value = 0.32V
-
-
-
-
-
↓
1
1
1
1
0
Receive mode: NC sensitivity threshold value = 2.57V
1
1
1
1
1
Receive mode: NC sensitivity threshold value = 0.25V (detection sensitivity increase)
Receive mode: NC sensitivity threshold value = 2.65V (detection sensitivity decrease)
Select DC voltage output for the functions that are necessary during process adjustment.
0
0
0
0
0
1
Vafc
0
1
0
Undesired voltage
0
1
1
IF Filter BW OUT
1
0
0
SD/MPX VCO OUT [normally fixed bit]
1
0
1
Vsm
1
1
0
NC_GATE_OUT
1
1
1
D0 (not used)
[The setting is valid when SA20: D0 = 1.] Vref 2.7V
SA10. IF Filter sens
D7
D6
D5
D4
D3
D2
D1
D0
FIL_SENS 3
FIL_SENS 2
FIL_SENS 1
FIL_SENS 0
HPF_FC
IN_DETOFF
NCSENSE
DAC_9OFF
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
0
D1
D0
0
RF-DAC OFF_SW = ON mode [normal: When RF/ANT-DAC is used]
1
RF-DAC OFF_SW = OFF mode
0
AC S-meter additional resistor = 54kΩ
1
AC S-meter additional resistor = 27kΩ
IF Filter pickup = Normal
*(SA11_D7 = 0, SA10_D2 = 0)
1
IF Filter pickup = Only VsmAC
*(SA11_D7 = 0, SA10_D2 = 1)
0
RDS HPF fc = 100kHz
1
RDS HPF fc = 50kHz
0
0
0
0
Receive mode: IF filter sensitivity = High/at SEEK: SD bandwidth = Narrow
0
0
0
1
Receive mode: IF filter sensitivity =
1
1
1
0
Receive mode: IF filter sensitivity =
1
1
1
1
Receive mode: IF filter sensitivity = Low/at SEEK: SD bandwidth = Wide
↓
No.A1709-45/68
LV25700PM
SA11. Signal Meter Adjustment/AM/FM Forced AGC ON
D7
D6
D5
D4
D3
D2
D1
D0
IN_DETON
AMAGC_ON
FMAGC_ON
S_METER4
S_METER3
S_METER2
S_METER1
S_METER0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
1
FM Vsm (30dBμ) = 2.293V
FM Vsm (30dBμ) = 2.239V
↓
[AM mode: Fixed at 1DH]
1
1
1
1
0
FM Vsm (30dBμ) = 1.456V
1
1
1
1
1
FM Vsm (30dBμ) = 1.427V
0
FM forced RF AGC = OFF (normal)
1
FM forced RF AGC = ON (ANT_D ON)
0
AM forced RF AGC = OFF (normal)
1
AM forced RF AGC = ON (ANT_D ON)
IF Filter pickup = Normal
0
*(SA11_D7 = 0, SA10_D2 = 0)
IF Filter pickup = Only DETOUT
1
*(SA11_D7 = 1, SA10_D2 = 0)
SA12. Signal Quality/FM DET PHASE
D7
D6
D5
D4
D3
D2
D1
D0
SIG_Q3
SIG_Q2
SIG_Q1
SIG_Q0
QDP_ADJ3
QDP_ADJ2
QDP_ADJ1
QDP_ADJ0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
FM DET phase = -φ
0
0
0
1
FM DET phase =
1
1
1
0
FM DET phase =
1
1
1
1
FM DET phase = +φ
↓
0
0
0
0
0
0
0
1
Signal Quality threshold value = 0.2V
Signal Quality threshold value = 0.34V
↓
1
1
1
0
Signal Quality threshold value = 2.36V
1
1
1
1
Signal Quality threshold value = 2.5V
No.A1709-46/68
LV25700PM
SA13. Band Variable BPF (Center Frequency)
D7
D6
D5
D4
D3
D2
D1
D0
FIL_VSMON
-
CF_ADJ_D5
CF_ADJ_D4
CF_ADJ_D3
CF_ADJ_D2
CF_ADJ_D1
CF_ADJ_D0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
303.6kHz (CF bit = 0) *Mim
* Reference value
0
0
0
0
0
1
307.6kHz (CF bit = 1)
* Reference value
0
0
0
0
1
0
439.6kHz (CF bit = 29)
* Reference value
0
0
0
0
0
1
444.4kHz (CF bit = 30)
* Reference value
0
1
1
1
1
1
450kHz (Center frequency) (CF bit = 31)
* Reference value
1
0
0
0
0
0
450kHz (Center frequency) (CF bit = 32)
* Reference value
1
0
0
0
0
1
454.4kHz (CF bit = 33)
* Reference value
1
0
0
0
1
0
458.8kHz (CF bit = 34)
* Reference value
1
1
1
1
1
0
589.2kHz (CF bit = 62)
* Reference value
1
1
1
1
1
1
594kHz (CF bit = 63) *Max
* Reference value
0
Not used. Fixed at 0.
0
FILTER DC (Vsm) OUT OFF
1
FILTER DC (Vsm) OUT ON
SA14. Band Variable BPF (Band/Gain)
D7
D6
D5
D4
D3
D2
D1
D0
-
-
BWD_ADJ_D5
BWD_ADJ_D4
BWD_ADJ_D3
BWD_ADJ_D2
BWD_ADJ_D1
BWD_ADJ_D0
MSB
LSB
Function
D7
0
D6
0
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
Gain = -50dB (BW/G bit = 0) *Min
0
0
0
0
0
1
Gain =
dB (BW/G bit = 1)
* Reference value
0
0
0
0
1
0
Gain =
dB (BW/G bit = 29)
0
0
0
0
0
1
Gain =
0
1
1
1
1
1
Gain =
0dB (CF bit = 31)
* Reference value
1
0
0
0
0
0
Gain =
0dB (CF bit = 32)
* Reference value
1
0
0
0
0
1
Gain =
dB (BW/G bit = 33)
1
0
0
0
1
0
Gain =
dB (BW/G bit = 34)
1
1
1
1
1
0
Gain =
dB (BW/G bit = 62)
1
1
1
1
1
1
Gain = +50dB (BW/G bit = 63) *Max
dB (BW/G bit = 30)
* Reference value
Not used. Fixed at 0.
No.A1709-47/68
LV25700PM
SA15. Keyed AGC/IQ Mix Phase
D7
D6
D5
D4
D3
D2
D1
D0
KEY_AGC3
KEY_AGC2
KEY_AGC1
KEY_AGC0
IRR_VG3
IRR_VG2
IRR_VG1
IRR_VG0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
1
FM IQ MIX phase =
FM IQ MIX phase =
↓
0
0
0
0
0
0
0
1
1
1
1
0
1
1
1
1
FM IQ MIX phase =
FM IQ MIX phase =
FM Keyed AGC threshold value = 0.14V
AM IF Gain = 63dB (AGC FOM)
FM Keyed AGC threshold value = 0.24V
AM IF Gain = 62dB (AGC FOM)
↓
1
1
1
0
1
1
1
1
FM Keyed AGC threshold value = 2.07V
AM IF Gain = 49.5dB (AGC FOM)
FM Keyed AGC threshold value = 2.2V
AM IF Gain = 49dB (AGC FOM)
SA16. Null Voltage
D7
D6
D5
D4
D3
D2
D1
D0
NULL5
NULL4
NULL3
NULL2
NULL1
NULL0
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
D1
D0
0
0
Fixed (not used)
FM Null Voltage Low 1step = +30mV
FM Null Voltage High
SA17. Pilot Cancel/Separation Adjustment
D7
D6
D5
D4
D3
D2
D1
D0
PICAN1
PICAN0
SEPD5
SEPD4
SEPD3
SEPD2
SEPD1
SEPD0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
Sub level = max
↓
Sub level = min
0
0
Pilot cancel = Center
0
1
Pilot cancel = Low
1
0
Pilot cancel = High
1
1
Pilot cancel = OFF
No.A1709-48/68
LV25700PM
SA18. Noise Canceller Sensitivity/MPX_VCO
D7
D6
D5
D4
D3
D2
D1
D0
NOISE_SEN1
NOISE_SEN0
MPXVCO_5
MPXVCO_4
MPXVCO_3
MPXVCO_2
MPXVCO_1
MPXVCO_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
1
MPX VCO = 227kHz
MPX VCO = 230kHz
↓
1
1
1
1
1
0
1
1
1
1
1
1
MPX VCO = 369kHz
MPX VCO = 373kHz
0
0
Noise sens = 15k
0
1
Noise sens = 20k Sens = Hi
1
0
Noise sens = 6k Sens = Low
1
1
Noise sens = 10k
SA19. AM NC STOP Sensitivity
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
AM_NC_STOP4
AM_NC_STOP3
AM_NC_STOP2
AM_NC_STOP1
AM_NC_STOP0
MSB
LSB
Function
D7
0
D6
0
D5
D4
D3
D2
D1
D0
0
0
0
0
0
AM NC STOP = 0.3V ( = Vsm)
0
0
0
0
1
AM NC STOP = 0.51V ( = Vsm)
1
1
1
1
0
AM NC STOP = 4.06V ( = Vsm)
1
1
1
1
1
AM NC STOP = 4.19V ( = Vsm)
0
Not used. Fixed at 0.
SA20. FM Mute Adjustment (Noise Convergence Adjustment)
D7
D6
D5
D4
D3
D2
D1
D0
MUTEATT5
MUTEATT4
MUTEATT3
MUTEATT2
MUTEATT1
MUTEATT0
MONI MODE
REV MODE
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
0
1
0
0
0
0
0
0
0
0
0
0
0
1
D0
0
Normal
1
SMETER AD READ MODE (for test monitoring)
DC SELECT switching 0: SD/ST pin output [normally fixed bit]
DC SELECT switching 1: Each voltage output at the DC MONI pin.
[SA9: D7-D5 setting enabled]
FM MUTE attenuation = 2.0dB
AM NC Gate time = 1800μs (no input)
FM MUTE attenuation = 2.4dB
AM NC Gate time = 1500μs (no input)
↓
0
1
1
1
1
1
1
0
0
0
0
0
[Fixed value in AM mode: 0CH]
FM MUTE attenuation = dB
AM NC Gate time = 630μs (no input)
FM MUTE attenuation = dB
AM NC Gate time = 600μs (no input)
↓
1
1
1
1
1
0
1
1
1
1
1
1
FM MUTE attenuation = 25dB
AM NC Gate time = 335μs (no input)
FM MUTE attenuation = 25dB
AM NC Gate time = 330μs (no input)
No.A1709-49/68
LV25700PM
SA21. MRC Sensitivity, Time Constant/AM S-meter
D7
D6
-
-
D5
D4
AMVSM_SHIFT1 AMVSM_SHIFT0
MSB
D3
D2
D1
D0
T_CONST1
T_CONST0
MRCSENSE1
MRCSENSE0
LSB
Function
D7
D6
D5
D4
D3
D2
0
0
0
1
1
0
1
1
D1
D0
0
0
0
1
1
0
1
1
MRC sensitivity = Sens High
MRC sensitivity = Sens Low
MRC charge time = 360ms
MRC discharge time = 0.63ms
MRC charge time = 515ms
MRC discharge time = 0.63ms
MRC charge time = 890ms
MRC discharge time = 0.63ms
MRC charge time = 4.5s
MRC discharge time = 0.63ms
FM Mute SW mute_1V attenuation = 19dB
0
AM S-meter shifter
0
Input level = 30dBμ when Vsm = 1.5V
0
0
1
1
0
1
1
FM Mute SW mute_1V attenuation = 13dB
Input level = 38dBμ when Vsm = 1.5V
FM Mute SW mute_1V attenuation = 8dB
Input level = 46dBμ when Vsm = 1.5V
FM Mute SW mute_1V attenuation = 6dB
Input level = 55dBμ when Vsm = 1.5V
0
Not used. Fixed at 0.
SA22. AM REAGC/FM IF Gain
D7
D6
D5
D4
D3
D2
D1
D0
FIFGAIN3
FIFGAIN2
FIFGAIN1
FIFGAIN0
AMRFAGC3
AMRFAGC2
AMRFAGC1
AMRFAGC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
1
AM: RFAGC (hard) threshold value = 0.37V
AM: RFAGC (hard) threshold value = 0.47V
↓
0
0
0
0
0
0
0
1
1
1
1
0
1
1
1
1
1
1
1
0
AM: RFAGC (hard) threshold value = 1.94V
1
1
1
1
AM: RFAGC (hard) threshold value = 2.04V
FM IF Gain = Gain Low
↓
FM IF Gain = Gain High
No.A1709-50/68
LV25700PM
SA23. Wide/Narrow AGC
D7
D6
D5
D4
D3
D2
D1
D0
W_AGC3
W_AGC2
W_AGC1
W_AGC0
N_AGC3
N_AGC2
N_AGC1
N_AGC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
1
FM Narrow AGC ON = 67.8dBμ
* Reference value
AM Narrow AGC ON = 68.0dBμ
* Reference value
FM Narrow AGC ON = 68.0dBμ
* Reference value
AM Narrow AGC ON = 68.5dBμ
* Reference value
↓
1
1
0
0
0
0
0
0
1
1
1
1
0
1
0
1
FM Narrow AGC ON = 80dBμ
* Reference value
AM Narrow AGC ON = 82.7dBμ
* Reference value
FM Narrow AGC ON = 81dBμ
* Reference value
AM Narrow AGC ON = 83.6dBμ
* Reference value
FM Wide AGC ON = 94.5dBμ
* Reference value
AM Wide AGC ON = 89.0dBμ
* Reference value
FM Wide AGC ON = 94.7dBμ
* Reference value
AM Wide AGC ON = 89.3dBμ
* Reference value
↓
1
1
1
1
1
1
0
1
FM Wide AGC ON = 98.1dBμ
* Reference value
AM Wide AGC ON = 104.5dBμ
* Reference value
FM Wide AGC ON = 98.4dBμ
* Reference value
AM Wide AGC ON = 105.2dBμ
* Reference value
SA24.
D7
D6
D5
D4
D3
D2
D1
D0
MSLOPE
AM_NC_OFF
-
VCO_ON
ST_SENS_ADJ
FORCENOAGC
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
1
0
Not used. Fixed at 0.
Not used. Fixed at 0.
0
Force Noise AGC = OFF
1
Force Noise AGC = ON
0
Stereo ON sensitivity adjustment = 3%
1
Stereo ON sensitivity adjustment = 2% (ST sense up)
MPX VCO monitor = Normal
MPX VCO monitor = ON
Not used. Fixed at 0.
0
Normal
1
AM_NC_OFF
SLOPE × 2.0: Change in Mute voltage with respect to change in S-meter voltage
0
The first slope is x1, the second slope is x4
(Limiting is set to weak electric field, but cannot reduce the noise convergence.)
SLOPE × 1.0: Change in Mute voltage with respect to change in S-meter voltage
1
The first slope is x1, the second slope is x4
(normal)
No.A1709-51/68
LV25700PM
SA25. SNC Threshold Value Adjustment
D7
D6
D5
D4
D3
D2
D1
D0
DTESTSW
SNCINC1
SNCINC0
SNC_DAC4
SNC_DAC3
SNC_DAC2
SNC_DAC1
SNC_DAC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
1
SNC starting point threshold value = 0.7V
AM RF AGC (soft) threshold value = 0.7V
SNC starting point threshold value = 0.73V
AM RF AGC (soft) threshold value = 0.73V
↓
0
0
1
1
1
1
1
1
0
1
1
1
1
1
SNC starting point threshold value = 1.80V
AM RF AGC (soft) threshold value = 1.80V
SNC starting point threshold value = 1.83V
AM RF AGC (soft) threshold value = 1.83V
SNC slope = Gentle
↓
SNC slope = S teep
0
DAC TEST = Normal
1
DAC TEST = DAC TEST MODE
SA26. De-emphasis Switching/HCC Threshold Value Adjustment
D7
D6
D5
D4
D3
D2
D1
D0
DEEMPSW
MO_ST_SW
IRR_SW
HCC_DAC4
HCC_DAC3
HCC_DAC2
HCC_DAC1
HCC_DAC0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
HCC starting point threshold value = 0.50V
0
0
0
0
1
HCC starting point threshold value = 0.53V
1
1
1
1
0
HCC starting point threshold value = 0.47V
1
1
1
1
1
HCC starting point threshold value = 1.50V
↓
0
Image rejection fine adjustment OFF [when SA6: ANT-DAC is used]
1
Image rejection fine adjustment ON [when SA6: IRR-DAC is used]
0
Forced monaural = OFF
1
Forced monaural = ON
0
De-emphasis = 50μsec
1
De-emphasis = 75μsec
SA27. FM RF Automatic Adjustment Mode Setting
D7
D6
D5
D4
D3
D2
D1
D0
-
-
USR_RF_TUNE
FM_PIND_OFF
USR_NRML
-
-
IFT_TRANS
MSB
LSB
Function
D7
D6
D5
D4
D3
0
1
0
0
0
0
D2
0
D1
0
D0
0
Not used.
1
MIX TRANS mode (FM normal)
Not used. Fixed at 0.
FM PIN diode forced OFF (for experimentation)
Default setting
Not used. Fixed at 0.
* D5: Auto Tune [0: ON/1:OFF], D4: Pin D [0: Normal/1: OFF = Auto tune], D3: Counter [0: ON = At auto tune/1: OFF]
No.A1709-52/68
LV25700PM
SA28. At SEEK: SD Adjustment
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
SEEK_SD_ON4
SEEK_SD_ON3
SEEK_SD_ON2
SEEK_SD_ON1
SEEK_SD_ON0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
At SEEK: SD ON Sensitivity = High
0
0
0
0
0
0
0
1
↓
0
0
0
1
1
1
1
0
↓
0
0
0
1
1
1
1
1
At SEEK: SD ON Sensitivity = Low
↓
SA29. At SEEK: SD Bandwidth
D7
D6
D5
D4
D3
D2
D1
D0
SEEK_SD_BW3
SEEK_SD_BW2
SEEK_SD_BW1
SEEK_SD_BW0
-
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
At SEEK: SD bandwidth = Narrow
0
0
0
1
0
0
0
0
↓
↓
1
1
1
0
0
0
0
0
↓
1
1
1
1
0
0
0
0
At SEEK: SD bandwidth = Wide
SA30. Reserved
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
System reserved area
SA31. Signal Quality Sensitivity Setting
D7
D6
D5
D4
D3
D2
D1
D0
QO_UNDDET_7
QO_UNDDET_6
QO_UNDDET_5
QO_UNDDET_4
QO_UNDDET_3
QO_UNDDET_2
QO_UNDDET_1
QO_UNDDET_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Signal Quality sense = High (threshold value low)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Signal Quality sense = Low (threshold value high)
No.A1709-53/68
LV25700PM
SA32. IF Band Variable AFC Control (+ Side)
D7
D6
D5
D4
D3
D2
D1
D0
QO_AFC_MAX_7 QO_AFC_MAX_6 QO_AFC_MAX_5 QO_AFC_MAX_4 QO_AFC_MAX_3 QO_AFC_MAX_2 QO_AFC_MAX_1 QO_AFC_MAX_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Q_AFC sense = High [+side] (threshold value low)
* Provide hysteresis with respect to the SA33 settings.
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Q_AFC sense = Low [+ side] (threshold value high)
SA33. IF Band Variable AFC Control (- Side)
D7
D6
QO_AFC_MIN_7
D5
D4
QO_AFC_MIN_6 QO_AFC_MIN_5 QO_AFC_MIN_4
MSB
D3
D2
D1
QO_AFC_MIN_3 QO_AFC_MIN_2 QO_AFC_MIN_1
D0
QO_AFC_MIN_0
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Q_AFC sense = High [- side] (threshold value low)
* Provide hysteresis with respect to the SA32 settings.
↓
Q_AFC sense = Low [- side] (threshold value high)
SA34. FM MUTE Time Constant Setting/Signal Quality Band Control
D7
D6
QO_AFCUSE
D5
D4
D3
MUTE_TC_UP_2 MUTE_TC_UP_1 MUTE_TC_UP_0
MSB
-
D2
D1
D0
MUTE_TC_DOWN2 MUTE_TC_DOWN1 MUTE_TC_DOWN0
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
Uses no AFC voltage information for the quality-out output.
1
Uses AFC voltage information for the quality-out output.
0
0
0
MUTE time constant (UP)_ 2ms/1 step
0
0
1
MUTE time constant (UP)_ 8ms/1 step
0
1
0
MUTE time constant (UP)_ 16ms/1 step
0
1
1
MUTE time constant (UP)_ 32ms/1 step
0
Not used. Fixed at 0.
0
0
0
0
0
1
MUTE time constant (DOWN)_ 2ms/1 step
MUTE time constant (DOWN)_ 8ms/1 step
0
1
0
MUTE time constant (DOWN)_ 16ms/1 step
0
1
1
MUTE time constant (DOWN)_ 32ms/1 step
No.A1709-54/68
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
Function
D7
D6
D5
D4
D3
D2
D1
D0
FM limiting sensitivity adjustment 2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Adjusting the threshold value (second start point: Mute voltage slope x 2) at which noise
convergence is to be achieved.
0: Threshold value Low (weak electric field)
↓
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
Function
D7
D6
D5
D4
D3
D2
D1
D0
FM limiting sensitivity adjustment 1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Adjusting the threshold value (first start point: Mute voltage slope x 1) at which -3 dB
sensitivity adjustment is to be performed.
0: Threshold value Low (weak electric field)
↓
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
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
IF filter modulation index detection threshold value [+ side] = Low
* Provide hysteresis with respect to the Narrow/SA38 settings if the threshold value is
exceeded.
↓
IF filter modulation index detection threshold value [+ side] = High
* Provide hysteresis with respect to the Narrow/SA38 settings if the threshold value is
exceeded.
No.A1709-55/68
LV25700PM
SA38. Modulation Index Detection Sensitivity (- Side)
D7
D6
D5
D4
D3
D2
D1
D0
BPF_MOD_MIN_7 BPF_MOD_MIN_6 BPF_MOD_MIN_5 BPF_MOD_MIN_4 BPF_MOD_MIN_3 BPF_MOD_MIN_2 BPF_MOD_MIN_1 BPF_MOD_MIN_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
IF filter modulation index detection threshold value [- side] = Low
* Provide hysteresis with respect to the Narrow/SA37 settings if the threshold value is
exceeded.
↓
IF filter modulation index detection threshold value [- side] = High
* Provide hysteresis with respect to the Narrow/SA37 settings if the threshold value is
exceeded.
SA39. Modulation Index Detection Operation Start Point (+ side)
D7
D6
D5
D4
D3
D2
D1
D0
BPF_SMR_MAX_7 BPF_SMR_MAX_6 BPF_SMR_MAX_5 BPF_SMR_MAX_4 BPF_SMR_MAX_3 BPF_SMR_MAX_2 BPF_SMR_MAX_1 BPF_SMR_MAX_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
IF filter modulation index detection function OFF threshold value [+ side] = Low
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Turns off the modulation detection function above a certain electric field strength
(compared with S-meter value) or stronger.
* Provide hysteresis with respect to the SA40 settings.
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
IF filter modulation index detection function OFF threshold value [+ side] = High
SA40. Modulation Index Detection Operation Start Point (- side)
D7
D6
D5
D4
D3
D2
D1
D0
BPF_SMR_MIN_7 BPF_SMR_MIN_6 BPF_SMR_MIN_5 BPF_SMR_MIN_4 BPF_SMR_MIN_3 BPF_SMR_MIN_2 BPF_SMR_MIN_1 BPF_SMR_MIN_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
IF filter modulation index detection function OFF threshold value [- side] = Low
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Turns off the modulation detection function above a certain electric field strength
(compared with S-meter value) or stronger.
* Provide hysteresis with respect to the SA39 settings.
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
IF filter modulation index detection function OFF threshold value [- side] = High
No.A1709-56/68
LV25700PM
SA41. IF Filter Band Limitation
D7
D6
D5
D4
D3
D2
D1
D0
BPF_LIMIT_7
BPF_LIMIT_6
BPF_LIMIT_5
BPF_LIMIT_4
BPF_LIMIT_3
BPF_LIMIT_2
BPF_LIMIT_1
BPF_LIMIT_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Limits the narrow band of the IF filter. [Wide band is as is = 180kHz.]
0: 180kHz (narrow band 180kHz = No band control)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
255:40kHz
SA42. IF Filter band Fixing
D7
D6
D5
D4
D3
D2
D1
D0
BPF_FIX_7
BPF_FIX_6
BPF_FIX_5
BPF_FIX_4
BPF_FIX_3
BPF_FIX_2
BPF_FIX_1
BPF_FIX_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Fixes the band of the IF filter. [Enabled when SA43 D7 = 1]
0: 180kHz (forced wide band)
↓
255: 40kHz (forced narrow band)
SA43. IF Filter Time Constant/Detection Sensitivity
D7
D6
D5
D4
D3
D2
D1
D0
BPF_FIX
BPF_TC_2
BPF_TC_1
BPF_TC_0
-
-
BPF_SLOPE_1
BPF_SLOPE_0
MSB
LSB
Function
D7
D6
D5
D4
D3
0
0
1
D2
0
D1
D0
0
0
0
1
× 1.0:
1
0
× 2: Detection sensitivity high
Adjusts the sensitivity of the IF filter (coarse adjustment).
× 0.5: Detection sensitivity low
Not used. Fixed at 0.
0
0
0
IF Filter sampling time = 2.19 ms
0
0
1
IF Filter sampling time = 8.78ms
0
1
0
IF Filter sampling time = 17.56ms
0
1
1
IF Filter sampling time = 35.12ms
IF Filter band forced mode switch
0: IF Filter band auto mode (normal)
1: IF Filter band forced mode [SA42 settings enabled]
No.A1709-57/68
LV25700PM
SA44. IF Band Variable AFC Control (+ Side)
D7
D6
D5
D4
D3
D2
D1
D0
AFC_MAX_7
AFC_MAX_6
AFC_MAX_5
AFC_MAX_4
AFC_MAX_3
AFC_MAX_2
AFC_MAX_1
AFC_MAX_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
IF Filter AFC control threshold value [+ side] = 0: Threshold value Low (sensitive to
interference Δf small)
* Provide hysteresis with respect to the SA45 settings.
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
↓
IF Filter AFC control threshold value [+ side] = 255: Threshold value High (sensitive to
interference Δf large)
SA45. IF Band Variable AFC Control (- Side)
D7
D6
D5
D4
D3
D2
D1
D0
AFC_MIN_7
AFC_MIN_6
AFC_MIN_5
AFC_MIN_4
AFC_MIN_3
AFC_MIN_2
AFC_MIN_1
AFC_MIN_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
IF Filter AFC control threshold value [- side] = 0: Threshold value Low (sensitive to
interference Δf small)
* Provide hysteresis with respect to the SA44 settings.
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
↓
IF Filter AFC control threshold value [- side] = 255: Threshold value high (sensitive to
interference Δf large)
SA46. Reserved
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
System reserved area
No.A1709-58/68
LV25700PM
SA47. HCC Cut-off Frequency/Automatic Interpolation Setting/Others
D7
D6
D5
D4
D3
D2
D1
D0
RDS_AFC
INT_ATT_ON
HCC_SW3
HCC_SW2
HCC_SW1
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
HCC cut-ff adjustment: fc = 400Hz (when C51 = 2200pF)
0
0
1
HCC cut-ff adjustment: fc = 500Hz (when C51 = 2200pF)
0
1
0
HCC cut-ff adjustment: fc = 600Hz (when C51 = 2200pF)
0
1
1
HCC cut-ff adjustment: fc = 800Hz (when C51 = 2200pF) * Recommended for AM
1
0
0
HCC cut-ff adjustment: fc = 1kHz (when C51 = 2200pF)
1
0
1
HCC cut-ff adjustment: fc = 1.4kHz (when C51 = 2200pF)
1
1
0
HCC cut-ff adjustment: fc = 2.2kHz (when C51 = 2200pF) * Recommended for FM
1
1
1
HCC cut-ff adjustment: fc = 5.5kHz (when C51 = 2200pF)
0
Not used. Fixed at 0.
Not used. Fixed at 0.
0
AF search time constant switching: AF search mode
1
AF search time constant switching: Receive/at SEEK
SA48. DAC Interpolation Selection
D7
D6
-
D5
-
D4
-
-
MSB
D3
-
D2
S_METER
INT_P
D1
D0
RF_INT_P
IRR_INT_P
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
IRR-ADJ automatic interpolation disabled (no interpolation by internal firmware)
1
IRR ADJ automatic interpolation enabled
0
RF-DAC automatic interpolation disabled (no interpolation by internal firmware)
1
0
0
0
0
RF-DAC automatic interpolation enabled
0
S_METER_SHIFT automatic interpolation disabled (no interpolation by internal firmware)
1
S_METER_SHIFT automatic interpolation enabled
0
System reserved area
SA49. Reserved
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
System reserved area
No.A1709-59/68
LV25700PM
SA50. RDS Signal Quality Sensitivity Setting
D7
D6
D5
D4
D3
D2
D1
D0
RDS_QO_UDET_7 RDS_QO_UDET_6 RDS_QO_UDET_5 RDS_QO_UDET_4 RDS_QO_UDET_3 RDS_QO_UDET_2 RDS_QO_UDET_1 RDS_QO_UDET_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
Signal Quality sense = High (threshold value low)
↓
Signal Quality sense = Low (threshold value high)
SA51 to 58. FM RF 8-bit DAC Point Values
D7
D6
D5
D4
D3
D2
D1
D0
RF_DAC_POINT_7 RF_DAC_POINT_6 RF_DAC_POINT_5 RF_DAC_POINT_4 RF_DAC_POINT_3 RF_DAC_POINT_2 RF_DAC_POINT_1 RF_DAC_POINT_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
RF DAC = 0.3V (min)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
RF DAC = 7.1V (max)
SA59 to 66. FM ANT 8-bit DAC Point Values (IRR_POINT)
D7
D6
D5
D4
D3
D2
D1
D0
ANT_DAC_POINT_7 ANT_DAC_POINT_6 ANT_DAC_POINT_5 ANT_DAC_POINT_4 ANT_DAC_POINT_3 ANT_DAC_POINT_2 ANT_DAC_POINT_1 ANT_DAC_POINT_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
ANT DAC = 0.3V (min)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
ANT DAC = 7.1V (max)
SA67 to 74. Signal meter Point Values
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
S_METER4
S_METER3
S_METER2
S_METER1
S_METER0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
FM Vsm (30dBμ) = 2.293V
0
0
0
0
1
FM Vsm (30dBμ) = 2.239V
1
1
1
1
0
FM Vsm (30dBμ) = 1.456V
1
1
1
1
1
FM Vsm (30dBμ) = 1.427V
↓
0
0
0
Not used. Fixed at 0.
No.A1709-60/68
LV25700PM
The point frequencies are fixed as shown in the table below. The place of destination is selected using the area code
[SA94 D7-D4] and Align number [SA94 D3-D0].
Area
JAPAN
USA
USA + Weather
Europe
Europe + OIRT
0000
0001
0100
0010
0011
Area code
[SA94 D7-D4]
Align number
[SA94 D3-D0]
0011
0011
0101
0011
0101
0011
0101
0011
0101
Point0
76
87.9
87.9
87.9
87.9
87.5
87.5
65
65
Point1
83
98.1
90.1
98.1
90.1
98
90
70
70
Point2
90
108.1
108
74
98.1
108.1
98.1
98
74
Point3
106.1
162.4
106.1
106
87.5
87.5
Point4
108.1
162.55
108.1
108
98
90
Point5
162.4
Point6
162.55
108
98
106
Point7
108
SA75 to 79, SA83 to 92. Reserved
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
-
-
-
-
-
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
System reserved area
SA80. AF Search PLL N Value Higher-order 8 Bits
D7
D6
D5
D4
D3
D2
D1
D0
AF_P15
AF_P14
AF_P13
AF_P12
AF_P11
AF_P10
AF_P9
AF_P8
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
No.A1709-61/68
LV25700PM
SA81. AF Search PLL N Value Lower-order 8 Bits
D7
D6
D5
D4
D3
D2
D1
D0
AF_P7
AF_P6
AF_P5
AF_P4
AF_P3
AF_P2
AF_P1
AF_P0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
-
-
-
-
-
-
-
-
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
* SA1: D7 to D0 [P7 to P0] = ALL High
SA82. AF Search RF 8-bit DAC
D7
D6
D5
D4
D3
D2
D1
D0
AF_RFD7
AF_RFD6
AF_RFD5
AF_RFD4
AF_RFD3
AF_RFD2
AF_RFD1
AF_RFD0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
RF DAC = 0.3V (min)
↓
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
RF DAC = 7.1V (max)
SA83. AF Search ANT 8-bit DAC (Not used when used as IRR_ADJ)
D7
D6
D5
D4
D3
D2
D1
D0
AF_ANTD7
AF_ANTD6
AF_ANTD5
AF_ANTD4
AF_ANTD3
AF_ANTD2
AF_ANTD1
AF_ANTD0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
ANT DAC = 0.3V (min)
↓
ANT DAC = 7.1V (max)
No.A1709-62/68
LV25700PM
SA93. Custom Code
D7
D6
D5
D4
D3
D2
D1
D0
CUSTOM_CODE_7 CUSTOM_CODE_6 CUSTOM_CODE_5 CUSTOM_CODE_4 CUSTOM_CODE_3 CUSTOM_CODE_2 CUSTOM_CODE_1 CUSTOM_CODE_0
* Used to store information about anything other than the place of destination
SA94. Place of Destination Selection
D7
D6
D5
D4
D3
D2
D1
D0
AREA_CODE_3
AREA_CODE_2
AREA_CODE_1
AREA_CODE_0
ALIGN_NO_3
ALIGN_NO_2
ALIGN_NO_1
ALIGN_NO_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
0
0
1
1
0
1
0
1
POINT Data count 3 (See the above POINT Frequency Chart for details.)
POINT Data count 5 (See the above POINT Frequency Chart for details.)
0
0
0
0
For Japan
0
0
0
1
For USA and Canada
0
0
1
0
For Europe
0
0
1
1
For Europe and OIRT
0
1
0
0
For USA, Canada plus Weather band
SA95. Checksum
D7
D6
D5
D4
D3
D2
D1
D0
CHECK_SUM_7
CHECK_SUM_6
CHECK_SUM_5
CHECK_SUM_4
CHECK_SUM_3
CHECK_SUM_2
CHECK_SUM_1
CHECK_SUM_0
MSB
LSB
Function
D7
D6
D5
D4
D3
D2
D1
D0
Checksum area
No.A1709-63/68
LV25700PM
Special Commands
SA 248. Flash Write Mode Set ( 3 Bytes)
DATA2
DATA1
DATA0
ID2
ID1
ID0
This sets the flash memory write mode. Set arbitrary values other than 000000H or FFFFFFH in the 3 ID bytes. This
command sets the flash memory to write mode. Actual write to the flash memory is performed by transmitting
SA252 within 150ms after transmitting this command, and then executing write.
SA 249. RDS Mute ON
This mute command (DET OUT attenuation factor = 40dB) is used for AF search and other operations in RDS mode.
* This command consists of only a slave address and sub address, and there is no data.
SA 250. RDS Mute OFF
This command is used to set the above-noted RDS mute to OFF. RDS mute is automatically set to OFF during reset,
when switching the SA04 FM/AM bit, and when executing SA252 Flash Write.
* This command consists of only a slave address and sub address, and there is no data.
SA 251. Flash Default
This command reads the SA01 to SA95 data for the current band (FM or AM) from the LV25700 internal flash
memory. It is used to discard the adjustment data, or when performing verification after executing flash write by
SA252.
During reset the LV25700 automatically reads the FM data from the flash memory. In addition, when switching the
band, the LV25700 also automatically reads the FM data from the flash memory, so execution of this command is
not necessary in these cases.
* This command consists of only a slave address and sub address, and there is no data.
SA 252. Flash Write (3 Bytes)
DATA2
DATA1
DATA0
ID2
ID1
ID0
This command writes the SA01 to SA95 data in the flash memory. This command is used as a set together with
SA248 to prevent write errors. When this command is transmitted within 150ms after transmitting SA248 and the
IDs match, the SA01 to SA95 setting values for the current band (FM or AM) are written in the LV25700 internal
flash memory. This command should be executed after all the adjustment data is set and the SA95 checksum data is
transmitted.
Note that the FM and AM setting values are written in separate areas of the flash memory.
Set the inverse value of the ID transmitted by SA248 in the 3 ID bytes.
SA 253. Switching the Normal Frequency
This command switches the frequency and RF DAC value switched by SA254 to the normal (designated by SA1,
SA2 and SA5) frequency and RF DAC value.
* This command consists of only a slave address and sub address, and there is no data.
SA 254. Switching the AF Frequency
This command switches to the frequency and RF DAC value designated by SA80, SA81 and SA82.
* This command consists of only a slave address and sub address, and there is no data.
No.A1709-64/68
LV25700PM
SA 255. Firmware Information
After this command is sent, the LV25700 enters the firmware information send wait status.
The firmware information can be read by reading 8 bytes.
For further details, refer to IIC-DATA-OUTPUT (FIRMWARE INFORMATION).
* This command consists of only a slave address and sub address, and there is no data.
I2C-DATA-OUTPUT
S
1
1
1
0
1
1
1
1
ACK
∼
SLAVE ADDRESS (READ)
∼
-
-
-
-
C19 C18 C17 C16 ACK
(2) IF-COUNT
∼
C15 C14 C13 C12 C11 C10 C09 C08 ACK C07 C06 C05 C04 C03 C02 C01 C00 ACK
P
(2) IF-COUNT
Number
Description
Calls the data inside the IC.
(1)
Current SD only
Data obtained by latching the contents of the IF count counter (20-bit binary counter).
(2)
C19: Binary counter MSB
C0: Binary counter LSB
I2C-DATA-OUTPUT (SA DATA OUTPUT)
This is used to notify the host microcontroller of the LV25700 sub address setting information.
Set the slave address (write), and load the sub address (01 to 95) with the information to be acquired with D7 set to 1.
Next set the slave address (read) and read 8 bytes (fixed to 8 bytes).
8 bytes of sub address information can be read starting from the sub address n designated by the slave address (write) to
n + 7. 95 (0x5F) and subsequent data are unpredictable.
S
1
1
1
0
1
1
1
0
Slave address (WRITE)
S
1
1
1
0
1
1
ACK
1
*
*
*
*
*
*
1
0
ACK
*
*
*
*
*
*
*
*
*
*
*
ACK
P
*
*
Sub address n + 6 information
*
*
*
*
*
*
ACK
∼
*
*
ACK
∼
*
*
ACK
P
Sub address n information
*
*
ACK
*
*
Slave address n + 1 information
Omitted
*
Sub address n (00 to 95) with the information to be acquired
Slave address (READ)
∼
*
*
*
*
*
*
Sub address n + 2 information
*
ACK
*
*
*
*
*
*
Sub address n + 7 information
No.A1709-65/68
LV25700PM
I2C-DATA-OUTPUT (FIRMWARE INFORMATION)
This is used to notify the host microcontroller of the LV25700 firmware information.
Designate 0xff as the sub address to be acquired, and get 8 bytes of data with SA DATA OUT as follows (fixed to 8
bytes).
Data other than each firmware information is undetermined.
S
1
1
1
0
1
1
1
0
ACK
1
1
1
Slave address (WRITE)
S
1
1
1
0
1
1
*
*
*
*
*
*
1
1
ACK
*
*
-
-
-
-
-
-
1
1
1
ACK
P
*
*
*
*
*
*
ACK
∼
*
*
ACK
∼
-
-
ACK
P
Firmware version integer portion
(HEX)
*
*
ACK
*
*
Firmware version decimal portion
(HEX)
Omitted
1
Designate 0xff
Slave address (READ)
∼
1
-
*
*
*
*
Firmware revision information
(HEX)
-
ACK
-
-
-
-
-
-
No.A1709-66/68
8V
5V
C2B
100μF
C74B
10μF
+
C71
1μF
IF_GND
1ST_IF_IN2
1ST_IF_IN1
IF_VCC_5V
1ST_IF_OUT
R71
MOD_DET
2ND_MIXIN1
2ND_MIXIN2
77
76
75
74
73
72
71
70
69
68
67
T80
IFT_10.7M
MIX_OUT2
80
C78 AM_RF_AGC
1μF
78
HCC_CONT
C79
1μF
79
RFAGC_IN
BYPASS
C77
1μF
C80
0.022μF
C2A
0.022μF
R80
30Ω
SEPA_ADJ
AM_MIX2
C69
0.022μF
C76
0.022μF
C74A
0.022μF
CF1
CF_10.7M
+
CF2
CF_10.7M
T68
IFT_450k
65
C66 IFAGC_LPF
1μF
66
AM_LC
C67
1μF PILOT_DET
C65
1μF
1
64
63
2
R2
680Ω
L_AM3
1mH
L_AM4
47μH
D
5
AM_ANT
L_AM2
30mH
C5B
0.022μF
C5
0.022μF
D3
1SV251
8
9
IQ_MIX.
LMT
HPF
LPF
MRC
56
C10B
0.022μF
54
12
13
L8
0.22μH
C13C
0.1μF
D2
1SV251
R11
100kΩ R13A
1kΩ
C11
10pF
11
FM_RF_AGC
AFC
N_AGC
C10
10pF
10
+
-
SNC
52
C13
0.1μF
SUB_DEC.
Sepa_adj.
15
DIV.
48
C19
33kΩ
C16B
27pF
18
C16A
VCD2
4pF
SVC704
C15
0.022μF
L16
L_OSC
C17
3pF
17
16
RF_LOCAL
P_DEC.
FF
VT
19
10kΩ
R21
2.7kΩ
Signal Quality
C19
150pF
21
44
C21
0.22μF
20
PLL
A/D
D/A
LPF
FM_ON
SW
Phase
C18
1μF
45
C44
0.22μF
MPX_PLL
46
C45
1μF
R47
1MΩ C45B
0.47μF
47
C47
0.47μF
AFC_SW
38k<0
C16
2pF
State_DET
SD
R13B
330Ω
14
49
S MATRIX
M
P_Cancel
HCC
51
50
C51
C52
0.47μF 2200pF
N_GATE
53
N_SENS
R54
3kΩ
FM_DET.
Mute
FM_ANT
C8C
18pF
C8B
4pF
C8A
39pF
T10
MIX_IN
C55
1μF
C50
C49
0.015μF 0.015μF
L_OUT
C53
0.22μF
C54
0.47μF
55
R7
30kΩ VCD1
C7
FM_RF
1000pF
C8
C9
0.22μF 1000pF
C6
0.022μF
R6
470Ω
7
RF_DAC
B.V._BPF
ATT.
6
58
57
C57
2200pF
Q_CONT.
59
SMETER
R5
100kΩ
C4C
15pF
C4B
36pF
4
C4A
0.22μF
L_AM1
6.8μH
60
AM_DET.
AM_RF_AGC
3
C59
1μF
IF_LOCAL
FET1
CPM5905
C3
0.1μF
61
IF_AMP.
62
C60
C56
1μF
Phase_det
C63 C61
0.1μF 0.1μF
AM_IFIN2
IF_AGC
MUTE_CONT
MIX_OUT1
NOISE
AGC
C54
1μF
RF_VCC_8V
VREF_4.9V
AM_MIX_IN2
NC_IN
AM_ATT
AM_IFIN1
AM_MIX_IN1
DET_OUT
AM_RFAGC
MRC_IN
FM_RFDAC
AFC_OUT
CF3
CF_450k
FM_MIX_IN1
VSM_AC
AM_IFAGC
FM_RFAGC
Phase_det
FM_MIX_IN2
MRC_TIME
FM_ANTDAC
NC_MPX_VCC
RF_GND2
CHCC
VCO_GND
GND
OSC1
MPX_IN
FM_ANT_DR
R_OUT
OSC_VCC
19k<0
OSC2
R22
3.3kΩ
22
F2
42
41
RDS_LPF
C22B
1000pF
C22A
15000pF
23
3kΩ
24
DCMON
8V(15pin)
I2C_BUS
R41
3.3kΩ
C41B
68nF
QOUT
ST/SD
UL
8V
28 Q_OUT
27 ST_OUT
26 UL_IFEND_BUSY
25 F3
F3
RDDA
29 RD_DA
GND
SDA
SCK
RDCL
30 RD_CL
ST_IND
SDA
RESET
5V
31 S_DA
GND
C33
1μF
DGND
S_METER
TP34
SCK
8V
R32
10kΩ
C36B
C38
18pF
C39
18pF
32 S_CK
R31
10kΩ
33 RESET
CC_5V
34 BUS
10μF
C35
1μF
1μF
X1
20.5M
VREG_3V + C36
35 D_V
36
37 D_GND
38 XTAL_OUT
39 XTAL_IN
40 XTAL_GND
C41A
3.9nF
XTAL_OSC
RDS_DEC
43
LOGIC
S_METER
CPAM
AFC_C
VT
F1
CPFM
R_OUT L_OUT
FET_GND
5V
DC MONITOR
VSM_AC
connecter C
connecter A
LV25700PM
Application Circuits Example
No.A1709-67/68
LV25700PM
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PS No.A1709-68/68