LV2285VB_11 Datasheet, PDF (8/11 Pages) Sanyo Semicon Device – FM transmitter IC with Stereo Modulation, Auto Sleep Function

I²C Bus Definition
LV2285VB
Table 1 : I²C Register map
Bit
Name
Byte
MSB *1
ACK
LSB
Address Byte
AD7
AD6
AD5
AD4
AD3
AD2
AD1
R/W
1
A
1
1
0
1
0
0
0
0
Control Byte 1
P10
P9
P8
P7
P6
P5
P4
P3
2
A
0
1
1
1
1
0
1
0
Control Byte 2
P2
P1
P0
RES2
ST
PILOT
EN
MUTE
3
A
1
0
0
0
1
1
0
0
Control Byte 3
RES1
RES0
RF2
RF1
RF0
ATT2
ATT1
ATT0
4
A
*2
*2
0
1
1
0
1
0
Control Byte 4
R6
R5
R4
R3
R2
R1
R0
TEST
5
A
1
0
1
0
0
0
0
0
*1 : MSB is transmitted first.
*2 : Don’t care
Table 2 : I²C Register map description
Bit
AD[7:0]
R/W
A
P[10:0]
Name
Address bit
Read / Write
Acknowledge
Programmable counter
Initial
1101 000
0
0111 1010 100
RES2
ST
Reserved bit
MONO / Stereo
0
1 (stereo)
PILOT
Pilot tone output
1
EN
Enable
0 (Standby)
MUTE
Mute
0
RES[1:0]
Reserved bits
00
RF[2:0]
RF output adjustment
011
ATT[2:0]
Audio attenuator
010
R[6:0]
Reference counter
1010 000
TEST
Reserved bit
0
LV2285VB I²C 7bit address
Write mode only
Description
11bit Programmable counter.
RF frequency=(P10 × 2¹⁰ + P9 × 2⁹ + ^... P1 × 2¹ + P0) × 100kHz
Stereo modulation control.
“ST”=”0” Monaural mode, “ST”=”1” : Stereo mode.
Pilot signal control.
“PILOT”=”0” : No pilot, “PILOT”=”1” : with Pilot
Internal LDO control.
“EN”=”1” : Active, “EN”=”0” : Standby
Audio mute control.
“MUTE”=”1” : Enable, “MUTE”=”0” : Disable
RF output level control.
RF[2:0]=”111” : Maximum, RF[2:0]=”000” : Minimum
This attenuator is used to adjust FM modulation level.”111” is Minimum (0dB).”000”
is Maximum (19dB). See Audio and MPX Block specification.
7bit reference counter. Reference frequency should be set 100kHz.
{Crystal oscillator frequency(Pin 16)}/{(R6 × 2⁶ + R5 × 2^5…+R1 × 2¹ + R0) × 2} = 100kHz
No.A1494-8/11