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Mobile FM Multiplex Broadcast (DARC System)
Mobile FM Multiplex Broadcast (DARC System)
Receiver IC
Receiver IC
LC72711W
LC72711W
Overview
The LC72711W is a data demodulation IC for the reception of mobile FM multiplex broadcasts in the DARC
system.
The LC72711W includes a bandpass filter for the extraction of the DARC signal from the FM baseband.
This IC is optimal for worldwide FM multiplex products since it supports all of the FM multiplex frame structures
(methods A, A', B, and C) in the ITU-R recommendations.
The LC72711W and LC72711LW support both parallel connection and CCB serial interface in place of the CPU
interface provided by the LC72709E.
Functions
Adjustment-free SCF based 76 kHz bandpass filter
Supports all FM multiplex frame structures (methods A, A', B, and C) under CPU control
MSK delay detection circuit using a 1T delay
Error correction function using a 2T delay (in the MSK detection stage)
Digital PLL based clock regeneration circuit
Shift register type 1T and 2T delay circuits
Block and frame synchronization detection circuits
Function for setting the allowable BIC error count and synchronization protection count
Error correction using (272,190) codes
Layer 4 CRC code checking circuit
Includes the frame memory and memory control circuit required for vertical correction
7.2 MHz crystal oscillator circuit
Two power saving modes (standby and EC stop modes)
Either a CPU parallel interface (DMA) or a CCB serial interface can be used
Supply voltage: 4.5 to 5.5 V
Package: SQFP64 (10
10 mm)
The DARC (Data Radio Channel) FM multiplex broadcast technology was developed by NHK
(Japan Broadcasting Corporation).
DARC is a registered trademark of NHK Engineering Services, Inc. (NHK-ES).
A separate contract with NHK-ES is required for the manufacturer or sale of electronic
equipment that uses DARC technology.
The logo shown here may be used with electronic equipment that uses DARC technology.
Block Diagram
Vddd
LPF
Vssd
1T delay
Clock
regeneration
STNBY
2T delay
RST
7.2MHz
XOUT
LPF
XIN
Vref
Antialiasing
76kHz
MPXIN
filter
BPF
(SCF)
Vdda
Vref
Vssa
63 Car Audio
:CCB is SANYO's original bus format.
All bus addresses are managed by
SANYO for this format.
Error
Synchronization
Timing
correction
regeneration
control
Layer 2 CRC
PN
MSK
decoding
correction
Data
Address
Memory array
Output control (CPU interface) and
layer 4 CRC checking circuit
Mobile FM Multiplex Broadcast (DARC System)
Mobile FM Multiplex Broadcast (DARC System)
Receiver IC
Receiver IC
LC72711LW
LC72711LW
Overview
The LC72711LW is a data demodulation IC for the reception of mobile FM multiplex broadcasts in the DARC
system.
The LC72711LW includes a bandpass filter for the extraction of the DARC signal from the FM baseband.
This IC is optimal for worldwide FM multiplex products since it supports all of the FM multiplex frame structures
(methods A, A', B, and C) in the ITU-R recommendations.
The LC72711W and LC72711LW support both parallel connection and CCB serial interface in place of the CPU
interface provided by the LC72709E.
Functions
Adjustment-free SCF based 76 kHz bandpass filter
Supports all FM multiplex frame structures (methods A, A', B, and C) under CPU control
MSK delay detection circuit using a 1T delay
Error correction function using a 2T delay (in the MSK detection stage)
Digital PLL based clock regeneration circuit
Shift register type 1T and 2T delay circuits
Block and frame synchronization detection circuits
Function for setting the allowable BIC error count and synchronization protection count
Error correction using (272,190) codes
Layer 4 CRC code checking circuit
Includes the frame memory and memory control circuit required for vertical correction
7.2 MHz crystal oscillator circuit
Two power saving modes (standby and EC stop modes)
Either a CPU parallel interface (DMA) or a CCB serial interface can be used
Supply voltage: 2.7 to 3.6 V
Package: SQFP64 (10
10 mm)
The DARC (Data Radio Channel) FM multiplex broadcast technology was developed by NHK
(Japan Broadcasting Corporation).
DARC is a registered trademark of NHK Engineering Services, Inc. (NHK-ES).
A separate contract with NHK-ES is required for the manufacturer or sale of electronic
equipment that uses DARC technology.
The logo shown here may be used with electronic equipment that uses DARC technology.
Block Diagram
Vddd
LPF
Vssd
1T delay
Clock
regeneration
STNBY
2T delay
RST
7.2MHz
XOUT
LPF
correction
XIN
Vref
76kHz
Antialiasing
MPXIN
filter
BPF
(SCF)
Output control (CPU interface) and
Vdda
Vref
Vssa
:CCB is SANYO's original bus format.
All bus addresses are managed by
SANYO for this format.
Error
Synchronization
Timing
correction
regeneration
control
Layer 2 CRC
PN
MSK
decoding
Data
Address
Memory array
layer 4 CRC checking circuit
64 Car Audio
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