msm9555gs-2k Oki Semiconductor, msm9555gs-2k Datasheet

msm9555gs-2k

Manufacturer Part Number

msm9555gs-2k

Description

Lsi Devices For Fm Multiplex Data Demodulation

Manufacturer

Oki Semiconductor

Datasheet

1.MSM9555GS-2K.pdf (7 pages)

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¡ Semiconductor

MSM9554/MSM9555

LSI Devices for FM Multiplex Data Demodulation

GENERAL DESCRIPTION

The MSM9554 and MSM9555 are LSI devices which demodulate FM character multiplex signals in

the DARC (DAta Radio Channel)

format to acquire digital data. The MSM9554 and MSM9555

operate on 5V and 3V, respectively. In the DARC format, baseband signals at ordinary FM

broadcasting frequencies are multiplexed with 16k-bps digital data which are L-MSK-modulated at

76kHz.

Each of the MSM9554 and MSM9555 has a bandpass filter consisting of SCF, frame synchroniza-

tion circuit, and error correction circuit, on a single chip.

So, a system for acquisition of digital data can be easily constructed by externally mounting an FM

receiver tuner, microcontroller for control, and memory for temporary storage of data.

The MSM9554 and MSM9555 have a simple configuration, and are equipped with only necessary

functions. By making changes to software for the external microcontroller, the MSM9554 and

MSM9555 can meet the various requirements of FM multiplex broadcasting services which will be

offered in future.

These devices are best suited to the car radios and car navigation systems supporting VICSs (Vehicle

Information and Communication System)

that have been serviced since Aprit, 1996.

*1 DARC is a registered trademark of NHK ENGINEERING SERVICES, INC.

Note that a contract needs to be made with NHK Engineering Service if a manufacturer produces/

sells electronic equipment utilizing the DARC technology.

*2 If samples or detail documents are to be provided, contracts with VICS center are reqired

beforehand.

FEATURES

• Built-in discrambler supporting VICS

• Pin compatible with MSM9552/MSM9553

• Built-in bandpass filter (SCF)

• Built-in timer internal to block

• Built-in block synchronization circuit and frame synchronization circuit

• Setting of the number of synchronization protecting stages

• Regeneration of data clocks by digital PLL

• 1T delay detection

• Built-in error correction circuit

• Built-in layer 4 and layer 2 CRC check circuit

• Microcontroller parallel interface

• Clock output for external devices (64kHz to 8.192MHz selectable)

• International standard frame format

• Power source:

5V (MSM9554), 3V (MSM9555)

• Package

44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name: MSM9554GS-2K/MSM9555GS-2K)

Related parts for msm9555gs-2k

msm9555gs-2k Summary of contents

Page 1

... Clock output for external devices (64kHz to 8.192MHz selectable) • International standard frame format • Power source: 5V (MSM9554), 3V (MSM9555) • Package 44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name: MSM9554GS-2K/MSM9555GS-2K) format to acquire digital data. The MSM9554 and MSM9555 *2 that have been serviced since Aprit, 1996. MSM9554/MSM9555 ...

Page 2

Variable BPF A gain IN LPF (SCF) AMP Vref SG Filter LSI internal clock D DB2 Q WR31 CK 1T delay CLR DV DD Frequency divider Delay Detection XTAL2 XTAL1 XOUTC XOUT Limitter + Clock regeneration – PN descrambler Data ...

Page 3

Semiconductor PIN CONFIGURATION (TOP VIEW) 44 MON 1 ADETIN AV DD AGND XOUTC MOUT0 MOUT1 MOUT2 MOUT3 Note: Leave the NC pins open. 44-Pin Plastic QFP MSM9554/MSM9555 A0 33 XOUT CS XTAL2 ...

Page 4

MSM9554/MSM9555 PIN DESCRIPTION Function Pin Symbol WR Micro- 16 controller RD 18 interface INT CLR DB0 to DB7 Tuner interface 5 SG Analog 1 ...

Page 5

Semiconductor ABSOLUTE MAXIMUM RATINGS (MSM9554) Parameter Symbol Power supply voltage AV DV Input voltage V Output voltage V Maximum power dissipation P Storage temperature T STG RECOMMENDED OPERATING CONDITIONS (MSM9554) Parameter Symbol Power supply voltage AV DV Crystal frequency ...

Page 6

MSM9554/MSM9555 ABSOLUTE MAXIMUM RATINGS (MSM9555) Parameter Symbol Power supply voltage AV DV Input voltage V Output voltage V Maximum power dissipation P Storage temperature T STG RECOMMENDED OPERATING CONDITIONS (MSM9555) Parameter Symbol Power supply voltage AV DV Crystal frequency f ...

Page 7

MSM9554 or MSM9555 8 bit FM multiplex FM data demodulation tuner device PLL MCU Keys Font SRAM Display ROM ...

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