MX929BP

更新时间： 2024-02-25 20:45:10

品牌	Logo	应用领域
CMLMICRO		调制解调器泵
页数	文件大小	规格书
51页	616K
描述
DATA BULLETIN 4-Level FSK Modem Data Pump

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MX929BP 数据手册

MX929B

COMMUNICATION SEMICONDUCTORS

DATA BULLETIN

4-Level FSK Modem Data Pump

PRELIMINARY INFORMATION

Features

Applications

xꢀ 4-Level Root Raised Cosine FSK Modulation

xꢀ Half Duplex, 4800 to 19.2kbps

xꢀ Increase Channel Bit Rate/Hz

xꢀ Full Data Packet Framing

xꢀ RD-LAP¥ Systems

xꢀ RCR STD-47 Systems

xꢀ Two Way Paging Systems

xꢀ Mobile Data Systems

xꢀ Wireless Telemetry

xꢀ DataTAC¥ Terminals

xꢀ Portable Wireless Data Equipment

xꢀ Impulse and NRZ Signal Modes

xꢀ Enhanced Performance in Noisy Conditions

xꢀ Error Detection and Error Correction

xꢀ Low Power 3.3V/5.0V Operation

MX929B

RADIO

HOST µC

DATA AND

CONTROL BUS

ANALOG TX

MODULATOR

MODEM

DATA

SYSTEM

APPLICATION

PROCESSING

DISCRIMINATOR

ANALOG RX

PUMP

The MX929B is a low voltage CMOS device containing all of the baseband signal processing and Medium

Access Control (MAC) protocol functions required for a high performance 4-level FSK Wireless Packet Data

Modem. It interfaces with the modem host PC and the radio modulation/demodulation circuits to deliver

reliable two-way transfer of the application data over a wireless link.

The MX929B assembles application data received from the host PC, adds forward error correction (FEC) and

error detection (CRC) information, and interleaves the result for burst-error protection. After automatically

adding symbol and frame sync codewords, the data packet is converted into filtered 4-level analog signals for

modulating the radio transmitter.

In receive mode, the MX929B performs the reverse function using the analog signals from the receiver

discriminator. After error correction and removal of the packet overhead, the recovered application data is

supplied to the host PC. CRC detected residual uncorrected data errors will be flagged. Readout of the SNR

value during receipt of a packet is also provided.

The MX929B uses data block sizes and FEC/CRC Algorithms that are compatible with RD-LAP¥ and

RCR STD-47 over-air-standards. The device is programmable to operate at standard bit rates from a wide

range of Xtal/clock frequencies.

The MX929B may be used with a 3.0V to 5.5V power supply and is available in the following package styles:

24-pin SSOP (MX929BDS), 24-pin SOIC (MX929BDW), and 24-pin PDIP (MX929BP).

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480171.003

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

12 3 4 5 6 7...51

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