MSM7503

更新时间： 2024-11-21 04:14:31

品牌	Logo	应用领域
冲电气 - OKI		解码器编解码器 PC
页数	文件大小	规格书
41页	239K
描述
Multi-Function PCM CODEC

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数据手册

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MSM7503 数据手册

E2U0024-16-X2

This version: Jan. 1998

Previous version: Nov. 1996

¡ Semiconductor

MSM7503

¡ Semiconductor

MSM7503

Multi-Function PCM CODEC

GENERAL DESCRIPTION

The MSM7503 is a high performance, low power CODEC LSI device integrating a 2-wire time

division transmission (ping-pong transmission) interface function and has a basic function of

man-machine interface to that of the MSM7502.

The MSM7503 operates from single 5 V power supply and is ideal for digital telephone terminals

such as pushbutton telephone sets and digital PBXs.

The MSM7503 ping-pong transmission interface supports a bidirectional communication of up

to 800 m long on the 2-wire twisted pair line, and can send and receive voice data at 64 kbps and

control data at 16 kbps.

The man-machine interface consists of analog speech path, key-scanner, tone generators,

CODEC meeting the m/A companding law, and processor interface, which are controlled via 8-

bit data buses.

FEATURES

• Single +5 V Power Supply

• Low Power Dissipation

Power ON Mode

Power Down Mode

: 50 mW Typ. 100 mW Max.

: 15 mW Typ. 30 mW Max.

• Pin-Pong Transmission

: Burst of 8 kHz, Transmission of 256 kbps,

AMI coding, 2-wire time division transmission

: Transmit Start bit (1 bit), K-bit (1 bit),

Control bit (2 bits), Voice bit (8 bits),

DCbalancebit(1bit), totalling13bits

Receive Sync bit (4 bits), K-bit (1 bit),

Control bit (2 bits), Voice bit (8 bits),

DCbalancebit(1bit), totalling16bits

• Transmission data configuration

• Control Data Interface supports synchronous and asynchronous communications

• Built-in Power-on Reset by the power supply voltage monitoring

• Output of the ping-pong transmission monitoring signal

• CODEC complied by the ITU-T companding law

• Calling Tone Interval

: Controlled by processor

• Calling Tone Combination

• Calling Tone Volume

• Ringing Tone Interval

: Controlled by processor, 6 modes

: Controlled by processor, 4 modes

: Controlled by processor

• Ringing Tone Frequency

• Ringing Tone Level

: Controlled by processor, 6 modes

: Controlled by processor, 4 levels

• Built-in PB Tone Generator

• Built-in Speech path Control Switches

• General Latch Output for External Control : 2 bits

• Watch-dog Timer : 500 ms

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