MSM7503 Просмотр технического описания (PDF) - Oki Electric Industry

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MSM7503

Multi-Function PCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7503

PIN AND FUNCTIONAL DESCRIPTIONS

LA, LB

General latch outputs for external control.

Statuses of these outputs are controlled via the processor interface. Refer to the description of the

control data for details. These outputs provide the capability to drive one TTL.

DG

Digital Ground.

DG is separated from the analog ground AG inside the device. But, DG should be connected as

close to the AG pin on PCB as possible.

AG

Analog Ground.

SA0

Sounder (calling tone) driving outputs.

Through processor control, the calling tone volume is selectable from 4 levels and one of six tone

combinations is selectable. Initially, the calling tone volume is set at a maximum and the tone

combination is set at a 16 Hz Wamble tone by a combination of 1 kHz and 1.3 kHz.

The SA0 outputs pulse waveforms using DG as a reference potential.

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