MSM6895 データシートの表示（PDF） - Oki Electric Industry

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MSM6895

Multi-Function PCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM6895/6896

TPAI, TPAO

The transmit preamplifier input and output.

TPAI is the input and TPAO is the output. Connect TPAI to the microphone of handset via an AC-

coupling capacitor if the DC offset appears at a transmit signal (offset from SGT). The transmit

path from TPAI to TPAO is always established regardless of processor control.

VSG

Signal ground level output.

The output level is equal to a half of the power supply voltage.

VSGC

Bypass capacitor connecting pin for signal ground level.

Insert a 0.1 mF capacitor with good higher frequency characteristic, between VSGC and VAG.

VA, VD

+5 V power supply.

VA is for an analog circuit and VD is for digital supply. Connect both VA and VD to the +5 V

analog path of the system.

CAI

CODEC analog output.

Connect CAI to T1O.

CAO

CODEC analog output.

Connect CAO to R1I via an AC-Coupling capacitor.

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