ZL38003

Data Sheet

5

Zarlink Semiconductor Inc.

Figure 3 - Block Diagram

Mic

Detect

Electret

Bias

u/A

Law

u/A

Law

G.712

Filtering

Sidetone

Cross-Point

Voice

Serial PCM

Interface

Control for companding mode, RX gain control(s), sidetone

level, RX hi-pass filter, cross-point, muting, electret biasing,

microphone pre-amp and gain, PLL

4

Serial

uPort

4

D

A

C

A

D

C

u/A

Law

u/A

Law

G.712

Filtering

Sidetone

D

A

C

A

D

C

Mic

Detect

Electret

Bias

Electret

Bias

VREF

PLL

SYSCLK

VREF

RESETB

AUXTONE

Codec #1

Codec #0

Data

Data

Data

Data

Status