ZL38070GBG datasheet(2/51 Pages) ZARLINK

Part #	ZL38070GBG

Description	256 Channel Voice Echo Canceller

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Manufacturer	ZARLINK [Zarlink Semiconductor Inc]

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ZL38070

Data Sheet

2

Zarlink Semiconductor Inc.

Description

The ZL38070 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation

conforming to ITU-T G.168 requirements. The ZL38070 architecture contains 128 groups of two echo cancellers

(ECA and ECB) which can be configured to provide two channels of 64 milliseconds or one channel of

128 milliseconds echo cancellation. This provides 256 channels of 64 milliseconds to 128 channels of

128 milliseconds echo cancellation or any combination of the two configurations. The ZL38070 supports ITU-T

G.165 and G.164 tone disable requirements.

Figure 2 - Single Echo Voice Processor (EVP) Overview

RESET

Rout

IC0

Sout

DS CS R/W A12-A0 DTA D7-D0

Echo Canceller Pool

VSS

VDD1 (3.3V)

TDI TDO TCK TRST

TMS

Rin

IRQ

C4i

F0i

MCLK

ODE

Sin

Fsel

Test Port

Microprocessor Interface

Timing

Unit

Serial

to

Parallel

to

Serial

PLL

Group 0

ECA/ECB

Group 4

ECA/ECB

Group 8

ECA/ECB

Group 12

ECA/ECB

Group 1

ECA/ECB

Group 5

ECA/ECB

Group 9

ECA/ECB

Group 13

ECA/ECB

Group 2

ECA/ECB

Group 6

ECA/ECB

Group 10

ECA/ECB

Group 14

ECA/ECB

Group 3

ECA/ECB

Group 7

ECA/ECB

Group 11

ECA/ECB

Group 15

ECA/ECB

Note:

Refer to Figure 4

for EVP block

diagram

VDD2 (1.8V)

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