AS3502 datasheet(18/29 Pages) AMSCO

Il numero della parte	AS3502

Spiegazioni elettronici	13-BIT LINEAR FEATURE CODEC WITH ANALOGUE FRONTEND

PDF	29 Pages

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Produttore elettronici	AMSCO [ams AG]

Homepage	http://www.ams.com

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18 / 29 page

REV. M

Page 18

September 1998

AS3502

13) VOLUME CONTROL REGISTER 2

This register contains the remaining two bits of the second frequency coefficient, and coarse and fine tone volume

control data for the receive direction.

Name

V23

V22

V21

V20

F29

F28

Default

Bit No

Symbol

Name and Description

D5-D3

V23-V21

Receive Tone Coarse Volume Control ( V2C)

V23

V22

V21

Attenuation

- 10 dB

- 16 dB

- 22 dB

- 28 dB

- 34 dB

- 40 dB

V20

Sine Tone Fine Volume Control (V2F)

V20

Attenuation

0 dB

- 2.5 dB

In transmit direction the sineoutput value depends on V2F and DGX:

VOUTSINE = 3.8 dBm + V2F + DGX (dBm0)

VOUTDTMF ROW TONE = -2.2dBm + DGX (dBm0)

VOUTDTMFCOLUMN TONE = -4.7dBm + DGX (dBm0)

In receive direction the sine output value on earpiece and speaker depends on V2C, V1

and AGR:

VOUTEP= 3.8 dBm + V2C + V2F+ AGR (dBm)

VOUTSP= 3.8 dBm + V2C + V2F+ 3dB (dBm)

D1-D0

F29-F28

These bits are the two most significant bits of the 10-bit frequency coefficient.

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