AMBE2000 datasheet(32/47 Pages) ETC

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AMBE-2000™ Vocoder Chip

User’s Manual Version 3.0

page 32

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Table 5-M DTMF Codes for Digit Detect/ Generate

DTMF Code

DTMF Digit

0x80

0x84

0x88

0x81

0x85

0x89

0x82

0x86

0x8A

0x87

0x83

0x8B

0x8C

0x8D

0x8E

0x8F

0xff

deactivate

To deactivate the Digit Detect/Genetrate function, set the DTMF Code to 0xff. Dial, ring and busy tones are standard North

American call progress tones.

DTMF Amplitude

The DTMF Amplitude runs from 3 to –60 dBm0. This value is a signed bite (example: 0x03 = 3, 0x00 = 0, 0xC4 = -60).

5.3.7 Formatted Output : Word 11 :Control Word 2

Table 5-N Control Word 2 Format

Control_Word 2 – 16-bits (See Table 1-A)

Bit 15

Decoder Output Volume Control

Unused

RIS

Rate Information Selector (RIS) :

This field is used to indicate which part of the device is affected by words 2-6, the rate control words.

Table 5-O Rate Information Selection Codes

value

Area Controlled

0x0

Encoder and Decoder

0x1

Encoder only

0x2

Decoder only

0x3

Neither Encoder nor Decoder

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