AMBE2000 ETC, AMBE2000 Datasheet - Page 28

• Manufacturer Part Number: AMBE2000
• Description: VOCODER CHIP
• Manufacturer: ETC

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).
5.2.9 Formatted Input : Word 11 Control Word 2
Rate Information Selector (RIS) :
Use these 2 bits to select which part(s) of the vocoder will be affected by the rate selection words.
Bit 15
14
Decoder Output Volume Control
13
Table 5-G Control Word 2 Format
12
Table 5-F DTMF Codes for Digit Detect/ Generate
Table 5-H Rate Information Selection Codes
11
Confidential Proprietary, Subject to Change
Control_Word 2 – 16-bits (See Table 1-F)
0x0
0x1
0x2
0x3
value
10
User’s Manual Version 3.0
Encoder and Decoder
Encoder only
Decoder only
Neither Encoder nor Decoder
DTMF Code
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9
0x80
0x84
0x88
0x81
0x85
0x89
0x82
0x86
0x8A
0x87
0x83
0x8B
0x8C
0x8D
0x8E
0x8F
0xff
Area Controlled
8
page 28
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Unused
DTMF Digit
7
0
deactivate
#
A
B
C
D
1
2
3
4
5
6
7
8
9
0
*
Unused
6
0
VAD
5
Unused
4
0
SL
3
EC
2
1
RIS
0