AMBE2000 Datasheet, PDF (28/47 Pages) List of Unclassifed Manufacturers – VOCODER CHIP

AMBE-2000™ Vocoder Chip
User’s Manual Version 3.0
Table 5-F DTMF Codes for Digit Detect/ Generate
DTMF Code
0x80
0x84
0x88
0x81
0x85
0x89
0x82
0x86
0x8A
0x87
0x83
0x8B
0x8C
0x8D
0x8E
0x8F
0xff
DTMF Digit
1
2
3
4
5
6
7
8
9
0
*
#
A
B
C
D
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).
5.2.9 Formatted Input : Word 11 Control Word 2
Table 5-G Control Word 2 Format
Control_Word 2 – 16-bits (See Table 1-F)
Bit 15
14
13
12
11
10
9
8
7
6
5
4
3
2
Decoder Output Volume Control
Unused Unused
0
0
VAD
Unused
0
SL
EC
1
0
RIS
Rate Information Selector (RIS) :
Use these 2 bits to select which part(s) of the vocoder will be affected by the rate selection words.
Table 5-H Rate Information Selection Codes
value
0x0
0x1
0x2
0x3
Area Controlled
Encoder and Decoder
Encoder only
Decoder only
Neither Encoder nor Decoder
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