AMBE2000 ETC, AMBE2000 Datasheet - Page 25

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

5.2.1 Formatted Input : Word 0 : Header
The decoder uses the header information to synchronize with the beginning of each 20 millisecond frame. this 16 bit word
MUST be 0x13EC.
5.2.2 Formatted Input : Word 1 : Power Control
Set the encoder to 0x00 in the 8-bit Power Control field of an output frame for normal use. For Power Down Mode, set this
value to 0x55. This causes the AMBE-2000 to enter low power mode. To exit low power mode, the device must be reset
through the hardware.
0x00
0x55
ID
Low Power Mode
Voice Data
Type
Word #
10
11
12
13
14
15
16
17
18
19
20
21
22
23
0
1
2
3
4
5
6
7
8
9
Table 5-A Formatted Input : ID Values Summary
Confidential Proprietary, Subject to Change
Figure 5-A Basic Formatted Input Format
Header always set to 0x13EC
Power Control (8bits)
Rate info 0
Rate info 1
Rate info 2
Rate info 3
Rate info 4
Unused in Input
Unused in Input
Unused in Input
DTMF Control – see Tables 5-E and 5-F
Control Word 2 – see Table 5-G
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
User’s Manual Version 3.0
This ID value instructs AMBE-2000™ to operate in normal fashion
When this mode is activated the AMBE-2000™ Vocoder Chip will go into
a mode which conserves power, where no voice packets are being
processed.
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Description
Control Word 1 (8 bits) – see Table 5-B
See Tables 5-C and 5-D
Description