User`s manual

AMBE-2000™ Vocoder Chip
User’s Manual Version 4.9
DVSI Confidential Proprietary, Subject to Change Page 64
Visit us at www.dvsinc.com
Compatible Mode Procedure Step 2.
The next packet should be identical to the packet described in Table 3.
Special Control Packet
Word # Value Description
0 0x13ec Header
1 0x0700 Special Control packet
2 0x0834 Special control data
3 0x0005 Special control data
4 0x11bf Special control data
5 0x0005 Special control data
6 0x0000 Must be 0x0000
7 0x0000 Must be 0x0000
8 0x0000 Must be 0x0000
9 0x0000 Must be 0x0000
10 0x0000 Must be 0x0000
11 0x0000 Must be 0x0000
12-23 Channel Data for AMBE® voice decoder
Table 3.
Compatible Mode Procedure Step 3.
After the packets detailed in Table 2 and Table 3 are sent into the AMBE-2000/2020™ Vocoder Chip the RIS bits in Control
Word 2 must be set to 0x3 for each subsequent packet. If the rate is changed or the device is reset, the above procedure (steps
1, 2 and 3) must be repeated.
Control Word 2 – (16-bits)
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Decoder Output Volume Control
Unused
0
Unused
0
VAD
Unused
0
SL EC RIS
Table 4.