AMBE-2000 Digital Voice Systems, Inc., AMBE-2000 Datasheet - Page 22

• Manufacturer Part Number: AMBE-2000
• Description: 2.0 - 9.6 KBPS Single ic For Toll-quality, Low Data Rate, Real Time Speech Compression
• Manufacturer: Digital Voice Systems, Inc.

4.2
The hardware interface to the Channel Interface is configured as a serial interface based exclusively on the hardware settings of
CHAN_SEL [1-0]. See Table 4-A.
All transfers occur through a serial port. The serial port inputs and outputs a 16 bit word for every write and read strobe signal
respectively. Serial mode can be framed or unframed. Within the unframed mode, the data is input and output in 16 bits
words still but with only 1 to 4 voice data bits carried within each word. These four configurations can be seen in Table 4-B.
See section 4.3 for all the details on the serial interface.
Visit us at
DVSI Confidential Proprietary, Subject to Change
Serial Configuration Selection
www.dvsinc.com
Table 4-A Channel Interface Selection Table
Table 4-B Unframed Bit per Word Selection Table
AMBE-2000™ Vocoder Chip
Active Unframed
User’s Manual Version 4.0
Active Framed
Data Bits
per Word
of Voice
Number
Port Type
Unframed
Passive
Framed
Passive
1
2
3
4
Select Pins
0
0
1
1
Interface
Select Pins
0
0
1
1
Interface
0
1
0
1
0
1
0
1
Page 22