AMBE-3000™ Vocoder Chip Users Manual
Version 2.8, August, 2011
I/
O Management
5.1 Operating Modes
There are two modes (codec mode and packet mode) for the AMBE-3000™ vocoder chip. Both modes can take advantage of
the variety of interfaces available.
5.1.1 Codec mode
In codec mode the speech data I/O (to/from codec) is a serial stream of samples that uses either the SPI or the McBSP interface
and the channel data is configured into data packets that are sent across either the UART, parallel port, or McBSP (when not
used as the codec interface). When using codec mode, the speech and channel data use separate interfaces. Packets containing
channel data are sent and received every 20 ms.
Figure 16 Codec Mode (SPI Interface)
(Subject to Change) Page 35
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