User`s manual

AMBE-3000™-HDK Development Board
User’s Manual
Version 1.1
Page 14
2BHDK Configuration
HDK Configuration
Digital Voice Systems, Inc.
The Speech Compression Specialists
Overview
The AMBE-3000™ Vocoder settings are determined by both the DIP switches and Jumper positions.
The Dipswitch positions are always read upon board power up or after the Reset Button is pressed.
Board Reset
When the AMBE-3000™ HDK reset switch is pressed the HDK goes through the following sequence:
1) The MSP is reset
2) The MSP resets the AMBE-3000™ Vocoder chip
3) The MSP takes the AMBE-3000™ Vocoder chip out of reset
4) The codec is controlled by AMBE-3000™ Vocoder chip. The AMBE-3000™ Vocoder chip
holds the codec in reset until the Codec Interface is activated.
Figure 10 Reset Switch
AMBE-3000™ Vocoder Chip Configuration via Dip-Switches
The hardware DIP switches allow the user to set one of 64 standard AMBE-3000™ Vocoder Chip rates
and configure the chips features. In order for a new setting to take effect, the Reset Switch must be
pressed or the power to the board cycled off/on.
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