Digital Voice Systems AMBE-20X0 HDK, Руководство пользователя

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AMBE-2x0™-HDK Development Board
User’s Manual
(Preliminary)
Page 8
DVSI Confidential Proprietary
Section 2 – Connectors, Test Points & Indicators
Handset
If a handset is used instead of the 4 wire interface, use a standard telephone handset (included in the
optional accessories kit) to connect to the RJ11 handset connector. Be sure that the handset cord is
less than a foot long (included in the optional accessories kit) when not stretched. This will help reduce
noise from being introduced into the voice signal. The AMBE-20x0™-HDK Development Board always
outputs the audio to both the 4-Wire and Handset output regardless of which voice source is selected.
Handset Header JP3
Pin Number Name
1 and 2 Connected internally to Ground
3 Speaker Out
4 Microphone In/DC Microphone Bias out
Table 4 Handset PinOut
RS-232 Connections
There are two RS-232 connection on the HDK board. (see photo) The top connector is the channel
output that can be used to communicate to another HDK board or to connect to an PC for recording or
playback to / from a file.
The MSP-430 has a master clock of 8 MHz. The auxiliary clock (for USART operation) operates at
1.048 MHz.
RS-232 Channel I / O
RS-232 Console Out