DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released
DSB75_hd_v12
Page 73 of 96
2008-08-26
Function
Reference
Switch position 1
Switch position 3
S710
1)
S711
Disconnects a speaker connected to the
Lumberg connector X700 or X701
(audio interface 2)
Activates a speaker connected to the
Lumberg connector X700 or X701 (audio
interface 2)
S712
1)
S713
Disconnects a speaker connected to the
handset connector X502
(audio interface 1)
Activates a speaker connected to the
handset connector X502 (audio interface 1)
S714
1)
S715
Disconnects a microphone connected to
the Lumberg connector X700 or X701
(audio interface 2)
Activates a microphone connected to the
Lumberg connector X700 or X701 (audio
interface 2)
S716
1)
S717
Disconnects a microphone connected to
the handset connector X502
(audio interface 1)
Activates a microphone connected to the
handset connector X502 (audio interface 1)
S730
1)
Connects voltage VMIC to the microphone
feeding bridges
(necessary for using audio inputs)
Disconnects voltage VMIC
Audio (microphone) inputs at X502,700,701
doesn’t work
S731
1)
Connects analog ground AGND to the
microphone feeding bridges
(necessary for using audio inputs)
Disconnects analog ground AGND
Audio (microphone) inputs at X502, X700,
X701 does not work
1)
Set the switch to position 3 (disconnect state) using a separate customized audio circuit
connected to the pin headers X101, X102.