DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released
DSB75_hd_v12
Page 37 of 96
2008-08-26
X122
S601
X602
X710
X700
S714
S715
S710
S711
V430
V431
X506
X100
X503
X502
X501
X500
S307
S305
S303
S301
S300 S302 S304 S306
S713 S712
S717 S716
S730
S731
S240
X4
20
X
421
S4
2
1
X701 (bottom side)
4 5 6
7
1 2 3
8
1
8
1 3
2 4
1 1
1
1
1
3
1
1
5
1
12
Figure 15: Location of the audio connectors and switches
3.6.1
Audio Interface 1 (Handset)
This balanced interface has been optimized for use with the Votronic handset supplied with
the DSB75.
The Votronic handset is a passive handset. Power supply for its microphone is provided by
the DSB75.
The handset connects to the 4-pin Western jack X502. The pin assignment of the X502 jack
is shown in Table 14.
Table 14: Pin assignment of handset audio interface 1 (X502)
Signal name
Pin
I/O
Description
MICN
1
I
Microphone inverted
EPN
2
O
Loudspeaker inverted
EPP
3
O
Loudspeaker not inverted
MICP
4
I
Microphone not inverted
The Votronic handset is the reference handset used with the DSB75. Acoustic approval of
the DSB75 module applies to the reference configuration comprising the Votronic handset
and the DSB75. GSM applications that incorporate audio devices other than the reference
handset must be submitted for additional type approval.
