Siemens ET7 Series Spezifikationen PDF herunterladen (Seite 35)

DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 35 of 94 29.09.2005

X122

S601

X602

X710

X700

S714

S715

S710

S711

V430V431

X506

X100

X503

X502

X501

X500

S307S305S303

S301

S300 S302

S304 S306

S713

S712

S717 S716

S730

S731

S240

X420

X421

S421

X701 (b

ottom side)

45 6 7

123

112

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 12.

Table 12: 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 Siemens 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.

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