Siemens XT75 Dokumentacja Pobierz pdf (Strona 41)

XT65/XT75 Hardware Interface Overview

6.5 Pin Assignment and Signal Description

XT65_XT75_HO_v00.130 Page 41 of 67 2006-10-12

Confidential / Preliminary

Analog

Audio

interface

VMIC O V

min = 2.4V

typ = 2.5V

max = 2.6V

max

= 2mA

Microphone supply for customer

feeding circuits

EPP2 O 3.0Vpp differential typical @ 0dBm0

4.2Vpp differential maximal @

3.14dBm0

Measurement conditions:

Audio mode: 6

Outstep 3

No load

Minimum differential resp. single

ended load 27Ohms

The audio output can directly

operate a 32-Ohm-loudspeaker.

If unused keep pins open.

EPN2 O

EPP1 O 4.2Vpp (differential) typical @

0dBm0

6.0Vpp differential maximal @

3.14dBm0

Measurement conditions:

Audio mode: 5

Outstep 4

No load

Minimum differential resp. single

ended load 7.5Ohms

The audio output can directly

operate an 8-Ohm-loudspeaker.

If unused keep pins open.

EPN1 O

MICP1 I Differential Line Input Configuration.

Apply external bias of 1.5V at

MICN1

Full Scale Input Voltage: 1.6 Vpp

0dBm0 Input Voltage: 1.1 Vpp

Measurement conditions:

Audio mode: 5

^SNFI: 0,32767 => PGA = 0dB

Ri = 100 kOhm (typical)

Balanced or single ended micro-

phone or line input with external

feeding circuit (using VMIC and

AGND).

If unused keep pins open.

MICN1 I

MICP2 I Differential Line Input Configuration.

Apply external bias of 1.5V at

MICN2

Full Scale Input Voltage1.6 Vpp

0dBm0 Input Voltage1.1 Vpp

Measurement conditions:

Audio mode: 6

^SNFI: 0,32767 => PGA = 0dB

Ri = 100 kOhm (typical)

Balanced or single ended micro-

phone or line input with external

feeding circuit (using VMIC and

AGND) and accessory detection

circuit.

If unused keep pins open.

MICN2 I

AGND Analog Ground GND level for external audio cir-

cuits

Table 17: Signal description

Function Signal name IO Signal form and level Comment

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 57 58

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