Sony Ericsson Mobile Communications Inc. TR-505-A2 Manuale Utente
DM15/25 Integrator’s Manual
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Pin
DM-15/DM-25
Description
3
AFMS
Audio Output From Module
6
ATMS
Audio Input to Module
The factory default audio settings are presented in the following table. Refer to AT*NAUD
Module audio output
Output Impedance (active state)
Output Impedance (inactive state)
Output Impedance (pwr down state)
Drive capacity into 50
Output Impedance (active state)
Output Impedance (inactive state)
Output Impedance (pwr down state)
Drive capacity into 50
Ω
Drive capacity into 5 k
Ω
(0.3 – 3.5 kHz)
Zout < 10
Zout < 10
Ω
in series with
≥
3.3 uF
(-20%)
Zout < 10
Zout < 10
Ω
to VDD/2
Zout > 30 k
Ω
1.1 V
P-P
min.
2.0 V
P-P
min./ 4.0 V
P-P
max.
External Device audio input Input
Impedance
Impedance
Zin > 50
Ω
Volume control
±
12 dB from nominal > - 40 dB
(mute)
AFMS
Levels to external audio input at mid
volume
volume
28 mVrms nominal 450 mVrms
max.
max.
All sources must be AC coupled except for a microphone device. MIC
should be DC coupled in order for module to supply DC power to
microphone.
External audio source
Output impedance (active state)
Output impedance (inactive state)
should be DC coupled in order for module to supply DC power to
microphone.
External audio source
Output impedance (active state)
Output impedance (inactive state)
Zout
≤
100
Ω
Zout > 10 k
Module audio input
Input impedance
Output DC level unloaded for external
MIC
Input impedance
Output DC level unloaded for external
MIC
Zin > 2 k
Ω
2.0 V min.
Levels from external audio source
(default)
(default)
45 mVrms nominal 340 mVrms
max.
max.
ATMS
Audio input signal is amplified an
additional 32 db and a DC bias is
provided to the microphone when using
the AT*NAUD command for HF mode.
additional 32 db and a DC bias is
provided to the microphone when using
the AT*NAUD command for HF mode.
1.5 mVrms nominal
4.1.4.2 Digital Audio
The DM-15/DM-25 provides digital audio capability over the system connector. The digital audio
signals enable the connection of a digital audio source. The receiver is bypassing the analog audio
processing functions performed within the ME. The digital audio interface includes the following
PCM signals:
signals enable the connection of a digital audio source. The receiver is bypassing the analog audio
processing functions performed within the ME. The digital audio interface includes the following
PCM signals: