Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
© 2003 All rights reserved
Page:
45
/
93
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written
agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son
autorisation préalable.
2.6.6.1.3 Auxiliary Microphone Inputs (MIC1)
MIC1 inputs do not include internal bias, making these inputs the standard ones
for an external headset or a hands-free kit, connected either in differential or
single-ended mode.
Note
: to get a good TDMA noise filtering for the biasing of MIC1, a
recommended solution is the use of an external supply instead of using VCC (pin
60) provided by the WISMO Quik Q2501 module.
To use these inputs with an electret microphone, bias has to be generated
outside the WISMO Quik Q2501 module according to the characteristics of this
electret microphone.
AC coupling is already embedded in the module.
Pin description
Signal Pin # I/O I/O type Description
MIC1P 62 I Analog Microphone 1 positive input
MIC1N 64 I Analog Microphone 1 negative input
2.6.6.2 Speaker outputs
2.6.6.2.1 General description
These outputs are differential and the output power can be adjusted by step of
2 dB.
Outputs can be directly connected to a speaker.
The gain of the speaker outputs is internally adjusted and can be tuned using an
AT command (refer to AT commands documentation [4]).
2.6.6.2.2 Main Speaker Outputs (SPK2)
Pin description
Signal Pin # I/O I/O type Description
SPK2P 65 O Analog Speaker 2 positive output
SPK2N 67 O Analog Speaker 2 negative output
2.6.6.2.3 Auxiliary Speaker Outputs (SPK1)
Pin description
Signal Pin # I/O I/O type Description
SPK1P 61 O Analog Speaker 1 positive output
SPK1N 63 O Analog Speaker 1 negative output