Installation Instructions

SIM5215A _HD_V1.02 Hardware Design
SIM5215A _HD_V1.02 26.08.2010
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parameters, 7 values calculate
NOTE: if you want to better experience on audio, you should modify these parameters for your
own electronic and mechanical design of audio part. The 13-tap filter parameter could be
debugged and calculated by MATLAB.
3.8.5.2 Audio Programming Model
The audio programming model shows how the signal path can be influenced by varying AT
command parameters. Parameters <micAmp>, <txGain> , <txVol>, <txFilter>,<rxGain>,
<stGain> ,<rxVol> and <rxFilter> can be adjusted with corresponding AT commands. For more
information on the AT commands and parameters see Section 3.8.5.1.
NOTE: Please reference document [1] for detailed information of each AT command.
Figure 19: Audio programming model
Note: There is no AT+CMIC in SIM5215A, because there is only one analogue hardware
amplifier which is supported by AT+CMICAMP1.
3.8.5.3 Audio characteristics
The electrical characteristics of the voice band part depend on the current audio mode (device
number) set with the AT+CSDVC command. All values are noted for default gains.
Table 14: Audio Characteristics
Audio Device no.
AT+CSDVC=
1 2 3
Name Handset Headset Speaker phone