Installation Instructions

SIM5216A _HD_V1.02 Hardware Design
SIM5216A _HD_V1.02 26.08.2010
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Table 12: Speaker Output Characteristics
Parameter Min Typ Max Unit
Quiescent
Current
6.2 mA
Output
power(1KHz)
500 mW
3.8.5 Programming characteristic
3.8.5.1 Setting Audio Parameters by AT Commands
The audio modes 1 to 3 can be temporarily adjusted according to the AT command parameters
listed in the table below. The audio parameters are set with the AT commands AT+CMICAMP1,
AT+SIDET, AT+CTXGAIN, AT+CRXGAIN, AT+CTXVOL, AT+CTXFTR, AT+CRXFTR as
we l l a s AT +C LV L, AT+ CVLV L, AT+ VM UTE , AT +M IC MUT, AT +C SD VC , an d AT +C PTONE.
For a model of how the parameters influence the audio signal path see Section 3.8.5.2.
Table 13: Audio parameters adjustable by AT command
Parameter Influence to Range Gain
range
Calculation AT command
micAmp1 MICP/MICN analogue
amplifier gain before ADC
0…1 0…24dB 2 steps AT+CMICAMP1
txVol Digital gain of input signal
after ADC
0,
1...65535
Mute,
-84...+12
dB
20 * log
(txVol/
16384)
AT+CTXVOL
txGain Digital gain of input signal
after summation of
sidetone
0,
1...65535
Mute,
-84...+12
dB
20 * log
(txGain/
16384)
AT+CTXGAIN
txFilter Input PCM 13-tap filter
parameters, 7 values
0...65535 --- MATLAB
calculate
AT+CTXFTR
rxGain Digital gain of output
signal after summation of
sidetone
0,
1...65535
Mute,
-84...+12
dB
20 * log
(rxGain/
16384)
AT+CRXGAIN
rxVol Digital Volume of output
signal after speech
decoder, before summation
of sidetone and DAC
-300…300 dbm -300…300d
bm
AT+CLVL
AT+CVLVL
AT+CRXVOL
stGain Digital attenuation of
sidetone
0, 1...65535 Mute,
-96...0dB
20 * log
(stGain/
16384) -12
AT+SIDET
rxFilter Output PCM 13-tap filter 0...65535 --- MATLAB AT+CRXFTR