Specifications

AirPrime Embedded Module Hardware Integration Guide
50 Proprietary and Confidential 2130114
Figure 4-2: MC5728V Audio system block
MC8775V/MC8790V/MC8791V/MC8792V/
MC8795V system block
Figure 4-3 on page 51 represents the MC8775V/ MC8790V/MC8791V/
MC8792V/MC8795V module’s audio system block, and includes the following
features:
• Module interconnects are shown on the left side of the diagram. The analog
audio interface uses the signals:
· MIC_P/MIC_N
· SPK_P/SPK_N
Note: Make sure the host
device includes DC
blocking capacitors on the
analog Audio In lines – the
module does not include
series capacitors.
• The digital PCM audio interface uses the signals:
· PCM_CLK
· PCM_DIN
· PCM_DOUT
· PCM_SYNC
• Dynamic ranges for each programmable gain stage are listed, with the
following constraints:
· MIC_AMP1 is programmable in 1.5 dB steps
· CodecSTGain, when set to the minimum setting, effectively mutes sidetone
in the module codec
• When PCM audio is selected, the RX DAC and TX ADC blocks are
bypassed—the external PCM codec controls transmit gain, receive gain, and
sidetone gain.
Note: Data mixing is not supported. If mixing of voice signal is required, it must be done by
the host processor.
Decoder
RX DAC
EncoderTX ADC
HPF &
Slope
HPF
Echo Cancellation
NS &
AAGC
Tx FIR
Rx FIR
13K CELP/
EV RC
Decoder
AAGC
13 bit A /D
13 bit D/A
CodecRxGain
RX_HPF_DIS_N
Codec STGain
CodecTxGain
TX_HPF_DIS_N
TX_SLOPE_FILT_DIS_N
MIC_A MP1
0 dB or +24 dB
nsSw itch TxPCMFilt
TxVolume
RxV olume
RxPCMFilt
25mW @ +3dBm0
RF Filter
33n
22p
PCM I/F
+12dB
to
-84dB
+12dB
to
-84dB
+12dB
to
-84dB
0dB
to
-96dB
+12dB
to
-84dB
SPK1N
SPK1P
MIC1P
MIC1N
13K CELP/
EV R C En c o d e r
DTMF
Encoder
DTMF Rx Gain
DTMF Tx Gain
DTMF
Decoder
Audio In
Audio Out
RF
Interface