HSPA/UMTS/GSM/GPRS Module Series
UG96&UG95&M95 R2.0 Compatible Design
UG96&UG95&M95 R2.0_Compatible_Design 28 / 42
4.9. Audio Interfaces
M95 R2.0 provides two analogy input channels, two analogy output channels and one PCM interface,
while UG96/UG95 only provides one PCM audio interface.
The following figure shows the compatible reference design of audio interfaces. For more details, please
refer to document [1], [2] and [3].
MIC2P (M95 R2.0)
MIC2N (M95 R2.0)
MIC1P (M95 R2.0)
MIC1N (M95 R2.0)
SPK1P (M95 R2.0)
SPK1N (M95 R2.0)
LOUDSPKP (M95 R2.0)
LOUDSPKN (M95 R2.0)
PCM_CLK (UG96/UG95/M95 R2.0)
PCM_SYNC (UG96/UG95/M95 R2.0)
PCM_DIN (UG96/UG95/M95 R2.0)
PCM_DOUT (UG96/UG95/M95 R2.0)
CODEC
Audio
Interface
Module
Handset
0R
0R
0R
0R
0R
0R
0R
0R
0R
0R
AGND (M95 R2.0)
GND (UG96/UG95/M95 R2.0)
GND
AGND
0R
0R
MIC
Speaker
Figure 17: Reference Design of Audio Interfaces
For more details of audio interface compatible design, please refer to document [4].
4.10. RF Interface
RF_ANT is a compatible pin among UG96/UG95 and M95 R2.0. The impedance of the RF interface is
50Ω.
In order to achieve better RF performance, it is recommended to reserve a π-type matching circuit
(R1/C1/C2) and place it close to the antenna. The capacitors (C1/C2) are not mounted and a 0Ω resistor
is mounted on R1 by default. A reference design for RF antenna interface is shown as below.
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