User's Manual

LISA-U1/LISA-H1 series - System Integration Manual
3G.G2-HW-10002-2 Advance Information System description
Page 70 of 116
LISA-U120/U130
C1
C2
54
SPK_N
53
SPK_P
GND
40
MIC_P
GND
Negative Analog IN
Positive Analog IN
Negative Analog OUT
Positive Analog OUT
Audio Device
Reference
Reference
39
MIC_N
LISA-U120/U130
54
SPK_N
53
SPK_P
GND
40
MIC_P
GND
Analog IN
Audio Device
Reference
Reference
39
MIC_N
Analog OUT
C3
C4
R2
R1
R4
R3
Figure 41: Application circuits to connect the module to audio devices with proper differential or single-ended input/output
Reference
Description
Part Number - Manufacturer
C1, C2, C3, C4
10 µF Capacitor X5R 0603 5% 6.3 V
GRM188R60J106M - Murata
R1, R3
0 Ω Resistor 0402 5% 0.1 W
RC0402JR-070RL - Yageo Phycomp
R2, R4
Not populated
Table 30: Connection to an Audio Device
1.11.2 Digital Audio interface
LISA-U120 and LISA-U130 modules support a bidirectional 4-wire I
2
S digital audio interface. The module acts as
master only. The applicable pins are described in Table 31:
Name
Description
Remarks
I2S_WA
I
2
S word alignment
Module output (master)
I2S_TXD
I
2
S transmit data
Module output
I2S_CLK
I
2
S clock
Module output (master)
I2S_RXD
I
2
S receive data
Module input
Table 31: I
2
S interface pins
The I
2
S interface pins ESD rating is 1 kV (contact discharge). A higher protection level could be required
if the lines are externally accessible on the application board. A higher protection level can be achieved
mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) on the lines connected to
these pins.