LISA-U1 series - System Integration Manual
3G.G2-HW-10002-3
Preliminary
System description
Page 74 of 125
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 31: 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 32:
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 32: I
2
S interface pins
The I
2
S interface pins ESD sensitivity rating is 1 kV (Human Body Model according to JESD22-A114F).
Higher protection level could be required if the lines are externally accessible on the application board.
Higher protection level can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG
varistor array) on the lines connected to these pins.
