User's Manual

LISA-U1/LISA-H1 series - System Integration Manual
3G.G2-HW-10002-2 Advance Information System description
Page 63 of 116
LISA-U1/LISA-H1
series
R1
INOUT
GND
GPS LDO
Regulator
SHDN
u-blox
3.0 V GPS receiver
R2
VMAIN3V0
U1
21
GPIO2
46
SDA
45
SCL
R4 R5
1V8
SDA1 SDA2
GND
U2
SCL1SCL2
VREF1VREF2
I2C-bus
Bidirectional
Voltage Translator
21
V_INT
C1
C2
C3
R3
23
GPIO3
24
GPIO4
1V8
A1 B1
GND
U3
A2B2
VCCAVCCB
Generic
Bidirectional
Voltage Translator
C4
C5
3V0
SDA2
SCL2
TxD1
EXTINT0
VCC
Figure 37: DDC Application circuit for u-blox 3.0 V GPS receiver
Reference
Description
Part Number - Manufacturer
R1, R2, R3, R4, R5
4.7 kΩ Resistor 0402 5% 0.1 W
RC0402JR-074K7L - Yageo Phycomp
C2, C3, C4, C5
100 nF Capacitor Ceramic X5R 0402 10% 10V
GRM155R71C104KA01 - Murata
U1
Voltage Regulator for GPS Receiver
See GPS Receiver Hardware Integration Manual
U2
I2C-bus Bidirectional Voltage Translator
PCA9306DCURG4 - Texas Instruments
U3
Generic Bidirectional Voltage Translator
TXB0104PWR - Texas Instruments
Table 25: Components for DDC application circuit for u-blox 3.0 V GPS receiver
1.11 Audio Interface (LISA-U120 and LISA-U130 only)
LISA-U120 and LISA-U130 modules provide analog and digital audio interfaces:
 One differential analog audio input (microphone input)
 One differential analog audio output (speaker output)
 One 4-wire I
2
S digital audio interface: input and output
Audio signal routing can be controlled by the dedicated AT command +USPM (refer to u-blox AT Commands
Manual [2]). This command allows setting the audio path mode, composed by the uplink audio path and the
downlink audio path.