Integration Manual
Table Of Contents
- Preface
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Power management
- 1.6 System functions
- 1.7 RF connection
- 1.8 (U)SIM interface
- 1.9 Serial communication
- 1.10 DDC (I2C) interface
- 1.11 Audio Interface
- 1.12 General Purpose Input/Output (GPIO)
- 1.13 Reserved pins (RSVD)
- 1.14 Schematic for LISA-U series module integration
- 1.15 Approvals
- 2 Design-In
- 2.1 Design-in checklist
- 2.2 Design Guidelines for Layout
- 2.2.1 Layout guidelines per pin function
- 2.2.2 Footprint and paste mask
- 2.2.3 Placement
- 2.3 Thermal aspects
- 2.4 Antenna guidelines
- 2.5 ESD precautions
- 3 Features description
- 4 Handling and soldering
- 5 Product Testing
- Appendix
- A Migration to LISA-U2 series wireless modules
- B Glossary
- Related documents
- Revision history
- Contact
LISA-U series - System Integration Manual
3G.G2-HW-10002-A3 Preliminary System description
Page 95 of 160
Use transistors with at least an integrated resistor in the base pin or otherwise put a 10 kΩ resistor on
the board in series to the GPIO.
If the GPIO pins are not used, they can be left unconnected on the application board.
Any external signal connected to GPIOs must be tri-stated when the module is in power-down mode,
when the external reset is forced low and during the module power-on sequence (at least for 3 s after
the start-up event), to avoid latch-up of circuits and allow a proper boot of the module. If the external
signals connected to the module cannot be tri-stated, insert a multi channel digital switch (e.g. Texas
Instruments SN74CB3Q16244, TS5A3159, or TS5A63157) between the two-circuit connections and set
to high impedance during module power down mode, when external reset is forced low and during
power-on sequence.
SIM card holder
SW1
SW2
4
V_INT
51
GPIO5
R3
R2
OUTIN
GND
LDO Regulator
SHDN
3V8 1V8
GPIO3
GPIO4
TxD1
EXTINT0
23
24
R1
VCC
GPIO2 21
LISA-U series
u-blox
1.8 V GPS receiver
U1
J1
C1
R4
R6
3V8
Network Indicator
R5
GPS Supply Enable
GPS Data Ready
GPS RTC Sharing
SIM Detection
20
GPIO1
DL1
T1
D1
Functions not supported by LISA-Uxxx-00 versions
Function not supported by LISA-U200-00 version
Figure 49: GPIO application circuit
Reference
Description
Part Number - Manufacturer
R1
47 kΩ Resistor 0402 5% 0.1 W
Various manufacturers
U1
Voltage Regulator for GPS Receiver
See GPS Module Hardware Integration Manual
R2
1 kΩ Resistor 0402 5% 0.1 W
Various manufacturers
R3
470 kΩ Resistor 0402 5% 0.1 W
Various manufacturers
D1
ESD Transient Voltage Suppressor
USB0002RP or USB0002DP - AVX
J1
SIM Card Holder
CCM03-3013LFT R102 - C&K Components (or equivalent)
R4
10 kΩ Resistor 0402 5% 0.1 W
Various manufacturers
R5
47 kΩ Resistor 0402 5% 0.1 W
Various manufacturers
R6
820 Ω Resistor 0402 5% 0.1 W
Various manufacturers
DL1
LED Red SMT 0603
LTST-C190KRKT - Lite-on Technology Corporation
T1
NPN BJT Transistor
BC847 - Infineon
Table 42: Components for GPIO application circuit