Ublox LISA-U2 Series, System Integration Manual

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LISA-U2 series - System integration manual
UBX-13001118 - R27 System description Page 11 of 183
C1-Public
1.3 Pin-out
Table 3 details the pin-out of the LISA-U2 modules, with pins grouped by function.
Function Pin Module No I/O Description Remarks
Power VCC All 61, 62, 63 I Module supply
input Clean and stable supply is required: low ripple
and low voltage drop must be guaranteed.
Voltage provided must be always above the
minimum limit of the operating range.
Consider that there are large current spikes in
connected mode, when a GSM call is enabled.
VCC pins are internally connected, but all the
available pads must be connected to the
external supply in order to minimize power
loss due to series resistance.
See section
1.5.2
GND All 1, 3, 6, 7,
8, 17, 25,
28, 29, 30,
31, 32, 33,
34, 35, 36,
37, 38, 60,
64, 65, 66,
67, 69, 70,
71, 72, 73,
75, 76 N/A Ground GND pins are internally connected but a good
(low impedance) external ground connection
can improve RF performance: all
GND pins
must be externally connected to ground.
V_BCKP All 2 I/O Real Time Clock
supply
input/output
V_BCKP = 1.8 V (typical) generated by the
module when VCC supply voltage is within
valid operating range.
See section
1.5.4
V_INT All 4 O
Digital Interfaces
supply output V_INT = 1.8V (typical) generated by the
module when it is switched-on and the
RESET_N (external reset input pin) is not
forced to the low level.
See section
1.5.5
VSIM All 50 O SIM supply output VSIM = 1.80 V typical or 2.90 V typical
generated by the module according to the SIM
card type.
See section
1.8
RF ANT All 68 I/O RF input/output
for main Tx/Rx
antenna
50

nominal impedance.
See section 1.7 , section 2.4 and section
2.2.1.1
ANT_DIV LISA-U230 74 I RF input for Rx
diversity antenna 50
Ω
nominal impedance
See section 1.7 , section 2.4 and section
2.2.1.1
SIM SIM_IO All 48 I/O SIM data Internal 4.7 k  pull-up to VSIM .
Must meet SIM specifications.
See section
1.8
SIM_CLK All 47 O SIM clock Must meet SIM specifications.
See section
1.8
SIM_RST All 49 O SIM reset Must meet SIM specifications.
See section
1.8