User's Manual

UE910 3G HARDWARE USER GUIDE 1vv0301171 Rev.3 • 2015-04-17 18 of 78
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If not used, almost all pins should be left disconnected. The only exceptions are the following pins:
PAD
Signal
Note
M1,M2,N1,N2,P1,P2
VBATT & VBATT_PA
E1, G1, H1, J1, L1, A2, E2, F2, G2, H2
J2,K2,L2,R2,M3,N3,P3,R3,D4,M4,
N4,P4,R4,N5,P5,R5,N6,P6,R6,P8,
R8,P9,P10,R10,M12,B13,P13,E14
GND
R12
ON/OFF*
R13
HW_SHUTDOWN*
B15
USB_D+
If not used should be connected to a
Test Point or an USB connector
C15
USB_D-
If not used should be connected to a
Test Point or an USB connector
A13
VUSB
If not used should be connected to a
Test Point or an USB connector
N15
C103/TXD
If not used should be connected to a
Test Point
M15
C104/RXD
If not used should be connected to a
Test Point
L14
C105/RTS
If the flow control is not used it should
be connected to GND
P15
C106/CTS
If not used should be connected to a
Test Point
D15
TXD_AUX
If not used should be connected to a
Test Point
E15
RXD_AUX
If not used should be connected to a
Test Point
K1
MAIN ANTENNA
A6
SIMCLK
A7
SIMRST
A5
SIMIO
A4
SIMIN
RTS pin should be connected to the GND (on the module side) if flow control is not used.
The above pins are also necessary to debug the application when the module is assembled on it so
we recommend connecting them also to dedicated test point.