User's Manual

UE866 HARDWARE USER GUIDE 1vv0301157 Rev.7 • 2015-04-17 15 of 68
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WARNING:
Reserved pins must not be connected
If not used, almost all pins should be left disconnected. The only exceptions are the following pins:
PAD
Signal
Note
E2
VBATT
E1
VBATT_PA
D1, F1, G1, D2, F2, C3, E3,
F3, G3, F6, A8, G8, A11,
G11
GND
G2
Antenna
A4
C103/TXD
If not used should be connected to a Test Point
A5
C104/RXD
If not used should be connected to a Test Point
A1
C105/RTS
If not used should be connected to a Test Point
B1
C106/CTS
If not used should be connected to a Test Point
G6
VAUX / PWRMON
G4
RESET*
C1
TXD_AUX
If not used should be connected to a Test Point
C2
RXD_AUX
If not used should be connected to a Test Point
E5
USB D+
If not used should be connected to a Test Point or an
USB connector
E6
USB D-
If not used should be connected to a Test Point or an
USB connector
D4
USB_VBUS
If not used should be connected to a Test Point or an
USB connector
C7
SIMVCC
B7
SIMRST
A7
SIMCLK
A6
SIMIO
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.