User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved. Page 63 of 88
12. General Purpose I/O
The general-purpose I/O pads can be configured to act in three different ways:
 input
 output
 alternate function (internally controlled)
Input pads can only be read and report the digital value (high or low) present on the pad at the
read time; output pads can only be written or queried and set the value of the pad output; an
alternate function pad is internally controlled by the LE920 firmware and acts depending on
the function implemented.
The following GPIOs are available on the LE920.
PAD
Signal
I/O
Function
Type
Drive Strength
F9
GPIO_01
I/O
Configurable GPIO
CMOS 1.8V
2mA
E10
GPIO_02
I/O
Configurable GPIO
CMOS 1.8V
2mA
F11
GPIO_03
I/O
Configurable GPIO
CMOS 1.8V
2mA
E12
GPIO_04
I/O
Configurable GPIO
CMOS 1.8V
2mA
F13
GPIO_05
I/O
Configurable GPIO
CMOS 1.8V
2mA
E14
GPIO_06
I/O
Configurable GPIO
CMOS 1.8V
2mA
R18
GPIO_07
I/O
Configurable GPIO
CMOS 1.8V
2mA
S19
GPIO_08
I/O
Configurable GPIO
CMOS 1.8V
2mA
U19
GPIO_09
I/O
Configurable GPIO
CMOS 1.8V
2mA
W19
GPIO_10
I/O
Configurable GPIO
CMOS 1.8V
2mA
NOTE:
In order to avoid a back-powering effect it is recommended to avoid having any HIGH logic
level signal applied to the digital pins of the module when it is powered OFF or during an
ON/OFF transition.
NOTE:
LE920 GPIO can also be used as alternate I2C function.
Refer to I2C section