
xE922-3GR Hardware User Guide
1VV0301272
Rev.0.8 2017-01-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved.
Page 66 of 112
10.5.
Touch panel
PAD
Signal
I/O
descriptions
Type
Touch Screen interface
AD17
TP_SDA
I/O
Touch panel I2C Data
CMOS 1.8V
AB17
TP_SCL
I/O
Touch panel I2C Clock
CMOS 1.8V
F7
TP_RESET
I/O
Touch panel Reset
CMOS 1.8V
F11
TP_IRQ
I/O
Touch panel Interrupt
CMOS 1.8V
A dedicated I2C bus and control lines are foreseen to interface with an external touch panel control IC.
Besides touch panel interface, this I2C bus can also be applied for display EDID retrieval at boot time.
In case touch panel is not used, the above signals can be used as GPIO’s, interrupts or
general purpose I2C.