GC864-QUAD-C2/PY-C2 Hardware User Guide
1vv0300744 Rev.1 - 24/10/06
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 23 of 27
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)
The
Input
pads can only be read and report the digital value (high or low) present on the pad at the
read time;
The
Output
pads can only be written or queried and set the value of the pad output; the alternate
function pad is internally controlled by the GC864-C2 firmware and acts depending on the function
implemented.
The
"alternate function"
are supported only by
GPIO5
(which can be configured to become a RF
Transmission monitor output reflecting the RF transmission activation) and
GPIO7
(which can be
configured to become a Buzzer output pin).
For more information about level specifications and GPIO setting, please refer
to 1vv0300694
GE864
Hardware User Guide and
1vv0300745
GC864-C2 Software User Guide.
