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 12 of 27
NOTE: don't use any pull up resistor on the RESET# line nor any totem pole digital output. Using pull up resistor
may bring to latch up problems on the GC864-C2 power regulator and improper functioning of the module. The
RESET# line must be connected only in open collector configuration.
TIP: The unconditional hardware Restart should be always implemented on the boards and software should use it
as an emergency exit procedure.
For example:
1- Let's assume you need to drive the
RESET#
line with a totem pole output of a +3/5 V
microcontroller (uP_OUT2):
Reset Signal Operating levels
:
Signal
Min
Max
RESET Input high
2.2V*
3.3V
RESET Input low
0V
0.2V
* this signal is internally pulled up so the pin can be left floating if not used.
