UC864-E Hardware User Guide
1vv0300766a Rev.1 - 31/01/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 15 of 51
To unconditionally restart UC864-E, the pad RESET# must be tied low for at least 200 milliseconds
and then released.
The maximum current that can be drained from the ON# pad is 0,15 mA.
A simple circuit to do it is:
NOTE: Do not use any pull up resistor on the RESET# line or any totem pole digital output. Using pull up resistor
may bring to latch up problems on the UC864-E power regulator and improper functioning of the module. The line
RESET# 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.
RESET#
Unconditional Restart
impulse
GND