CC864-DUAL Hardware User Guide
1vv0300791 Rev 4.4 – 2011-01-26
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved.
Page 18 of 63
NOTE:
To check if the CC864-DUAL has powered on, the hardware line PWRMON must be
monitored. When PWRMON goes high, the module has powered on.
NOTE:
Do not use any pull up resistor on the ON# line, it is internally pulled up. Using pull up
resistor may bring to latch up problems on the CC864-DUAL power regulator and
improper power on/off of the module. The line ON# must be connected only in open
collector configuration.
NOTE:
In this document all the lines are inverted. Active low signals are labeled with a name
that ends with a "#" or with a bar over the name.
NOTE:
CC864-DUAL turns fully on also by supplying power to the Charge pad (provided
there is a battery on the VBATT pads).
For example:
1- Let us assume you need to drive the ON# pad with a totem pole output of a
+1.8/5 V microcontroller (uP_OUT1):
3.2.3.
Turning Off the CC864-DUAL
The module may be turned off with either a software command or a hardware
shutdown circuit.
When the device is shut down, it notifies the network that it is powering down and is
therefore no longer reachable.
Warning
: Never disconnect power before the power off procedure is completed. This
may cause severe damage and render the module inoperable.
