User's Manual

page 36/51
HiAll
NC
User Manual 2012/06/28
Figure 24: Power ON sequence
6.2.2 IO DC Presence before Power on
When VBAT is available but the module has not yet powered up, the following I/O's raise their output.
 POK_IN raise to 3V
 VBACKUP raise to 3V
 HSET_N raise to 1.4V
 HSET_P raise to 1.4V
6.2.3 MODULE RESET
To reset the module, a low level pulse must be sent on RESET pin during 10 ms. This action will immediately
restart the HiAll
NC
module. It is therefore useless to perform a new ignition sequence (POK_IN) after.

SAGEMCOM recommends using this feature in case of emergency, freeze of module or abnormal longer
time to respond to AT Commands, this signal is the only way to get the control back over the HiAll
NC
module.

RESET is a low level active signal internally pulled up to a dedicated power domain.
As RESET is internally pulled up, a simple open collector or open drain transistor can be used to control it.
Figure 23: Reset command of the HiAll
NC
by an external GPIO
HiAll
NC
Module
DCE
HOST
DTE
RESET
10ms
2.4V min
0.4V max
GPIO
2.8V
POK_IN
VGPIO
spike
Software Loading
Module is ready
to receive AT
commands
Module is
OFF
Module is
ON
2000ms
CTS
Typ 5 seconds
Max 7 seconds