Gemalto M2M GmbH XT55 사용자 설명서
XT55/56 Hardware Interface Description
Confidential / Preliminary
Confidential / Preliminary
s
XT55/56_hd_v02.96
Page 66 of 125
18.08.2005
3.12 Control
Signals
3.12.1 Inputs
Table 17: Input control signals of the GSM part of the XT55/56 module
Signal
Pin
Pin status
Function
Remarks
Falling edge
Power up XT55/56
Ignition
GSM_IGT
Left open or HiZ No operation
Active low
≥ 100ms (Open
drain/collector driver to GND
required in cellular device
application).
required in cellular device
application).
Note: If a charger and a
battery is connected to the
customer application the
GSM_IGT signal must be 1s
minimum.
battery is connected to the
customer application the
GSM_IGT signal must be 1s
minimum.
Low
Power down
XT55/56
XT55/56
Emergency
shutdown
shutdown
GSM_EMERG-
OFF
OFF
Left open or HiZ No operation
Active low
≥ 3.2s (Open
drain/collector driver
required in cellular device
application). At the
GSM_EMERGOFF signal
the watchdog signal of the
GSM engine can be traced
(see description in Table
27).
required in cellular device
application). At the
GSM_EMERGOFF signal
the watchdog signal of the
GSM engine can be traced
(see description in Table
27).
(HiZ = high impedance)