Cinterion
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Java Terminals Hardware Interface Description
3.8 Power Supply
35
EHSxT_BGS5T_HID_v02 2014-05-23
Confidential / Preliminary
Page 30 of 70
3.8.1 Turn Java Terminals on
Java Terminals are turned on by plugging an appropriate power supply unit between PLUS and
GND of the 6-pole Western jack.
While the RST_IN pin (pin 3) is not active (voltage <2V) you can start the Java Terminals by
activating the RS-232 DTR line if in POWER DOWN mode.
The IGT_IN signal (pin 4) may be used to switch on Java Terminals if in POWER DOWN mode.
The watchdog can also be configured to turn the Java Terminals on if in POWER DOWN mode.
After startup of the Java Terminals the RS-232 lines are in an undefined state for approx.
900ms. This may cause undefined characters to be transmitted over the RS-232 lines during
this period.
3.8.2 Reset Java Terminals
An easy way to reset the Java Terminals is entering the command AT+CFUN=x,1. For details
on AT+CFUN please see [1].
The watchdog can also be configured to reset the Java Terminals if in POWER DOWN mode.
As an alternative, you can shut down the Java Terminals as described in Section 3.8.3 and then
restart it as described in Section 3.8.1.
3.8.3 Turn Java Terminals off
Normal shutdown:
• To turn off the Java Terminals use the AT^SMSO command, rather than disconnecting the
mains adapter.
This procedure lets the Java Terminals log off from the network and allows the software to
enter a secure state and save data before disconnecting the power supply. After AT^SMSO
has been entered the Java Terminals returns the following result codes:
^SMSO: MS OFF
OK
^SHUTDOWN
The "^SHUTDOWN" result code indicates that the Java Terminals turns off in less than
1 second. After the shutdown procedure is complete the Java Terminals enters the
POWER DOWN mode. The yellow LED stops flashing (see Section 3.13 for a detailed LED
description). The RTC is still fed from the voltage regulator in the power supply ASIC.
Please note that if there is an auto ignition connection between PLUS and IGT_IN the mod-
ule will restart automatically after a normal shutdown.
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