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XT65 Schematic ( PDF Datasheet ) - Siemens

Teilenummer XT65
Beschreibung Release Notes
Hersteller Siemens
Logo Siemens Logo 




Gesamt 8 Seiten
XT65 Datasheet, Funktion
s
www.DataSheet4U.com
XT65/XT75
Siemens Cellular Engine
Version: 01.001
DocID:
XT65_XT75_rn_v01.001






XT65 Datasheet, Funktion
XT65/XT75 Release Notes
Confidential / Released
s
3 Known Issues
AT command / feature Brief description
GPIO performance
www.DataSheet4U.com
The maximum number of pulses that can be measured at all
GPIO input pins depends on the total performance of the Java
application. The theoretical limit is up to 20 pulses per second at
all GPIO input pins in total, but not more than 10 pulses per
second for one GPIO input. This performance can be achieved
by a Java application which uses a separate ATCommand Class
instance for GPIO handling. Other activities running in parallel will
decrease the limit. Keep in mind that this also implies unsolicited
network initiated activities, such as a location update.
Also, take into account that state transitions can be properly
detected only if the signal remains stable for 8 TDMA frames
(= 36.93 ms) in Normal mode, or accordingly, 0.9 s to 2.7 s in
SLEEP mode. For further detail please refer to the specification
of the AT^SCPOL command provided in [1].
If the limit is exceeded the ATCommandListener Class calls the
Callback method ATEvent() with a NULL string, and the
System.out will print a string which reads
"com.siemens.icm.io.ATCommandFailedException: Error getting
URC HW, URC has been lost, too many URCs waiting". For
further detail please refer to [17].
To avoid too many state transitions on the ATCommandListener
instance we recommend that you configure several GPIOs as
one single port and enable polling on that port only.
OTAP over CS bearer
during running CS call
(voice or data)
In some networking infrastructures there may be an interference
between OTAP started on a circuit-switched bearer (CS) and an
existing CS call. As a result, an OTAP failure may occur.
If such a scenario is likely to happen in your application
environment we recommend that a delay of around 15s be set
between hanging up the CS call and starting OTAP over CSD.
This means that you cannot use the standard SM trigger for
OTAP because there are no 15s time when shutting down the
running Java application. Instead, trigger OTAP from your
application (e.g. receive trigger SM from application, hang up CS
call, wait 15s, start OTAP by AT command).
In emergency cases (when your Java application is
malfunctioning) you can still use the SM trigger for OTAP but you
probably need to try several times to make sure that there is no
CS call at the time OTAP starts over CSD.
XT65_XT75_rn_v01.001
Page 6 of 8
2007-01-18

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