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Cinterion
®
TX62-W(-B/-C)/TX82-W Hardware Interface Description
3.3 Power Saving
110
t TX62-W_TX62-W-x_TX82-W_HID_v01.000 2021-10-05
Confidential / Preliminary
Page 82 of 154
3.3.1.2 SUSPEND Mode
In contrast to SLEEP mode, SUSPEND mode is a module’s low power mode with almost all
components switched off - except for the internal RTC and interrupt triggered wake up mech-
anisms. The module stays registered to the network, and the RRC connection is released. The
module is in its lowest power consumption state.
Once the SUSPEND mode is enabled via AT command (see MEopMode/PowerMgmt/Sus-
pend”), and the appropriate SUSPEND mode indicators are enabled (see PSM and possible
eDRX settings need to be negotiated with the network. eDRX and PSM network settings are
described in more detail in Section 3.3.3.2 and Section 3.3.3.3.
If the PSM settings are agreed upon with the network, TX62/TX82 is able to enter SUSPEND
mode, and the following AT^SIND URC is generated:
+CIEV: “suspendAvailable”,1
In addition, if there is no further communication with the network, and the module is ready to
enter SUSPEND mode, the following AT^SIND URC is generated:
+CIEV: "suspendReady",1
Also, the SUSPEND_MON signal will turn low as soon as the module enters SUSPEND mode
(see Section 2.1.11.5).
Figure 41 shows the handshake between external application, module and the network for en-
tering SUSPEND mode or possibly SLEEP mode depending on configuration and network re-
sponse.
Figure 41: Handshake for entering the module’s SUSPEND mode
External
Application
Module Network
EnableSUSPENDmode
(AT^SCFG“MEopMode /
PowerMgmt/Suspend”)
ReadyforSUSPENDmode
(+CIEV:“suspendReady“,1)
Interfacesinactive
SUSP ENDoroptionallySLEEP
modereac h ed
RequestPSMtim ers
(AT+C PSMS)
RequestPSMandoptionaleDRX
withdesiredtimers
NetworkconfirmsPSMand/or
optionaleDRX andassignstimers
SUSPENDmo depo ssib le
(+CIEV:“suspendAvailable“ ,1)
Optional:RequesteDRXtimers
(AT+CEDRXS/AT+S EDRXS)