Specifications

Cinterion
®
EXS62-W/EXS82-W Hardware Interface Description
3.3 Power Saving
102
t EXS62-W_EXS82-W_HID_v01.200ee 2022-09-02
Public/ Released
Page 77 of 144
From SUSPEND mode the module can only be woken up by the ON or EMERG_RST signals,
or it may wake up and be reachable again after expiration of a negotiated 3GPP PSM periodic
TAU cycle (i.e., network timer)
that may include DRX as well as eDRX paging cycles for an inactivity
period
(see Section 3.3.3.3 for details).
The module wakes up with its signal states being the same as the first startup configuration
(see Section 3.2.3), and does not preserve the signal states it had in before entering SUSPEND
mode.
Figure 41 shows the handshake between external application, module and network for waking
up the module via ON/EMERG_RST signal.
Figure 41: Handshake for module wake up via ON signal
Figure 42 shows the handshake between external application, module and network for waking
up the module after expiry of the 3GPP PSM periodic TAU cycle (Tracking Area Update).
In this case the module automatically wakes up, and is reachable by the network to receive
data (e.g., an SMS). The module wakeup can be indicated to the external application by tog-
gling the RING0 line. See [1] for the AT^SGPICFG command to control the RING0 logic level.
The external application should now activate the appropriate communication interfaces to wake
up the module from SUSPEND mode, to receive the ^SYSRESUME URC, and to be able to
transfer data.
Figure 42: Handshake for module wake up after eDRX/PSM timer expiry
External
Application
Module Network
ON/EMERG_RST signal triggered
^SYSRESUME
RRC connection request
AT commands
(e.g., AT^SISO; AT^SISW
External
Application
Module Network
RING0 toggle
^SYSRESUME
Data/SMS
Other URCs, Data, SMS
Timer (TAU) expiry/update
Interfaces active