Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 GNSS Interface
- 2.4 Sample Application
- 3 Operating Characteristics
- 3.1 Operating Modes
- 3.2 Power Up/Power Down Scenarios
- 3.3 Power Saving
- 3.4 Power Supply
- 3.5 Operating Temperatures
- 3.6 Electrostatic Discharge
- 3.7 Blocking against RF on Interface Lines
- 3.8 Reliability Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
®
EXS62-W/EXS82-W Hardware Interface Description
3.2 Power Up/Power Down Scenarios
102
t EXS62-W_EXS82-W_HID_v01.200ee 2022-09-02
Public/ Released
Page 69 of 144
3.2.4 Turn off EXSx2-W
To switch the module off the following procedures may be used:
• Software controlled shutdown procedure: Software controlled by sending an AT command
over the serial application interface. See Section 3.2.4.1.
• Hardware controlled shutdown procedure: Hardware controlled by setting the FST_SHDN
line to low. See Section 2.1.11.3.
• Automatic shutdown (software controlled): See Section 3.2.5
- Takes effect if EXSx2-W board temperature exceeds a critical limit, or if
- Undervoltage or overvoltage is detected.
With any shutdown scenario it is recommended to monitor the V180 line. If V180 is low, it is
safe to cut the module power supply. Cutting the power supply too early, i.e., if V180 is not low,
might harm the module.
3.2.4.1 Switch off EXSx2-W Using AT Command
The best and safest approach to powering down the module is to issue the AT^SMSO com-
mand. This procedure lets the module log off from the network and allows the software to enter
into a secure state and to save data before disconnecting the power supply. Any AT commands
after AT^SMSO are ignored, and the shutdown procedure continues undisturbed. The shut-
down procedure is an active process (depending on environmental conditions such as network
states) until the module switches off - for signal behavior and timings see Figure 37 and Table
15. It cannot be specified how long the shutdown procedure may take at the worst.
Figure 37: Switch off behavior
T0 T1 T2T3
BATT+
BB
V180
VCORE
TXD0
RXD0
AT^SMSO
Shutdown URC
T4
Timing between T0 and T1 may take up to 1 min or even
more dep ending on the n etwork
High
High
High
High
High
Low
Low
Low
Low
For timing values see Table 15.