Specifications
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.1.1 Pad Assignment
- 2.1.2 Signal Properties
- 2.1.3 USB Interface
- 2.1.4 Serial Interface ASC0
- 2.1.5 Serial Interface ASC1
- 2.1.6 Inter-Integrated Circuit Interface
- 2.1.7 UICC/SIM/USIM Interface
- 2.1.8 Enhanced ESD Protection for SIM Interfaces
- 2.1.9 Digital Audio Interface
- 2.1.10 Analog-to-Digital Converter (ADC)
- 2.1.11 RTC Backup
- 2.1.12 GPIO Interface
- 2.1.13 Control Signals
- 2.1.14 JTAG Interface
- 2.1.15 eMMC Interface
- 2.2 GSM/UMTS/LTE Antenna Interface
- 2.3 GNSS Antenna Interface
- 2.4 Sample Application
- 2.1 Application Interface
- 3 GNSS Interface
- 4 Operating Characteristics
- 5 Mechanical Dimensions and Mounting
- 6 Regulatory and Type Approval Information
- 7 Document Information
- 8 Appendix
Cinterion
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ALAS5V Hardware Interface Description
4.2 Power Up/Power Down Scenarios
96
ALAS5V_HID_v00.030a 2019-03-20
Confidential / Preliminary
Page 73 of 124
4.2.3 Turn off or Restart ALAS5V
To switch off or restart the module the following procedures may be used:
• Software controlled shutdown procedure: Software controlledby sending an AT command
over the serial application interface. See Section 4.2.3.1.
• Software controlled restart procedure: Software controlled by sending an AT commandover
the serial application interface. See Section 4.2.3.2.
• Hardware controlled shutdown procedure: Hardware controlled shutdown by IGT line. See
Section 4.2.3.3.
• Hardware controlled shutdown or restart procedure: Hardware controlled shutdown or
restart by EMERG_OFF line. See Section 4.2.3.4.
• Automatic shutdown (software controlled): See Section 4.2.4
- Takes effect if ALAS5V board temperature exceeds a critical limit.
4.2.3.1 Switch off ALAS5V Using AT Shutdown Command
The best and safest approach to powering down ALAS5V is to issue the AT^SMSO command.
This procedure lets ALAS5V log off from the network and allows the software to enter into a
secure state and save data before disconnecting the power supply. The mode is referred to as
Power Down mode. After sending AT^SMSO do not enter any other AT commands. While pow-
ering down the module may still send some URCs. The AT command’s “OK” response indicates
that the data has been stored non-volatile and the module will turn down in a few seconds. The
complete power down procedure may take approx. 20s.To verify that the module definitely
turned off, it is possible to monitor the PWR_IND signal. A high state of the PWR_IND signal
line indicates that the module is being switched off as shown in Figure 29.
Be sure not to disconnect the supply voltage V
BATT+
before the module’s switch off procedure
has been completed. Otherwise you run the risk of losing data. Signal states during switch off
are shown in Figure 29.
While ALAS5V is in Power Down mode the application interface is switched off and must not
be fed from any other source. Therefore, your application must be designed to avoid any cur-
rent flow into any digital signal lines of the application interface. No special care is required for
the USB interface which is protected from reverse current.