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
®
ALAS5V Hardware Interface Description
4.2 Power Up/Power Down Scenarios
96
ALAS5V_HID_v00.030a 2019-03-20
Confidential / Preliminary
Page 69 of 124
4.2 Power Up/Power Down Scenarios
In general, be sure not to turn on ALAS5V while it is beyond the safety limits of voltage and
temperature stated in Section 6.1. ALAS5V immediately switches off after having started and
detected these inappropriate conditions. In extreme cases this can cause permanent damage
to the module.
4.2.1 Turn on ALAS5V
When the ALAS5V module is in Power Down mode, it can be started to Normal mode by driving
the IGT (ignition) line to ground. It is required to use an open drain/collector driver to avoid cur-
rent flowing into this signal line. Pulling this signal low triggers a power-on sequence. To turn
on ALAS5V, it is strongly recommended to keep IGT active low at least 100 milliseconds, even
though under certain conditions a period of less than 100 milliseconds might be sufficient. After
turning on ALAS5V, IGT should be set inactive to prevent the module from turning on again
after a shut downby AT command or EMERG_OFF. For details on signal states during startup
see also Section 4.2.2.
Figure 28: Power-on with IGT
Note: After power up IGT should remain high. Also note that with a USB connection the USB
host may take some seconds to set up the virtual COM port connection.
After startup or mode change the following URCs are sent to every port able to receive AT com-
mands indicating the module’s ready state (this may take up to approx. 32s):
• "^SYSSTART" indicates that the module has entered Normal mode.
• "^SYSSTART AIRPLANE MODE" indicates that the module has entered Airplane mode.
These URCs notify the external application that the first ATcommand can be sent to the mod-
ule. If these URCs are not used to detect then the only way of checking the module’s ready
state can be checked by polling, e.g., send characters (e.g. "at")until the module is responding.
Please note that on USB ports these URCs are only sent if the USB interface is in state 'con-
figured', and with AT^SCFG= "MEopMode/ExpectDTR being enabled (see also Section 4.3)
the connected USB host has signaled being ready to receive data.
>100 ms
InitialState
Functionactive
IGT Systemstar tup,commandInterfaceinitializa tio n
BATT +
IGT
PW R_I ND
VEX T
EMERGOFF
USB