Integration Manual
Table Of Contents
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Supply interfaces
- 1.5.1 Module supply input (VCC)
- 1.5.1.1 VCC supply requirements
- 1.5.1.2 VCC current consumption in 2G connected mode
- 1.5.1.3 VCC current consumption in 3G connected mode
- 1.5.1.4 VCC current consumption in LTE connected mode
- 1.5.1.5 VCC current consumption in cyclic low power idle mode / active mode
- 1.5.1.6 VCC current consumption in fixed active mode
- 1.5.2 Generic digital interfaces supply output (V_INT)
- 1.5.1 Module supply input (VCC)
- 1.6 System function interfaces
- 1.7 Antenna interfaces
- 1.8 SIM interfaces
- 1.9 Data communication interfaces
- 1.10 eMMC interface
- 1.11 Digital Audio interfaces
- 1.12 ADC interfaces
- 1.13 General Purpose Input/Output
- 1.14 Reserved pins (RSVD)
- 1.15 System features
- 1.15.1 Network indication
- 1.15.2 Jamming detection
- 1.15.3 IP modes of operation
- 1.15.4 Dual stack IPv4 and IPv6
- 1.15.5 Embedded TCP/IP and UDP/IP
- 1.15.6 Embedded FTP and FTPS
- 1.15.7 Embedded HTTP and HTTPS
- 1.15.8 SSL and TLS
- 1.15.9 Firmware update Over AT (FOAT)
- 1.15.10 Firmware update Over The Air (FOTA)
- 1.15.11 Power Saving
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC)
- 2.2.1.1 General guidelines for VCC supply circuit selection and design
- 2.2.1.2 Guidelines for VCC supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC supply circuit design using a LDO linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary battery
- 2.2.1.6 Additional guidelines for VCC supply circuit design
- 2.2.1.7 Guidelines for the external battery charging circuit
- 2.2.1.8 Guidelines for external charging and power path management circuit
- 2.2.1.9 Guidelines for removing VCC supply
- 2.2.1.10 Guidelines for VCC supply layout design
- 2.2.1.11 Guidelines for grounding layout design
- 2.2.2 Generic digital interfaces supply output (V_INT)
- 2.2.1 Module supply (VCC)
- 2.3 System functions interfaces
- 2.4 Antenna interface
- 2.5 SIM interfaces
- 2.6 Data communication interfaces
- 2.7 eMMC interface
- 2.8 Digital Audio interface
- 2.9 ADC interfaces
- 2.10 General Purpose Input/Output
- 2.11 Reserved pins (RSVD)
- 2.12 Module placement
- 2.13 Module footprint and paste mask
- 2.14 Thermal guidelines
- 2.15 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- 6 FCC Notes
- Appendix
- Glossary
- Related documents
- Revision history
- Contact
TOBY-L3 series - System Integration Manual
TSD-19090601 - R13 System Integration Manual Page 35 of 143
☞ The duration of the TOBY-L3 series modules’ switch-on routine can largely vary depending on the
application / network settings and any concurrent module activities.
⚠ It is highly recommended to avoid an abrupt removal of the VCC supply and/or performing an abrupt
emergency shutdown procedure during TOBY-L3 series modules’ switch-on routine.
1.6.2 Module power-off
TOBY-L3 series can be properly switched off by:
+CPWROFF AT command (see the TOBY-L3 series AT Commands Manual [2])
Power off command on the Linux shell
3
Low pulse on the PWR_ON pin, which is normally set high by an internal pull-up, for a valid time period
(see the TOBY-L3 series Data Sheet [1], module normal graceful switch-off: the internal switch-off
sequence of the module starts when the external application releases the PWR_ON line from the low
logic level, after that it has been set low for an appropriate time period.
The methods listed above represent the appropriate normal switch-off events, triggering an appropriate
normal switch-off procedure of the module: the current parameter settings are saved in the module’s non-
volatile memory and a clean network detach is performed.
An abrupt under-voltage shutdown occurs on TOBY-L3 series modules when the VCC module supply is
removed. If this occurs, it is not possible to perform the storing of the current parameter settings in the
module’s non-volatile memory or to perform a clean network detach.
☞ It is highly recommended to avoid an abrupt removal of the VCC supply during TOBY-L3 series modules
normal operations: the switch-off routine must be started by an appropriate switch-off event (see above),
and then a suitable VCC supply must be held at least until the end of the modules’ internal switch-off
sequence, which occurs when the generic digital interfaces supply output (V_INT) is switched off by the
module.
☞ If the module does not provide a reply to a specific AT command after a time period longer than the
one defined in the TOBY-L3 series AT Commands Manual [2], than the reset procedure by toggling the
RESET_N line (see section 1.6.3) is preferred.
An over-temperature shutdown occurs on TOBY-L3 series modules when the temperature measured within
the cellular module reaches a critical range.
3
Not supported by "0x" product feature versions