Integration Manual
Table Of Contents
- Document information
- 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 LTE connected mode
- 1.5.1.3 VCC current consumption in 2G connected mode
- 1.5.1.4 VCC current consumption in ultra low power deep sleep mode
- 1.5.1.5 VCC current consumption in low power idle mode
- 1.5.1.6 VCC current consumption in active mode (PSM / low power disabled)
- 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 interface
- 1.9 Data communication interfaces
- 1.10 Audio
- 1.11 General Purpose Input/Output
- 1.12 GNSS peripheral input output
- 1.13 Reserved pins (RSVD)
- 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 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 Guidelines for external battery charging circuit
- 2.2.1.7 Guidelines for external charging and power path management circuit
- 2.2.1.8 Guidelines for particular VCC supply circuit design for SARA-R4x2
- 2.2.1.9 Guidelines for removing VCC supply
- 2.2.1.10 Additional guidelines for VCC supply circuit design
- 2.2.1.11 Guidelines for VCC supply layout design
- 2.2.1.12 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 interfaces
- 2.5 SIM interface
- 2.6 Data communication interfaces
- 2.7 Audio
- 2.8 General Purpose Input/Output
- 2.9 GNSS peripheral input output
- 2.10 Reserved pins (RSVD)
- 2.11 Module placement
- 2.12 Module footprint and paste mask
- 2.13 Thermal guidelines
- 2.14 Schematic for SARA-R4 series module integration
- 2.15 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 4.1 Product certification approval overview
- 4.2 US Federal Communications Commission notice
- 4.3 Innovation, Science, Economic Development Canada notice
- 4.4 European Conformance CE mark
- 4.5 National Communication Commission Taiwan
- 4.6 ANATEL Brazil
- 4.7 Australian Conformance
- 4.8 GITEKI Japan
- 4.9 KC South Korea
- 5 Product testing
- Appendix
- A Migration between SARA modules
- B Glossary
- Related documentation
- Revision history
- Contact
SARA-R4 series - System integration manual
UBX-16029218 - R20 System description Page 30 of 129
C1-Public
1.6.2 Module power-off
SARA-R4 series modules can be gracefully switched off by:
• AT+CPWROFF command (see SARA-R4 series AT commands manual [2]).
• Low pulse on the PWR_ON / PWR_CTRL pin for a valid time period (for detailed characteristics see
the SARA-R4 series data sheet [1]).
These events listed above trigger the storage of the current parameter settings in the non-volatile
memory of the module, and a clean network detach procedure.
An emergency faster and safe power-off procedure of SARA-R422, SARA-R422S, SARA-R422M8S
modules, without proper network detach, can be triggered by:
• AT+CFUN=10 command (see SARA-R4 series AT commands manual [2])
• Toggling the GPIO input pin configured with the fast and safe power-off function (see section 1.11)
☞ The graceful switched off procedure triggered by the +CPWROFF AT command or by proper low
pulse at the PWR_ON / PWR_CTRL input pin must be preferred rather than the faster and safe
power-off procedure triggered by the AT+CFUN=10 command or by toggling the configured GPIO
pin, as the faster and safe power-off procedure is intended to be used in case of emergency only.
An abrupt under-voltage shutdown occurs on SARA-R4 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 the clean network detach.
☞ It is highly recommended to avoid an abrupt removal of the VCC supply during SARA-R4 series
modules normal operations.
⚠ An abrupt removal of the VCC supply during SARA-R4 series modules normal operations may lead
to an unrecoverable faulty state!
An abrupt hardware shutdown occurs on SARA-R410M and SARA-R412M modules when a low level
is applied on RESET_N pin. In this case, the current parameter settings are not saved in the module’s
non-volatile memory and a clean network detach is not performed.
☞ It is highly recommended to avoid an abrupt hardware shutdown of the module by forcing a low
level on the RESET_N input pin during module normal operation: the RESET_N line should be set
low only if reset or shutdown via AT commands fails or if the module does not reply to a specific
AT command after a time period longer than the one defined in SARA-R4 series AT commands
manual [2].
⚠ Forcing a low level on the RESET_N input during SARA-R4 series modules normal operations may
lead to an unrecoverable faulty state!