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 38 of 129
C1-Public
1.9.1.3 UART multiplexer protocol
SARA-R4 series modules include multiplexer functionality as per 3GPP TS 27.010 [9], on the primary
main UART physical link. This is a data link protocol which uses HDLC-like framing and operates
between the module (DCE) and the application processor (DTE) and allows a number of simultaneous
sessions over the primary main UART physical link. The following virtual channels are defined:
• Channel 0:
for Multiplexer control
• Channel 1:
for all AT commands, and non-Dial Up Network (non-DUN) data connections. UDP,
TCP data socket / data call connections via relevant AT commands.
• Channel 2:
for Dial Up Network (DUN) data connection. It requires the host to have and use its
own TCP/IP stack. The DUN can be initiated on modem side or terminal/host side.
• Channel 3:
for u-blox GNSS data tunneling (not supported by SARA-R410M-01B product version
and SARA-R422 product versions).
1.9.2 USB interface
1.9.2.1 USB features
SARA-R4 series modules include a high-speed USB 2.0 compliant interface with a maximum 480 Mb/s
data rate according to the USB 2.0 specification [5]. The module itself acts as a USB device and can
be connected to any USB host equipped with compatible drivers.
The USB is the most suitable interface for transferring high speed data between the SARA-R410M
and SARA-R412M modules and an external host processor, available for AT / data communication,
FW upgrade by means of the FOAT feature.
The USB is the interface of SARA-R4 series modules available for FW upgrade by means of the u-blox
dedicated tool and for diagnostic purposes.
SARA-R410M and SARA-R412M modules provide the following USB lines:
• the USB_D+ / USB_D- lines, carrying the USB data and signaling
• the VUSB_DET input pin to enable the USB interface by applying an external voltage (5.0 V typical)
SARA-R422, SARA-R422S and SARA-R422M8S modules provide the following USB lines:
• the USB_D+ / USB_D- lines, carrying the USB data and signaling
• the USB_5V0 input pin to enable the USB interface by applying an external 5.0 V typical voltage
• the USB_3V3 input pin to supply the USB interface by applying an external 3.3 V typical voltage
• the RSVD #33 pin to be externally accessible to enable FW upgrade over the USB interface
☞ The USB interface is available as an AT / data communication interface on the SARA-R410M and
SARA-R412M modules only if an external valid USB VBUS voltage (5.0 V typical) is applied at the
VUSB_DET input of the module since the switch-on of the module, and then held during normal
operations. In this case, the UART will not be available.
☞ AT command / data communication are not supported over USB on SARA-R422, SARA-R422S and
SARA-R422M8S modules: the USB interface is available on these modules product versions for
FW upgrade by means of the u-blox dedicated tool and for diagnostic purposes only.
☞ If the USB interface is enabled, the module does not enter the low power deep sleep mode: the
external voltage needs to be removed from the VUSB_DET / USB_5V0 and USB_3V3 input pins of
the module to let it enter the Power Saving Mode defined in 3GPP Rel.13.
☞ It is highly recommended to provide accessible test points directly connected to the V_INT,
PWR_ON / PWR_CTRL, VUSB_DET / USB_5V0, USB_3V3, USB_D+, USB_D-, RSVD #33 pins for
FW upgrade and/or for diagnostic purpose.