Data Sheet
Table Of Contents
- Document Information
- Contents
- 1 Functional description
- 2 Interfaces
- 3 Pin definition
- 4 Electrical specifications
- 4.1 Absolute maximum rating
- 4.2 Operating conditions
- 4.2.1 Operating temperature range
- 4.2.2 Thermal parameters
- 4.2.3 Supply/power pins
- 4.2.4 Current consumption
- 4.2.5 LTE RF characteristics
- 4.2.6 2G RF characteristics
- 4.2.7 ANT_DET pin characteristics
- 4.2.8 PWR_ON pin
- 4.2.9 RESET_N pin
- 4.2.10 SIM pins
- 4.2.11 USB pins
- 4.2.12 Generic Digital Interfaces pins
- 4.2.13 DDC (I2C) pins
- 4.3 Parameters for ATEX applications
- 5 Mechanical specifications
- 6 Qualification and approvals
- 7 Product handling & soldering
- 8 Labeling and ordering information
- Appendix
- A Glossary
- Related documents
- Revision history
- Contact
SARA-R4/N4 series - Data Sheet
UBX-16024152 - R16 Interfaces Page 13 of 39
The USB_D+ / USB_D- lines carry the USB data and signaling, while the VUSB_DET pin represents the
input to enable the USB interface by applying an external valid USB VBUS voltage (5.0 V typical).
☞ The USB interface is available as an AT command / data communication interface 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.
☞ If the USB interface is enabled, the module does not enter the low power deep sleep mode: the
external USB VBUS voltage needs to be removed from the VUSB_DET input of the module to let it
enter the Power Saving Mode defined in 3GPP Rel.13.
SARA-R4/N4 series modules provide by default a set of two USB functions:
AT commands and data communication
Diagnostic log
For more details regarding USB configurations / capabilities, see the SARA-R4/N4 series System
Integration Manual [2].
2.5.3 SPI interface
☞ The SPI interface is not supported by the “00”, “01”, “02” and “52” product versions.
SARA-R4/N4 series modules include a Serial Peripheral Interface for communications with compatible
external device.
The SPI interface can be made available as an alternative function, in a mutually exclusive way, over
the digital audio interface pins (I2S_WA / SPI_MOSI, I2S_RXD / SPI_MISO, I2S_CLK / SPI_CLK,
I2S_TXD / SPI_CS).
2.5.4 SDIO interface
☞ The SDIO interface is not supported by the “00”, “01”, “02” and “52” product versions.
SARA-R4/N4 series modules include a 4-bit Secure Digital Input Output interface (SDIO_D0, SDIO_D1,
SDIO_D2, SDIO_D3, SDIO_CLK, and SDIO_CMD) designed to communicate with external compatible
SDIO devices.
2.5.5 DDC (I
2
C) interface
☞ The DDC (I
2
C) interface is not supported by the “00” and “01” product versions.
SARA-R4/N4 series modules include an I
2
C-bus compatible DDC interface (SDA, SCL) available to
communicate with a u-blox GNSS receiver and with external I
2
C devices as for example an audio codec:
the SARA-R4/N4 series module acts as an I
2
C master that can communicate with I
2
C slaves in
accordance with the I
2
C bus specifications [11].
The SDA and SCL pins have internal pull-up to V_INT, so there is no need of additional pull-up resistors
on the external application board.