TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 39 of 164
1.9
Data communication interfaces
TOBY-L2 and MPCI-L2 series modules provide the following serial communication interface:
USB interface: High-Speed USB 2.0 compliant interface available for the communication with an
external host application processor, for AT commands, data communication, FW upgrade by
means of the FOAT feature, FW upgrade by means of the u-blox EasyFlash tool and for diagnostic
purpose (see section
for functional description)
TOBY-L2 series modules additionally provide the following serial communication interfaces:
UART interface: asynchronous serial interface available for the communication with an external
host application processor, for AT commands, data communication, FW upgrade by means of the
FOAT feature (see section
for functional description)
DDC interface: I
2
C bus compatible interface available for the communication with external I
2
C
devices as an audio codec (see section
SDIO interface: Secure Digital Input Output interface available for the communication with an
external u-blox Wi-Fi module (see section
for functional description)
1.9.1
Universal Serial Bus (USB)
1.9.1.1
USB features
TOBY-L2 and MPCI-L2 series modules include a High-Speed USB 2.0 compliant interface with
maximum data rate of 480 Mb/s, representing the main interface for transferring high speed data
with a host application processor: the USB interface is available for AT commands, data
communication, FW upgrade by means of the FOAT feature, FW upgrade by means of the u-blox
EasyFlash tool and for diagnostic purpose.
The module itself acts as a USB device and can be connected to a USB host such as a Personal
Computer or an embedded application microprocessor equipped with compatible drivers.
The USB_D+ / USB_D- lines carry the USB serial bus data and signaling, providing all the
functionalities for the bus attachment, configuration, enumeration, suspension or remote wakeup
according to the Universal Serial Bus Revision 2.0 specification
☞
The VUSB_DET functionality is not supported by all the TOBY-L2 modules product versions: the
pin should be left unconnected or it should not be driven high by any external device, because a
high logic level applied to the pin will represent a module switch-on event (additional to the ones
listed in section
) and will prevent reaching the minimum possible consumption with power
saving enabled.
☞
The VUSB_DET pin is not available on MPCI-L2 series modules.
The USB interface is controlled and operated with:
AT commands according to 3GPP TS 27.007
u-blox AT commands
☞
For the complete list of supported AT commands and their syntax see u-blox AT Commands
Manual
TOBY-L2 and MPCI-L2 modules provide by default the following USB profile with the listed set of USB
functions:
1 RNDIS for Ethernet-over-USB connection
1 CDC-ACM for AT commands and data communication