Ublox LISA-U100, Integration Manual

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LISA-U series - System Integration Manual
UBX-13001118 - R17 Advance information System description
Page 55 of 190
1.9 Serial communication
LISA-U modules provide the following serial communication interfaces where AT command interface and Packet-
Switched / Circuit-Switched Data communication are concurrently available:

One asynchronous serial interface (UART) that provides complete RS-232 functionality conforming to
ITU-T V.24 Recommendation [4], with limited data rate

One Inter Processor Communication (IPC) interface that includes a synchronous SPI-compatible interface,
with maximum data rate of 26 Mb/s

One high-speed USB 2.0 compliant interface, with maximum data rate of 480 Mb/s.
The LISA-U modules are designed to operate as an HSPA cellular modem, which represents the data circuit-
terminating equipment (DCE) as described by the
ITU-T V.24 Recommendation [4]. A customer application
processor connected to the module through one of the interfaces represents the data terminal equipment (DTE).
All the interfaces listed above are controlled and operated with:

AT commands according to 3GPP TS 27.007 [5]

AT commands according to 3GPP TS 27.005 [6]

AT commands according to 3GPP TS 27.010 [7]

u-blox AT commands
For the complete list of supported AT commands and their syntax see u-blox AT Commands Manual [3].
The module firmware can be upgraded over all the serial interfaces listed above by means of AT command (for
more details see section 3.1 as well as the
u-blox AT Commands Manual [3], +UFWUPD command).
The module firmware can be upgraded over the following serial interfaces using the u-blox EasyFlash tool:

The UART interface (only the
RxD
and
TxD
lines are needed)

The USB interface (all the provided lines VUSB_DET , USB_D+ and USB_D- are needed)
To directly enable PC (or similar) connection to the module for firmware upgrade using the u-blox
EasyFlash tool, provide direct access on the application board to the
VUSB_DET , USB_D+ and USB_D-
lines of the module (or to the RxD and TxD lines). Also provide access to the PWR_ON or the RESET_N
pins, or enable the DC supply connected to the
VCC
pin to start the module firmware upgrade (see
Firmware Update Application Note [18]).
The following sub-sections describe the serial interfaces configuration and provide a detailed description of each
interface for the application circuits.