Ublox TOBY-R2 Series System Integration Manual

Also see for TOBY-R2 Series: User guide

Contents

Ublox TOBY-R2 Series System Integration Manual Manual pdf 51 page image

TOBY-R2 series - System integration manualUBX-16010572 - R10 System description Page 51 of 151☞ “GNSS Tx data ready” and “GNSS RTC sharing” functions are not supported by all u-blox GNSSreceivers HW or ROM/FW versions. Please see the GNSS implementation application note [13] orto the Hardware Integration Manual of the u-blox GNSS receivers for the supported features.As additional improvement for the GNSS receiver performance, the V_BCKP supply output of thecellular modules can be connected to the V_BCKP supply input pin of u-blox positioning chips andmodules to provide the supply for the GNSS real time clock and backup RAM when the VCC supply ofthe cellular module is within its operating range and the VCC supply of the GNSS receiver is disabled.This enables the u-blox positioning receiver to recover from a power breakdown with either a hot startor a warm start (depending on the duration of the GNSS receiver VCC outage) and to maintain theconfiguration settings saved in the backup RAM.1.9.4 SDIO interface☞ Secure Digital Input Output interface is not supported by TOBY-R2 series modules “02” / "42" / "82"product versions.TOBY-R2 series modules include a 4-bit Secure Digital Input Output interface (SDIO_D0, SDIO_D1,SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD) designed to communicate with an external u-blox shortrange Wi-Fi module: the cellular module acts as an SDIO host controller which can communicate overthe SDIO bus with a compatible u-blox short range radio communication Wi-Fi module acting as SDIOdevice.The SDIO interface is the only one interface of TOBY-R2 series modules dedicated for communicationbetween the u-blox cellular module and the u-blox short range Wi-Fi module.The AT commands interface is not available on the SDIO interface of TOBY-R2 series modules.Combining a u-blox cellular module with a u-blox short range communication module gives designersfull access to the Wi-Fi module directly via the cellular module, so that a second interface connectedto the Wi-Fi module is not necessary. AT commands via the AT interfaces of the cellular module allowsa full control of the Wi-Fi module from any host processor, because Wi-Fi control messages arerelayed to the Wi-Fi module via the dedicated SDIO interface.u-blox has implemented special features in the cellular modules to ease the design effort for theintegration of a u-blox cellular module with a u-blox short range Wi-Fi module to provide Routerfunctionality.Additional custom function over GPIO pins is designed to improve the integration with u-blox Wi-Fimodules: Wi-Fi enable Switch-on / switch-off the Wi-Fi☞ Wi-Fi enable function over GPIO is not supported by TOBY-R2 series modules “02” / "42" / "82"product versions.