TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R28
System description
Page 55 of 164
1.9.4
Secure Digital Input Output interface (SDIO)
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SDIO interface is not available on MPCI-L2 series modules.
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SDIO interface is not supported by TOBY-L2 “00”, “01”, “60” product versions.
TOBY-L2 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 short
range Wi-Fi module: the TOBY-L2 cellular module acts as an SDIO host controller which can
communicate over SDIO bus with compatible u-blox short range Wi-Fi module acting as SDIO device.
The SDIO interface is the only one interface of TOBY-L2 series modules dedicated for communication
between 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-L2 series modules.
The SDIO interface supports 50 MHz bus clock frequency, allowing a data throughput of 200 Mb/s.
Combining a u-blox cellular module with a u-blox short range communication module gives designers
full access to the Wi-Fi module directly via the cellular module, so that a second interface connected
to the Wi-Fi module is not necessary. AT commands via the AT interfaces of the cellular module
(UART, USB) allows a full control of the Wi-Fi module from any host processor, because Wi-Fi control
messages are relayed to the Wi-Fi module via the dedicated SDIO interface (for more details, see the
Wi-Fi AT commands in the u-blox AT Commands Manual
u-blox has implemented special features in the cellular modules to ease the design effort for the
integration of a u-blox cellular module with a u-blox short range Wi-Fi module to provide Router
functionality (for more details, see the Wi-Fi / Cellular Integration Application Note
Additional custom function over GPIO pins is designed to improve the integration with u-blox Wi-Fi
modules:
Wi-Fi enable
Switch-on / switch-off the Wi-Fi
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GPIOs are not supported by TOBY-L2 “00”, “01” and “60” product versions, except for the Wireless
Wide Area Network status indication configured on GPIO1 pin.
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GPIOs are not available on MPCI-L2 series modules.
1.10
Audio
1.10.1
Digital audio over I
2
S interface
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I
2
S digital audio interface is not available on MPCI-L2 modules.
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I
2
S digital audio interface is not supported by TOBY-L2 ’00‘, ’01‘, ’60‘, ‘L201-02’, ‘L220-62’ versions.
TOBY-L2 series modules include a 4-wire I
2
S digital audio interface (I2S_TXD data output, I2S_RXD
data input, I2S_CLK clock output, I2S_WA world alignment / synchronization signal output) that can
be configured by AT command for digital audio communication with external digital audio devices as
an audio codec (for more details see the u-blox AT Commands Manual
, +UI2S AT command).
