Integration Manual

TSD-19090601 - R15 Contents Page 49 of 143
Tashang has implemented special features in the cellular modules to ease the design effort for the
integration of the TOBY-L3 cellular module with a u-blox short range radio communication module, to
provide Router functionality.
The cellular modules provide additional custom functions over GPIO pins to improve the integration with
u-blox short range radio communication modules (see section 1.13). GPIO pins can handle:
 “Wi-Fi enable” function provided by GPIO6, improving the power consumption of the short range radio
communication module: when the Wi-Fi functionality is not required, the external short range radio
communication module can be switched off by the cellular module
1.9.6 SGMII interface
TOBY-L3 series modules include an Ethernet Media Access Control (MAC) block supporting up to 1Gbit/s
data rate via a Serial Gigabit Media-Independent Interface compliant with the SGMII Version 1.8 specification
[8].
The module represents an Ethernet MAC controller, which can be connected to an external Ethernet physical
transceiver (PHY) chip for communication with a remote processor over Ethernet.
The following signals are provided for communication and management of an external Ethernet PHY:
 V_ETH Interface supply output
 SGMII_TX_P SGMII transmit-plus
 SGMII_TX_N SGMII transmit-minus
 SGMII_RX_P SGMII receive-plus
 SGMII_RX_N SGMII receive-minus
 ETH_INTR Ethernet Interrupt Input, from PHY to MAC (module input)
When this signal is high, it indicates an interrupt event in the PHY
 ETH_MDIO Management Data Input Output, bidirectional signal (module input/output)
 ETH_MDC Management Data Clock, from MAC to PHY (module output)