User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
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8.3.2. I2C - Inter-integrated Circuit
The LE940B6 I2C is an alternate function of GPIO 1-15 pins. Available only from Modem side as
SW emulation of I2C on GPIO lines. Any GPIO can be configured as SCL or SDA. LE940B6 supports
I2C Master Mode only.
NOTE:
SW emulated I2C on GPIO lines is supported only from the modem side. For more information,
refer to Ref 1: LE940B6 AT Command Reference Guide for command settings.
8.4. Ethernet Interface
The LE940B6 has an integrated Ethernet interface to an external Ethernet PHY supporting 10M /
100M and 1G speed modes via a RGMII interface.
The Ethernet interface is target to be compliant with the RGMII and RMII specifications. The
supported RGMII and RMII specification versions are:
• RGMII: Version 1.3, dated 12/10/2000, supporting up to 1000 Mbps operation
• RMII: Version 1.2, dated 03/20/1998, supporting up to 100 Mbps operation
NOTE:
Customer should carefully design the Ethernet interface depending on PHY chipset; Please
contact Telit R&D for more details and guidelines.
Table 30: Ethernet Interface
PAD Signal I/O Function Type COMMENT
G14 MAC_MDC O Management Data Clock 2.5/3.3V
G12 MAC_MDIO I/O Management Data I/O 2.5/3.3V
V16 MAC_TXD[0] O RGMII or RMII TXD[0] 2.5/3.3V
T16 MAC_TXD[1] O RGMII or RMII TXD[1] 2.5/3.3V
R16 MAC_TXD[2] O RGMII TXD[2] 2.5/3.3V
N16 MAC_TXD[3] O RGMII TXD[3] 2.5/3.3V
L16 MAC_GTX_CLK O RGMII Transmit Clock 2.5/3.3V
G16 MAC_TXEN_ER O RGMII Transmit Enable /Error or
RMII Transmit Enable
2.5/3.3V