Host Interface 9 (114)
3.1.3 Stand-Alone Shift Register Interface
In this mode the Anybus CompactCom M40 operates stand-alone, with no host processor.
Process data is communicated to the shift registers on the host.
3.1.4 Serial Interface (UART)
The serial interface is provided for backward compatibility with the Anybus CompactCom 30.
The interface is event based, and it is not recommended to use it with an Anybus CompactCom
M40 module as it can not take advantage of the greater performance of the 40-series. For more
information about the serial interface, see the Anybus CompactCom M30 Hardware Design
Guide.
3.1.5 LED Interface
Network status LED output signals are available in all operating modes except 16-bit parallel
mode. The status of the network LEDs is always available in the LED status register for all
modes, see Anybus CompactCom 40 Software Design Guide for more information.
3.1.6 Reduced Media-Independent Interface (RMII)
This interface is used for Transparent Ethernet, where Industrial Ethernet communication is
handled by the Anybus CompactCom and other Ethernet communication is routed to the host
application. 16–bit parallel mode and the LED Interface signals are not available when
Transparent Ethernet is enabled.
See RMII — Reduced Media-Independent Interface, p. 17for mor information.
Anybus
®
CompactCom
™
M40 Hardware Design Guide HMSI-216-126 EN 2.6
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