XRT4000 Datasheet, PDF (29/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

XRT4000
Operating Modes for the XRT4000 Device
The XRT4000 Multiprotocol Serial Interface
device can be configured to operate in a
wide variety of modes or “scenarios”. This
document illustrates some of these
“scenarios” and provides the reader with the
following information associated with each of
these scenarios.
• Which pins (on the “DCE Mode” XRT4000
and “DTE Mode” XRT4000 devices) are
used to propagate various data or clock
signals.
• Which signals are to be used when
operating the XRT4000 devices in the
“differential” or “single-ended” modes.
• How does one configure the “DCE Mode”
and “DTE Mode” XRT4000 device to
operate in these scenarios.
Notes:
1. The “line” signals are drawn with both a
“solid” line and a “dashed” line. Both lines
are used to transmit and receive “differential”
mode signals. However, the “solid” line
indentifies the signal that should be used,
when operating the Transmitter in the
“Single-Ended” mode.
2. Each scenarios includes a table that indicates
how to configure the XRT4000 device into
each of these modes, by specifying the
appropriate logic states for EC*, 2CK/3CK*,
LP*, CKINV*, DTINV*, and EN_OSC*.
3. In all, 48 scenarios have been defined for the
XRT4000 device. Currently, this document
only lists a subset of these scenarios.
Further versions of the XRT4000 data sheet
will include this information for all 48
scenarios.
Rev. 1.00
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