DS92UT16 Datasheet, PDF (15/111 Pages) Texas Instruments – DS92UT16TUF UTOPIA-LVDS Bridge for 1.6 Gbps Bi-directional Data Transfers

OBSOLETE
DS92UT16
www.ti.com
SNOS992E – JANUARY 2002 – REVISED APRIL 2013
LOOPBACKS
To assist in diagnostic testing, the device provides both LVDS interface loopbacks and ATM cell loopbacks. The
former is suitable for designer or commission testing when the device is not passing live traffic. The latter allows
cell trace testing on live traffic. The ATM cell loopback operates by recognizing the user-defined cell header of
the special loopback cells. The available loopback options are shown in Table 10.
In addition to providing a live round trip test via the cell loopbacks, the DS92UT16 helps pinpoint failures
between transmit and receive paths by counting the number of loopback cells received.
All loopbacks are programmable via the microprocessor interface.
LineLB_LVDS
LocalLB_LVDS
Up2Down_ATM
Down2Up_ATM
Table 10. Loopback Options
Physical loopback at the LVDS interface. Loop entering LVDS traffic back out of the
device.
Physical loopback at the LVDS interface. Loop exiting LVDS traffic back into the
device.
ATM loopback. Route defined cell entering the device at the LVDS interface back out.
ATM loopback. Route defined cell entering the device at the UTOPIA interface back
out.
Figure 7. LVDS Interface and ATM Cell Loopback Options
Copyright © 2002–2013, Texas Instruments Incorporated
Product Folder Links: DS92UT16
Submit Documentation Feedback
15