PEF80912HV1.4XT Infineon Technologies, PEF80912HV1.4XT Datasheet - Page 58
PEF80912HV1.4XT
Manufacturer Part Number
PEF80912HV1.4XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.PEF80912HV1.4XT.pdf
(85 pages)
Specifications of PEF80912HV1.4XT
Lead Free Status / Rohs Status
Compliant
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3.2.1
For loopback #2 several alternatives exist. Both the type of loopback and the location
may vary. The following loopback types belong to the loopback-#2 category:
• complete loopback (B1,B2,D), in a downstream device
• B1-channel loopback, always performed in the U-transceiver
• B2-channel loopback, always performed in the U-transceiver
All loop variations performed by the U-transceiver are closed as near to the internal
IOM
Normally loopback #2 is controlled by the exchange. The maintenance channel is used
for this purpose. All loopback functions are latched. This allows channel B1 and channel
B2 to be looped back simultaneously.
3.2.1.1
When receiving the request for a complete loopback, the U transceiver passes it on to
the downstream device, e.g. the S-bus transceiver. This is achieved by issuing the C/I-
code AIL in the “Transparent” state or C/I = ARL in states different than “Transparent”
3.2.1.2
Single channel loopbacks are always performed directly in the U-Transceiver. No
difference between the B1-channel and the B2-channel loopback control procedure
exists.
Data Sheet
-2 interface as possible.
Loopback No.2
Complete Loopback
Loopback No.2 - Single Channel Loopbacks
50
Operational Description
PEF 80912/80913
2001-03-29
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