peb2255 Infineon Technologies Corporation, peb2255 Datasheet - Page 136

• Manufacturer Part Number: peb2255
• Description: E1/t1/j1 Framer And Line Interface Component For Long And Short Haul Applications
• Manufacturer: Infineon Technologies Corporation

5.3.6
The transmit line monitor compares the transmit line pulses on XL1 and XL2 with the
transmit input signals received on pins XL1M and XL2M. The monitor detects faults on
the primary side of the transformer and protects the device from damage by setting the
transmit lines into high impedance state automatically. Faults on the secondary side can
not be detected. To detect shorts, the configuration shown in
provided and the default (reset) value of registers XPM0...2 must be selected. Otherwise
a short detection can not be guaranteed. Two conditions are detected by the monitor:
“Transmit Line Ones Density“ (more than 31 consecutive zeroes) and “Transmit Line
Shorted“. In both cases a transmit line monitor status change interrupt is provided.
Figure 50
Data Sheet
Transmit Line Monitor (T1/J1)
Transmit Line Monitor Configuration (T1/J1)
XL2M
XL1M
XL1
XL2
136
Line
Monitor
TRI
Functional Description T1/J1
XPM2.DAXLT/XLT
Pulse
Shaper
FALC -LH
Figure 50
XDATA
FALC-LH V1.3
R
ITS09746
PEB 2255
must be
2000-07