PEB2254H-V14 Infineon Technologies, PEB2254H-V14 Datasheet - Page 43

• Manufacturer Part Number: PEB2254H-V14
• Manufacturer: Infineon Technologies

Specifications of PEB2254H-V14

• Operating Supply Voltage (typ): 5V
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

PEB 2254
General Functions and Device Architecture E1
Transmit Line Monitor
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 line driver XL1/2 automatically in a high impedance state. Faults on the
secondary side may not be detected. To detect a short the configuration in figure 15 and
the reset values of register XPM0-2 has to be fulfilled. Otherwise the short detection
could not be guaranteed. Two conditions will be 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 will be provided.
Figure 16
Transmit Line Monitor Configuration
2.1.3
Additional Functions
Idle Code Insertion
In transmit direction, the contents of selectable channels can be overwritten by the
pattern defined via register IDLE. The selection of “idle channels” is done by
programming the four-byte registers ICB1 … ICB4.
Transparent Mode
The described transparent modes are useful for loopbacks or for routing signaling
information through the system interface.
In receive direction, transparency for ternary or dual / single rail unipolar data is always
achieved if the receiver is in the synchronous state. In asynchronous state the data can
be transparently switched through if bit FMR2.DAIS and bit FMR2.RTM are set.
However, correct time-slot assignment can not be guaranteed due missing frame
alignment between line and system side.
Semiconductor Group
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11.96