PEB2035-N Ver la hoja de datos (PDF) - Siemens AG
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PEB2035-N Datasheet PDF : 134 Pages
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PEB 2035
1.3 Pin Definitions and Functions (cont’d)
P-LCC
Pin No.
5
P-DIP Symbol
Pin No.
3
DFPY /
FREEZS /
AINT
Input (I)
Output (O)
O
Function
PCM 30: Doubleframe Parity
Even parity signal which supplements the number
of ones of a received doubleframe to an even
quantity. The parity signal is sent out during the
following doubleframe (data changes 4 SCLK
cycles before the next doubleframe begins).
PCM 24: Freeze Signaling
Synchronization status signal which informs the
signaling processor that current signaling should
be frozen. It goes active if
– one or more framing bit errors are found in a
superframe,
– loss of receiver synchronization, or
– a receive slip is detected.
It is cleared after an error-free superframe.
FREEZS will be inhibited by setting bit RC0.DFRZ.
During alarm simulation, this signal goes active
during simulation steps 2 and 6 if not disabled via
RCO.DFRZ.
Alarm Interrupt
Setting bit CCR.AINT switches the output to the
Alarm Interrupt function. It is triggered by any of
the alarm sources which are enabled via mask
bits. Acknowledging is done by writing a '1' to bit
LOOP.AIA.
Semiconductor Group
10
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