pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 385

• Manufacturer Part Number: pef2256e
• Description: E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
• Manufacturer: Infineon Technologies Corporation

Pulse Count Recovery (Read/Write)
Value after reset: 00
PCR
PCR(7:0)
User’s Manual
Hardware Description
PCR7
7
Pulse Count Recovery
A LOS alarm (red alarm) is cleared if a pulse-density is detected in the
received bit stream. The number of pulses M which must occur in the
predefined PCD time interval is programmable by the PCR register
and can be calculated as follows:
M = N+1; with 0 ≤N ≤255.
The time interval starts with the first detected pulse transition. With
every received pulse a counter is incremented and the actual counter
is compared to the contents of PCR register. If the pulse number
reaches or exceeds the PCR value the LOS alarm is reset otherwise
the alarm stays active. In this case the next detected pulse transition
starts a new time interval.
An additional loss-of-signal recovery condition is selected by register
LIM2.LOS1.
H
385
DS1.1, 2003-10-23
T1/J1 Registers
PEF 2256 H/E
PCR0
0
FALC
(39)
®
56