pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 338

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

PEB 20550
PEF 20550
Application Hints
5.8.4
Power and Clock Supply Supervision/Chip Version
Power and Clock Supply Supervision
The + 5 V power supply line (
V
) and the reference clock (RCL) are continuously
DD
checked by the ELIC for spikes that may disturb the proper operation of the ELIC. If such
an inappropriate clocking or power failure occurs, data in the internal memories may be
lost, and a reinitialization of the ELIC is necessary. An Initialization Request status bit
(VNSR:IR) can be interrogated periodically by the P to determine the current status of
the device.
In normal chip operation, the IR bit should never be set, not even after power on or when
the clock signals are switched on and off. The IR bit will only be set if spikes ( 10 ns)
are detected on the clock and power lines which may affect the data transfer on the ELIC
internal buses.
Semiconductor Group
338
01.96