pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 196

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

PEB 20550
PEF 20550
Application Hints
The Monitor/Feature Control handler can be adjusted to operate according to the
– IOM-1 protocol (up to 1 byte, no handshake), the
– IOM-2 protocol (any number of bytes, handshake using the MR and MX bits) and to
the
– SLD protocol (up to 16 bytes in subsequent frames without handshake)
The Monitor/Feature Control handler is a dedicated unit that communicates only with
one IOM or SLD channel at a time. An address register selects one out of 64 possible
MF channels. A 16 byte bidirectional FIFO (MFFIFO) provides intermediate storage for
the data to be sent or received. The message transfer over the MF channel is always
half-duplex, i.e. data can either be sent at a time or received at a time. It should be noted
that if the IOM-2 protocol is selected, the actual message length i.e. the number of bytes
to be sent or received is unlimited and is not restricted by the MFFIFO size!
If non handshake protocols (IOM-1 and SLD) are used, the ELIC must always be the
master of the MF communication. Example: the ELIC programs and reads back the
coefficients of a SICOFI (PEB 2060) device.
If the handshake protocol is used (IOM-2), a balanced MF communication is also
possible: since the MF handler cannot be pointed to all IOM-2 channels at the same time,
the ELIC has implemented a search function that looks for active monitor transmit
handshake (MX) bits on all upstream IOM-2 channels. If an active channel is found, the
address is stored and an interrupt is generated. The MF handler can then be pointed to
that particular channel and the message transfer can take place.
Example: the ELIC reads an EOC message out of an IECQ (PEB 2091) device.
The Control/Signaling handler can be adjusted to handle the following types of
channels:
• 4 bit C/I channel (IOM-1 and digital IOM-2)
• 6 bit C/I or Signaling channel (analog IOM-2)
• 8 bit Signaling channel (SLD)
Semiconductor Group
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01.96