pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 75

• Manufacturer Part Number: pef20320
• Description: Multichannel Network Interface Controller For Hdlc With 32 Channels
• Manufacturer: Infineon Technologies Corporation

Monitoring functions are implemented in MUNICH32 to discover errors or condition
changes, i.e.
– Receive frame end
– Receive frame abort by overflow of the receive buffer or hold condition or recognized
– Frame overflow, if a frame has to be discarded because of pending inaccessibility of
– Transmit frame end
– Transmit frame abort (data underrun) by underrun of the transmit buffer or hold
– Change of the interframe time-fill.
– Loss of synchronism or change of framing bits (V.110, X.30).
– Short frame with no data content detected.
An error or condition change is indicated by an interrupt. The host may react to the
interrupt by either aborting or tristating the specific channel or with a channel
reconfiguration. To prevent underrun of the transmit buffer sufficient buffer size has to
be allocated to the channel.
A more detailed discussion of the receive procedure with examples is provided under the
detailed protocol description in Chapter 2.4.
User’s Manual
ABORT flag
the chip memory
condition or bus cycle error
75
Functional Description
PEB 20320
01.2000