peb20532 Infineon Technologies Corporation, peb20532 Datasheet - Page 220
peb20532
Manufacturer Part Number
peb20532
Description
2 Channel Serial Optimized Communication Controller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20532.pdf
(282 pages)
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Data Sheet
RDO
RFO
PCE
FERR
Receive Data Overflow Interrupt
This bit is set to ’1’, if receive data of the current frame got lost because
of a SCC receive FIFO full condition. However the rest of the frame is
received and discarded as long as the receive FIFO remains full and is
stored as soon as FIFO space is available again. The receive status byte
(RSTA) of such a frame contains an ’RDO’ indication. In DMA operation
the ’RDO’ indication is also set in the receive byte count register RBCH.
Receive FIFO Overflow Interrupt
HDLC Mode:
This bit is set to ’1’, if the SCC receive FIFO is full and a complete frame
must be discarded. This interrupt can be used for statistical purposes,
indicating that the host was not able to service the SCC receive FIFO
quickly enough, e.g. due to high bus latency.
ASYNC/BISYNC Mode:
This bit is set to ’1’, if the SCC receive FIFO is full and another received
character has been discarded. This interrupt can be used for statistical
purposes and might indicate that the host was not able to service the
SCC receive FIFO quickly enough, e.g. bus latencies are too high.
Protocol Error Interrupt
This bit is valid in HDLC Automode only.
It is set to ’1’, if the receiver has detected a protocol error, i.e. one of the
following events occured:
• an S- or I-frame was received with wrong N(R) counter value;
• an S-frame containing an Information field was received.
Framing Error Interrupt
This bit is set to ’1’, if a character framing error is detected, i.e. a ’0’ was
sampled at a position where a stop bit ’1’ was expected due to the
selected character format.
5-220
Register Description (ISR2)
(async mode)
PEB 20532
PEF 20532
(hdlc mode)
(hdlc mode)
(all modes)
2000-09-14
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