cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 160

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

8.3.5.2
Same as HDLC mode.
Reason:
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Effects:
•
•
•
•
Channel Level Recovery Actions:
•
8.3.5.3
Same as HDLC mode.
Reason:
•
Effects:
•
•
•
•
Channel Level Recovery Actions:
•
28500-DSH-002-C
Signal failure, glitch, or realignment caused by the physical interface sourcing the RSYNC or TSTB input
signal.
Causes serial interface to enter COFA condition until the RSYNC/TSTB pulse is followed by at least one frame
for this port, without another unexpected RSYNC/TSTB pulse.
Current message processing is ended for every active channel on this port. All data received prior to the COFA
condition is copied to shared memory buffers, and the Receive Buffer Status Descriptor is written with
ONR = HOST and ERROR = COFA (if INHRBSD = 0 in
this description happens when the COFA condition is detected within the first few bytes after channel activation
or after the channel suffered an overflow or another COFA, as described in
Receive COFA Interrupt (if COFAIEN = 1 in
condition ends, RSLP restarts data processing automatically; however, all time slots are ignored until reaching
the time slot marked “first.”
RDMA is not affected and continues shared memory buffer processing.
None required.
ROOF input pin is asserted (high) because the attached physical layer device is unable to recover a valid,
framed signal. Only time slots marked with an OOF assertion are affected, and not the whole port.
OOF Interrupt (if OOFIEN = 1 and OOFABT = 1 in
If bit field OOFABT = 0, RSLP and RDMA continue as if there are no errors and transfer received data into
shared memory buffers normally.
If bit field OOFABT = 1, all incoming data is replaced by all ones (0xFF) data sequence. Normal data
processing resumes when the ROOF input pin is deasserted (low), indicating the OOF condition has ended.
RDMA is not affected and continues shared memory buffer processing.
None required.
Receive Change Of Frame Alignment (COFA)
Out Of Frame (OOF)
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Table 6-28, RSIU Port Configuration
Table 6-28, RSIU Port Configuration
Section 6.6.4
®
and
Section
Section
6.7.4). The only exception to
Register). When the COFA
8.3.5.4.
Register).
Basic Operations
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