cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 153

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

Channel Level Recovery Actions:
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8.2.9.3
Out-of-frame or loss-of-frame indicates the entire, or partial, receive serial data stream is invalid and only time slots
marked with OOF from that port should be ignored.
Reason:
•
Effects:
•
•
•
•
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Channel Level Recovery Actions:
•
8.2.9.4
In this case, the Frame Check Sequence (FCS) which CX28500 calculated for the received HDLC message does
not match the FCS located within the message.
Reason:
•
Effects:
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•
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Channel Level Recovery Actions:
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28500-DSH-002-C
None required.
ROOF input pin is asserted (high) because the attached physical layer device is unable to recover a valid,
framed signal.
OOF Interrupt (if OOFIEN = 1 and OOFABT = 1 in
If bit field OOFABT = 0, RSLP and RDMA continue as if no errors and transfer received data into shared
memory buffers normally.
If bit field OOFABT = 1 and a receive message is in-progress, the current message is ended with OOF status
and RSLP scans for the opening flag of the next HDLC message. When the in-progress message reaches the
top of the internal FIFO, the entire message is copied to shared memory buffers and the Buffer Status
Descriptor is written (if INHRBSD = 0 in
RDMA is not affected and continues shared memory buffer processing.
Receive channels recover automatically when the ROOF input pin is deasserted (low), indicating the OOF
condition has ended.
None required.
Bit errors during transmission.
When the message reaches the top of the internal FIFO, the entire HDLC message is copied to shared
memory buffers and the Buffer Status Descriptor is written (if INHRBSD = 0 in
with ONR = HOST, ERROR = FCS.
EOM Interrupt with RxFCS error status, (if ERRIEN = 1 in
The RSLP scans for the opening flag of the next HDLC message.
RDMA is not affected and continues shared memory buffer processing.
None required.
Out Of Frame (OOF)
Frame Check Sequence (FCS) Error
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Section
6.6.5) with ONR = HOST and ERROR = OOF.
Table 6-28, RSIU Port Configuration
Section 6.6.4
®
and
Section
Section 6.6.4
6.7.4).
Register).
Basic Operations
and
Section
6.7.4)
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