cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 174

• Manufacturer Part Number: cx28560
• Description: Hdlc Controller
• Manufacturer: Mindspeed Technologies

Basic Operations
7.3.4.2
7.3.4.3
7.3.5
7.3.5.1
7-16
Receive Errors
Transmit Change Of Frame Alignment (COFA)
Reason:
Effects:
Channel-Level Recovery Actions:
Buffer Controller Channel FIFO Overflow (BOVFLW)
Reason:
Effects:
Channel-Level Recovery Actions:
Receive errors are service-affecting and may require a corrective action by the host to
resume normal processing.
Receive Overflow (BUFF)
Same as HDLC mode.
Reasons:
Effects:
• Signal failure, glitch, or realignment caused by the physical interface sourcing
• Causes serial interface to enter COFA condition until a TSYNC/TSTB pulse
• For every active channel on the respective port, TSLP places channels into the
• Transmit output is three-stated.
• Transmit channel reactivation is required.
• Degradation of the host subsystem or application software.
• Incorrect calculation of the size of internal FIFO required.
• Semi-deactivation of the channel. No further data will be transmitted on the
• The affected channel should be deactivated and reactivated if required.
• Degradation of the host subsystem performance. This will be caused by host
• Size of RBUFFC internal FIFO insufficient.
• RxBUFF Interrupt (if BUFFIEN = 1 in
• Data received during an overflow condition is discarded.
the TSYNC/TSTB input signal.
arrives and is followed by at least the assigned number of time slots for this
port, without another unexpected TSYNC/TSTB pulse.
deactivate state, wherein TSLP sends a repetitive all 1s sequence.
channel, and, if the overflow occurred mid-message, the last message in the
internal FIFO that was stored before the overflow occurred will be aborted.
assertion of back-pressure on the Data POS-PHY, not allowing the RBUFFC
to transmit the data to the host, thus filling the receive buffers.
Configuration register).
Mindspeed Technologies™
Advance Information
Chapter
5.0, RSLP Channel
CX28560 Data Sheet
28560-DSH-001-B