cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 168

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

Basic Operations
7.2.9.3
7.2.9.4
7-10
Channel-Level Recovery Actions:
Out-Of-Frame (OOF)
Out-of-frame or loss-of-frame indicates the entire receive serial data stream is invalid
and all data input from that port should be ignored.
Reason:
Effects:
Channel-Level Recovery Actions:
Frame Check Sequence (FCS) Error
In this case, the Frame Check Sequence (FCS) which the CX28560 calculated for the
received HDLC message does not match the FCS located within the message.
Reason:
Effects:
• Receive COFA Interrupt is generated (if COFAIEN = 1 in
• Normal operations continue after the COFA condition ends.
• RBUFFC is not affected and continues shared memory buffer processing.
• None required.
• ROOF input pin is asserted (high) because the attached physical layer device is
• OOF Interrupt (if OOFIEN = 1 and OOFABT = 1 in
• If bit field OOFABT = 0, RSLP and RBUFFC continue as if no errors and
• If bit field OOFABT = 1 and a receive message is in-progress, the current
• RBUFFC is not affected and continues shared memory buffer processing.
• Receive channels recover automatically when the ROOF input pin is
• None required.
• Bit errors during transmission.
• EOM Interrupt with RxFCS error status, (if ERRIEN = 1 in
• When the message reaches the top of the internal FIFO, the HDLC message is
INHRBSD = 0 in
5.0, TBUFFC Configuration register).
Port Configuration register). Note that a TSTB change of alignment causes
both a receive and a transmit COFA interrupt, since TSTB applies to both
transmit and receive directions simultaneously.
unable to recover a valid, framed signal.
Configuration register).
transfer received data to the host normally.
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 message is transferred to the host and the last Fragment
Header of the message is written ERROR = OOF.
deasserted (low), indicating the OOF condition has ended.
RBUFFC Configuration register and
register).
transferred to the host and the last Fragment Header is written with ERROR =
FCS.
Mindspeed Technologies™
Advance Information
Chapter
5.0, RBUFFC Configuration register and
Chapter
5.0, TBUFFC Configuration
Chapter
Chapter
Chapter
5.0, RSIU Port
CX28560 Data Sheet
28560-DSH-001-B
5.0, RSIU
Chapter
5.0,