cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 172

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

Basic Operations
7.3.2
7.3.2.1
7.3.3
7.3.3.1
7-14
Transmit Events
Receive Events
resynchronizes the start of the next message transmission to the time slot marked as
the first time slot on that channel.
If an abort is requested, and the previous message had been aborted and no new data had
been received, the abort command is simply ignored and the CX28560 awaits new data.
The host may set EOM = 1 in any transmit fragment to separate this transparent mode
“message” from the next message, according to the IC and PADCNT bit fields. Unlike
HDLC mode, the number of pad fill octets transmitted equals PADCNT + 1, and no
flag characters are inserted.
Transmit events are informational in nature and require no recovery actions.
End Of Message (EOM)
Reason:
TSLP has transmitted (actually, transferred to the TSIU) the last bit of a data buffer and
the Transmit Fragment header signified the end of a message with bit field EOM = 1.
Effects:
Receive events are informational in nature and require no recovery actions.
End Of Message (EOM)
Reason:
Effects:
• TxEOM interrupt (if EOMIEN = 1 in
• TSLP and TBUFFC continue normal message processing. If the TBUFFC does
• RSLP must force an end of a message due to a receive error condition. Error
• RxEOM interrupt (if ERRIEN = 1 in
• RBUFFC sets bit field EOM = 1 in Receive Buffer Status Descriptor (if
• RSLP continues normal processing after the error condition has ended.
• RBUFFC is not affected and continues shared memory buffer processing.
Configuration register).
not receive more data before the internal channel FIFO becomes empty and the
TSLP needs to output another data bit, TSLP outputs pad fill octets until more
data is available.
conditions include Overflow, COFA, or OOF.
Configuration register) with the appropriate RxERR status.
INHRBSD = 0 in
Mindspeed Technologies™
Advance Information
Chapter
5.0, RSIU Time Slot Configuration register).
Chapter
Chapter
5.0, RSIU Time Slot
5.0, TSLP Channel
CX28560 Data Sheet
28560-DSH-001-B