
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
PM7340 S/UNI-IMA-8
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
176
Others: reserved
This field is cleared by PM during link
record initialization.
26:16
RESERVED
15
TX_LINK_TIMER_E
N
TX link timer enable. The enable bit is
set when the timer is loaded; it is
cleared when either a timeout occurs
or the timer is disabled.
14:12
RESERVED
11:8
TX_LINK_TIMER
TX link timer. Implemented as 4-bit
down counter. The counter is loaded
with the appropriate timeout value
when the timer is enabled, and
decrements on every timer tick, until it
reaches zero. A timeout event is
declared when a timer tick occurs and
the counter equals zero, if the timer is
enabled.
7
RESERVED
6:4
FE_RX_LSM
Far end RX LSM state for the link.
This is copied from the appropriate TX
LSM state field in the incoming ICP
cells.
3
TX_LINK_PM_UNU
SABLE
This field indicates the link has been
considered unusable by PM.
This bit is set up on PM issuing
UNUSABLE_LINK command, and
cleared up on PM issuing
RECOVER_LINK command.
This field is programmed by PM
during link record initialization.
This field will remain at its current
value during a group-restart.
2:0
TX_LINK_PM_UNU
SABLE_CAUSE
Cause specified by PM for the link to
be unusable. This field is used by
RIPP to notify FE.