
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
175
10:15
31:0
RESERVED
RIPP TX Link Context Record Memory Area
The TX link context record area is located in the RIPP context memory. There are
8 TX link context records that contain the current state machine states and status
information for the corresponding TX links. Each record is 2 words deep by 32
bits wide, and is addressed by the physical link number.
MEM_ADDR = Area_base_address + physical link number * 0x2 + Word Offset
Unless otherwise specified, all the data fields and the reserved fields should be
cleared (to all ‘0’s) by PM prior to adding the link, and will be internally cleared by
RIPP during a group-restart.
Table 13
RIPP TX Link Context Record Structure
WORD
BIT
DATA FIELD
DESCRIPTION
0
31
TX_LINK_EN
Flag bit indicating whether the link is
enabled or not.
“0”: not enabled, link in UNASSIGNED
state
“1: enabled.
This field is set by RIPP during
add_link or add_group command
processing. It is cleared by RIPP upon
finishing deleting the link. It may be
polled by PM to determine the
progress of link addition or deletion.
This field will remain at its current
value during a group-restart.
30:27
TX_LSM
TX Link state machine state.
“0000”: DELETED(NOT_IN_GROUP)
“0010”: UNUSABLE
“1100”: USABLE
“1110”: ACTIVE