![](http://datasheet.mmic.net.cn/330000/PM7340_datasheet_16444385/PM7340_267.png)
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
250
Word Bits
Parameter
Description
1
31:16 IMA Mode Stuff
Event Count
or TC Mode User
Cell Count (upper
word)
)
IMA mode
: this field is indexed by the Physical
Link tag and is used to store a continuously
running count of the number of Stuff Events
inserted on the link. It is maintained by the
transmit engine and is read by the PM. This field
should only be reset when the link is not enabled.
TC mode
: this field is indexed by the TC tag
delivered by the IDCC and is used to store the
upper 16-bit word of a continuously running 32-
bit count of the total number of ATM user cells
sent on the link. It is maintained by the transmit
engine and is read by the PM. This field should
only be reset when the link is not enabled.
15:0
IMA mode Total
User Cell Count
or TC Mode User
Cell Count (lower
word)
)
IMA mode
: this field is indexed by the Physical
Link tag and is used to store a continuously
running count of the number ATM user cells
transferred on the link. It is maintained by the
transmit engine and is read by the PM. This field
should only be reset when the link is not enabled.
TC mode
: this field is indexed by the TC tag
delivered by the IDCC and is used to store the
lower 16-bit word of a continuously running 32-bit
count of the total number of ATM user cells sent
on the link. It is maintained by the transmit
engine and is read by the PM. This field should
only be reset when the link is not enabled.