PM7329 S/UNI-APEX-1K800
DATASHEET
PMC-2010141
ISSUE 2
ATM TRAFFIC MANAGER AND SWITCH
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
173
MPLWord
En (bit #)
Bits
Parameter
Description
7:0
ClassCLP1Thr
sh
EPD maximum threshold for CLP1 cells on a per-
Class basis. 4 bit logarithmic, 4 bit fractional
encoding.
33:26
Unused
Reserved
25:20
ClassCnt[17:1
2]
Last 6 bits of an 18 bit count of all cells in both class,
TxSlot (SFQ only) & VC queue. Used for congestion
control.
VC tear down and watch dog re-allocation will reduce
this count by VcQCLP01Cnt
Class tear down will set this parameters to zero.
19:18
Unused
Reserved
1
17:0
ClassHeadPtr Points to first Cell in linked list of Cell Records for
Class queue. A value of zero indicates that the queue
is empty; however, during shaping or VcMerge, it
does not indicate that the class is empty.
Class tear down will set this parameters to zero.
33:32
Unused
Reserved
31:20
ClassCnt[11:0] First 12 bits of an 18 bit count of all cells in both class
& VC queue. See MSB for description.
19:18
Unused
Reserved
2
17:0
ClassTailPtr
Points to last Cell in linked list of Cell Records for
Class queue.
Class tear down will set this parameters to zero.
3
33:0
Unused
Reserved
Note
Parameters in italics are active context information. Microprocessor must mask
these bits out during in-service context modification. During class setup, these
italicized parameters should be reset to zero.