NEC mPD98410 User Manual page 140

Even if a cell is discarded because of the class of threshold value masked by the EXTHMS register, it is not
reflected on the EXTH register. Nor is the EX bit of the status register set.
bit [31 through 25, 23, 19, 17, 16] OM, OE, ON, OC, TM, TE, TN, MM, QM, QN, QC
0: Indicates that the corresponding class did not bring about discarding a cell first.
1: Indicates that the corresponding class did bring about discarding a cell first.
bit [14, 12 through 8] UB, AB, NV, RM, RV, CB
0: Indicates that the corresponding class did not bring about discarding a cell first.
1: Indicates that the corresponding class did bring about discarding a cell first.
Field Bit
OM bit [31]
OE bit [30]
TE bit [26]
ON bit [29]
OC bit [28]
TM bit [27]
TN bit [25]
MM bit [23]
OF bit [20]
QM bit [19]
140
CHAPTER 4 INTERNAL REGISTERS
R/W
R Indicates that a cell has been discarded because the output queue
exceeds OQthCBR, OQthRVR, OQthRM, OQthNVR, OQthABR, or
OQthUBR threshold value.
R These bits simultaneously indicate that the packet of the channel
set for EPD is discarded because of EPD control because the
output queue exceeds OQthAEP or OQthUEP threshold value or
that the UC (Used Cell) counter exceeds UCthAEP or UCthUEP
R
threshold value. There is no functional difference between the OE
and TE bits.
R Indicates that the cell of the channel not set for EPD is discarded
because the output queue exceeds OQthAEP or OQthUEP
threshold value.
R Indicates that the cell set for CLP is discarded because the output
queue exceeds OQthCCL, OQthRCL, OQthACL, or OQthUCL
threshold value.
R Indicates that a cell is discarded because the UC (Used Cell)
counter exceeds UCthCBR, UCthRVR, UCthRM, UCthNVR,
UCthABR, or UCthUBR threshold value.
R Indicates that the cell of the channel not set for EPD is discarded
because the UC (Used Cell) counter exceeds UCthAEP or
UCthUEP threshold value.
R Indicates that a multi-cast cell is discarded because the multi-cast
queue exceeds MQthCRV, MQthRNV, MQthABR, or MQthUBR
threshold value.
R Indicates that EFCI marking is performed because the output queue
exceeds OQthRCI, OQthACI, or OQthUCI threshold value during
queuing or re-queuing of multi-cast.
Remark This bit is used for testing. Do not use it because it may
be deleted in the future.
R Indicates that a cell is discarded because the output queue exceeds
OQthCBR, OQthRVR, OQthRM, OQthNVR, OQthABR, or
OQthUBR threshold value during re-queuing of multi-cast, or the UC
(Used Cell) counter exceeds UCthCBR, UCthRVR, UCthRM,
UCthNVR, UCthABR, or UCthUBR threshold value.
Function Default Value
0
0
0
0
0
0
0
0
0
0