cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 163

• Manufacturer Part Number: cn8236
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8236
ATM ServiceSAR Plus with xBR Traffic Management
Table 5-31. Reassembly Status Queue Entry Descriptions (1 of 2)
28236-DSH-001-B
BD_PNTR
UU
CPI
CPCS_LENGTH
TRCC0
TRCC0+1
HEAD_VCC_INDEX
PDU_CHECKS
VCC_INDEX
VLD
AAL34
Field Name
Buffer descriptor pointer. In Message Mode, pointer to the first buffer descriptor in the linked list. In
Streaming Mode, pointer to an individual buffer descriptor.
AAL5 CPCS-UU field.
AAL5 CPCS-CPI field. In AAL0 PTI terminated mode, the least significant bit contains the most
significant bit of the total PDU length. The CPCS_LENGTH field contains the 16 least significant bits.
AAL5 CPCS-LENGTH field. In AAL0 PTI terminated mode, it is the 16 least significant bits of the total
PDU length. The CPI field contains the most significant bit.
PM total received cell count for CLP = 0.
PM total received cell count for CLP = 0+1.
AAL3/4 Head VCC table entry index. When CNT_ROVR = 1, AAL34 = 1, and FWD_PM = 0, this field
along with A3L2_ERR in the PDU_CHECKS field points to the MID that rolled over. This field is also
active when CNT_ROVR=0, AAL34=1, and FWD_PM=0.
Set various error flags related to PDUs.
MOD_ERROR= AAL3/4 CPCS-PDU is not 32-bit aligned.
BA_ERROR = AAL5: Indicates that the total PDU length exceeds maximum length when AUU = 1.
AL_ERROR = AAL3/4 AL field is not all 0s.
LEN_ERROR = Total CPCS-PDU length exceeds maximum length and not at end of message.
PAD_ERROR= PAD field length is not correct.
CPI_ERROR = CPI field is not all 0.
TAG_ERROR = AAL3/4 Btag and Etag fields in the CPCS-PDU do not match.
CRC_ERROR= AAL5 CPCS or OAM CRC error.
ST_EPD
SN_EPD
LI_EPD
LP
CI_LAST
CI
A3L2_ERR = When CNT_ROVR = 1, AAL34 = 1, and FWD_PM = 0, indicates which MIB counter
VCC index of channel. If the connection is AAL3/4 and a CRC10 or MID error has occurred, this index
points to a valid MID entry even though MID cannot be correctly resolved due to errors. In both cases,
CNT_ROVR is set and the index is only used to indicate an AAL3/4 connection.
Valid. Indication that status entry is valid. The host must set to 0 after processing status.
Indication that the status entry is relative to an AAL3/4 PDU. Also indicates that HEAD_VCC_INDEX
and A3L2_ERR fields are active.
NOTE(S):
This field is only active when FWD_PM = 0.
= AAL3/4 Segment Type error; causes EPD.
= AAL3/4 Sequence Number error; causes EPD.
= AAL3/4 SAR-PDU length error; causes EPD.
= Value of CLP header bit ORed across the CPCS-PDU.
= Value of the PTI[1] header bit in the last cell of the CPCS-PDU.
= Value of the PTI[1] header bit ORed across the CPCS-PDU.
AAL3/4: BASIZE field error occurred.
rolled over, based on these values:
0 = MID_ERR
1 = CRC10_ERR
2 = SN_ERR
3 = LI_ERR
4 = EOM_ERR
5 = BOM_SSM_ERR
Mindspeed Technologies
Description/Function
™
5.7 Reassembly Control and Data Structures
5.0 Reassembly Coprocessor
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