cn8237 Mindspeed Technologies, cn8237 Datasheet - Page 144

no-image

cn8237

Manufacturer Part Number
cn8237
Description
Atm Oc-12 Servicesar Plus With Xbr Traffic Management
Manufacturer
Mindspeed Technologies
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
cn8237EBGB
Manufacturer:
CONX
Quantity:
260
Part Number:
cn8237EBGB
Manufacturer:
CONEXANT
Quantity:
246
Part Number:
cn8237EBGB
Manufacturer:
MINDSPEED
Quantity:
20 000
Part Number:
cn8237EBGB/28237G-12
Manufacturer:
MINDSPEED
Quantity:
20 000
Table 5-12. Reassembly VCC Table Descriptions (2 of 3)
5.0 Reassembly Coprocessor
5.7 Reassembly Control and Data Structures
5-36
ABR_CTRL
PDU_FLAGS
TOT_PDU_LEN
CRCREM
CCOUNT
TCOUNT
CBUFF_LEN
FW
STAT
BFR1
BFR0
CBUFF_PNTR
BOM_BD_PNTR
Field Name
Termination Cell count. Used in AAL0 to terminate packet. When PTI termination mode is enabled,
Set various control bits related to QFC. The QFC_CTRL field contains the following control bits:
ER_EN
ABR_VPC
Set various flags related to PDUs. The PDU_FLAGS field contains the following control bits:
CNT_ROVR = Indication that SERV_DIS counters have rolled over. The next status entry indicates
SFPD_PND = Status Full Packet Discard Pending. Set when status queue is full, and CPCS must be
EPD
CI
CLP
BFR_LOCAL = Buffer Local. If high, the current cell buffer is located in local memory; otherwise,
BD_LOCAL = Buffer Descriptor Local. If high, the buffer descriptors reside in local memory;
ACT_PDU
BOM_BUF
FFPD_PND = DMA FIFO buffer Full Packet Discard Pending.
Total PDU length in bytes.
Cycle Redundancy Check Remainder. CRC32 remainder used in AAL5 only.
the maximum total length of a CPCS-PDU is CCOUNT × 2 bytes. In fixed length mode, initialize to 1.
Termination Count. Used in AAL0 to determine the number of cells in a packet. If this field is 0 in
AAL0 mode, PTI termination mode is enabled.
Current buffer length. Unused space of the current buffer in bytes.
Firewall condition. Indicates that a firewall condition has occurred.
Status queue pool number.
COM free buffer queue pool number.
BOM free buffer queue pool number.
Current buffer pointer. Pointer to the current unused position of the cell buffer where cell payload
data may be written. In Logical FIFO Mode, the address of the FIFO.
BOM buffer descriptor pointer. Pointer to the BOM buffer descriptor.
CNT_ROVR
31
ER_EN
6
SFPD_PND
= Enable ER operation.
= Indicates ER connection is VPC (0 indicates VCC). For VPC operation, all VCC entries
= Early Packet Discard Flag. Set when EPD occurs on a channel. Cleared when new
= Congestion Indication. PTI[1] header bit ORed across the CPCS-PDU.
= Cell Loss Priority. CLP header bit ORed across the CPCS-PDU.
= Active PDU. Indication that at least one buffer has been taken off of the free buffer
= BOM buffer flag. Set high when filling the first buffer of a PDU.
in the VPC group except VCI = 6, must be initialized with VPC_INDEX pointing to the
VCC entry corresponding with VCI = 6. The VCI = 6 entry contains the integrated EFCI
bit over the VPC group. Also, all entries in the VPC group including VCI = 6 must set
the ABR_VPC bit to a logic high.
this condition.
discarded when status entries available.
packet starts and error condition cleared.
host memory. SAR maintains this bit.
otherwise, host memory. SAR maintains this bit.
queue for the current PDU being received.
Mindspeed Technologies
30
Reserved
EPD
29
5
28
CI
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
CLP
ABR_VPC
27
Description/Function
4
BFR_LOCAL BD_LOCAL
26
Reserved
3
25
Reserved
2
ACT_PDU
24
Reserved
BOM_BUF
1
28237-DSH-001-C
23
Reserved
FFPD_PND
CN8237
0
22

Related parts for cn8237