CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 106

• Manufacturer Part Number: CN8237EBGB
• Description: ATM SAR 622Mbps 3.3V ABR/CBR/GFR/UBR/VBR 456-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of CN8237EBGB

• Package: 456BGA
• Traffic Class: ABR|CBR|GFR|UBR|VBR
• Utopia Type: Level 1|Level 2
• Host Interface: PCI
• Maximum Data Rate: 622 Mbps
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3.135 V

Table 4-22. Segmentation Status Queue Format for ACR/ER (32-bit)
4.0 Segmentation Coprocessor
4.3 Segmentation Control and Data Structures
Table 4-23. Status Queue Entry Field Descriptions for ACR/ER
4-26
Word 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ER
ACR
VLD
NCR
SRC_NOT_DEST
OVFL
SEG_VCC_INDEX
Reserved
0
1
4.3.6.2 Status Queue
Field Name
Management
For SRC_NOT_DEST = 0, reflects TA_ER, current ER field in BCK RM cell. Not valid for
SRC_NOT_DEST = 1.
For SRC_NOT_DEST = 0, reflects TA_CCR current CCR field in BCK RM cell.
For SRC_NOT_DEST = 1, reflects current CCR field in FWD RM cell.
Entry valid. Written to 1 by the SRC. Written to 0 by the host.
When set to a 1, indicates that status entry is an ACR Notification status entry.
A value of 1 indicates a source ACR change notification.
A value of 0 indicates a destination ACR change notification.
Overflow: status entry is last entry available.
Segmentation VCC index for buffer.
Always set to 0.
At initialization, the host assigns the location and size of up to 32 queues by
initializing internal registers, the segmentation status queue base table entries.
The location and size of each queue is independently programmable via these
base tables.
in the queues with fields in the base table entries. The host manages the queues as
write-only status queues. The status queue base table entry contains all of the
SAR’s write-only control variables.
ER
The SAR tracks its current position and the most recent known host position
Tables
Reserved
Mindspeed Technologies
4-24, 4-25, and
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
4-26
describe the format of these entries.
Description
™
SEG_VCC_INDEX
ACR
28237-DSH-001-C
CN8237