CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 106

• Manufacturer Part Number: CN8236EBGB
• Description: ATM SAR 155Mbps 3.3V ABR/CBR/GFR/UBR/VBR 388-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of CN8236EBGB

• Package: 388BGA
• Traffic Class: ABR|CBR|GFR|UBR|VBR
• Utopia Type: Level 1|Level 2
• Host Interface: PCI
• Maximum Data Rate: 155 Mbps
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3 V

Table 4-20. Segmentation Status Queue Entry
4.0 Segmentation Coprocessor
4.3 Segmentation Control and Data Structures
4.3.6 Segmentation Status Queues
Table 4-21. Segmentation Status Queue Entry Field Descriptions
4-28
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
USER_PNTR
VLD
NCR
STOP
DONE
SINGLE
OVFL
I_EXP
I_MAN
SEG_VCC_INDEX
0
1
4.3.6.1 Entry Format
Field Name
Copy of the USER_PNTR from the segmentation buffer descriptor. The SAR circulates this field from
the SBD without using it internally. In Message Mode, the SAR returns the USER_PNTR of the BOM
buffer. In Streaming Mode, the SAR returns the USER_PNTR of all buffers.
0 = Entry invalid. Indicates that the SAR has not written the entry and the host should halt status
processing.
1 = Entry valid. Indicates that the host may process the entry.
Written to 1 by the SAR. Written to 0 by the host.
When set to a 0, indicates a normal status queue entry.
VCC has stopped because no more segmentation data is available.
Set when buffer segmentation is complete and buffer is released to host.
Set if SINGLE option is set in the segmentation buffer descriptor.
Overflow: status entry is last entry available. (See Status Queue Overflow, below.)
Current I_EXP rate parameter of the VCC. This field is written only when VCC_INDEX(SCH_MODE) =
ABR. (See
The two MSBs of the current I_MAN rate parameter for the VCC. This field is written only when
VCC_INDEX(SCH_MODE) = ABR. (See
Segmentation VCC index on which the SAR transmitted the buffer or PDU.
The CN8236 reports segmentation status to the host on one of 32 status queues.
Each entry on the queue is two words.
of a standard SEG status queue entry. A second special status queue format for
ACR/ER change notification is described in
Section 6.3.7.5
status.
I_EXP
Chapter
Mindspeed Technologies
6.0.)
for a description of the trigger mechanism for posting special
Reserved
USER_PNTR
Chapter
ATM ServiceSAR Plus with xBR Traffic Management
Description
6.0.)
Tables 4-20
™
Tables 4-22
SEG_VCC_INDEX
and
4-21
and 4-23. Refer to
describe the format
28236-DSH-001-B
CN8236