cn8236 Mindspeed Technologies, cn8236 Datasheet - Page 198
cn8236
Manufacturer Part Number
cn8236
Description
Atm Servicesar Plus With Xbr Traffic Management
Manufacturer
Mindspeed Technologies
Datasheet
1.CN8236.pdf
(443 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
cn8236EBGB
Manufacturer:
VIA
Quantity:
150
Company:
Part Number:
cn8236EBGB
Manufacturer:
CONEXANT
Quantity:
329
- Current page: 198 of 443
- Download datasheet (5Mb)
6.0 Traffic Management
6.3 ABR Flow Control Manager
6-30
Table 6-5. ABR Cell Type Decision Vector (ACDV)
an in-rate Forward RM cell is transmitted, FWD_INDEX is copied to
CELL_INDEX; otherwise, CELL_INDEX is incremented by one
(CELL_INDEX++). Therefore, the number of blocks in a Decision table is
bounded by the maximum number of cell decisions made between transmitted
Forward RM cells, typically Nrm.
APPLICATION EXAMPLE: Cell Decision Table for Nrm = 32
table, the FWD_INDEX ACDB, is located at index 100 of the ABR
Decision table. Whenever a Forward RM cell is sent, this ARCB serves as
the reset point for the decision state machine. When
CELL_INDEX = FWD_INDEX, a steady state ABR channel transmits a
Backward RM cell and advances the CELL_INDEX. The diagram shows
the next ACDB (101) in more detail. It contains the 16 Cell Type Actions
(For example, BRM = Send Backward RM). At the next cell transmission
opportunity, the ABR Flow Control Manager state machine selects a cell
type by indexing into the ACDB according to the ACDV. In this case, the
only condition present is RUN = 1, so ACDV = 0001b. Cell Type Action
Index 1 is selected. For this ACDB, Cell Type Action 1 is DATA or Send
Data Cell. Therefore, the CN8236 transmits a user data cell.
131. This ACDB transmits a Forward RM Cell under all circumstances.
Therefore, the CN8236 resets the CELL_INDEX for this VCC to
FWD_INDEX = 100, when it reaches this ACDB.
CN8236 would transmit a Forward RM cell, and the sequence would
continue from the FWD_INDEX.
3
2
1
0
Bit
The SAR updates the CELL_INDEX field after each cell decision is made. If
Figure 6-17
In steady state, CELL_INDEX is incremented until it reaches ACDB
In this example, the host should initialize CELL_INDEX to 131. The
TRM_EXP
TA_PND
TA_XMIT
RUN
Mindspeed Technologies
Name
shows a typical Cell Decision table. The anchor of the
Time since last forward RM transmitted >= TRM
TA_PND bit set in VCC table entry
TA_XMIT bit set in VCC table entry
RUN bit set in VCC table entry
ATM ServiceSAR Plus with xBR Traffic Management
™
Description
28236-DSH-001-B
CN8236
Related parts for cn8236
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Framer SDH ATM/POS/STM-1 SONET/STS-3 3.3V 272-Pin BGA
Manufacturer:
Mindspeed Technologies
Part Number:
Description:
RS8234EBGC ATM XBR SAR
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
ATM SAR 155Mbps 3.3V ABR/CBR/GFR/UBR/VBR 388-Pin BGA
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
ATM IMA 8.192Mbps 1.8V/3.3V 484-Pin BGA
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
ATM SAR 622Mbps 3.3V ABR/CBR/GFR/UBR/VBR 456-Pin BGA
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
RS8234EBGD ATM XBR SAR, ROHS
Manufacturer:
Mindspeed Technologies
Part Number:
Description:
3-PORT T3/E3/STS-1 LIU WITH/ DJAT IC (ROHS)
Manufacturer:
Mindspeed Technologies
Part Number:
Description:
ATM IMA 800Mbps 1.8V/3.3V 256-Pin BGA
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Framer SDH ATM/POS/STM-1 SONET/STS-3 3.3V 272-Pin BGA
Manufacturer:
Mindspeed Technologies
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet:
Part Number:
Description:
Manufacturer:
Mindspeed Technologies
Datasheet: