CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 202

• 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

6.0 Traffic Management
6.3 ABR Flow Control Manager
Figure 6-19. RR RATE_INDEX Candidate Selection
6-34
RR
ACR - (ACR*RDF)
ACR-(ACR*RDF)
ACR
Backward RM cell into rate index space. This mapping converts the floating point
ER field rate representation to an absolute rate index. This mapping does not
depend on the current rate of the connection. The CN8236 maps ER field to rate
indexes with a programmable piece-wise linear function. Each piece-wise linear
segment is described in the ABR Exponent table. Again, the system designer
pre-calculates this mapping function to eliminate real-time floating point math.
The CN8236 calculates the ER candidate by mapping the ER field from the
Mindspeed Technologies
CANDIDATE
INDEX
RR
ATM ServiceSAR Plus with xBR Traffic Management
CONNECTION STATE (RATE_INDEX)
™
(COMPLIANT
RELATIVE
RATES)
ACR*RDF
28236-DSH-001-B
CN8236
8236_051