CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 224

• 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 6-25. ABR Rate Decision Block (ARDB)
6.0 Traffic Management
6.5 Traffic Management Control and Status Structures
6-56
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
Table 6-26. ARDB Field Descriptions
0
1
2
3
4
5
6
7
ACR_EN
CONG_EN
TA_OOR
SET_OOR
L_EXP
L_MAN
I_EXP
I_MAN
CONG_ER
ACR
ACR_INDEX
ACR_TO
NEW_RATE7 -
NEW_RATE0
Field Name
L_EXP
ACR “Use-It-Or-Lose-It” behavior enabled on rate.
Enable congestion rate adjustment on rate.
Out of rate RM cell turnaround enabled on rate.
Rate is below schedule table min rate. Enable out-of-rate Forward RM generation to restart VCC.
GCRA L parameter exponent for ER rate.
GCRA L parameter mantissa for ER rate.
GCRA I parameter exponent for ER rate.
GCRA I parameter mantissa for ER rate. I and L parameters are copied to VCC structure.
New ER for congestion.
ACR field for transmitted forward RM cell.
New rate index for ACR lose-it behavior triggered. The new rate decision block is located at byte
address SCH_ERB*128 + 32*ACR_INDEX.
ACR Lose-it behavior trigger time.
New rate indexes. The correct new rate index is selected with a 3-bit rate decision vector. The rate
decision block is located at byte address SCH_ERB*128 + 32*NEW_RATEn.
NEW_RATE1
NEW_RATE3
NEW_RATE5
NEW_RATE7
ACR_INDEX
CONG_ER
Mindspeed Technologies
L_MAN
Rsvd
ATM ServiceSAR Plus with xBR Traffic Management
Description
™
I_EXP
NEW_RATE0
NEW_RATE2
NEW_RATE4
NEW_RATE6
ACR_TO
ACR
28236-DSH-001-B
I_MAN
CN8236