CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 217

• 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

CN8236
ATM ServiceSAR Plus with xBR Traffic Management
6.5.4 GFR-Specific Structures
28236-DSH-001-B
Table 6-16. SCH_STATE for SCH_MODE = GFR
Table 6-17. SCH_STATE Field Descriptions for SCH_MODE = GFR
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
MCRLIM_IDX
L1_EXP
L1_MAN
I1_EXP
I1_MAN
6.5.4.1 GFR Schedule
7
8
9
Field Name
MCRLIM_IDX
MCRLIM_IDX
Reserved
(MSB)
(LSB)
State Table
Index into table of 256 MCR LIMIT values each specifying an increase in the VCC’s priority by 1 if the
VCC’s rate falls below MCR. The table base is located on top of the BUCKET2 table whose base is given
by SEG_BCKB register field. The BUCKET2 table is 1 kB in length. Table values are in the form of a non-0
bit, exponent, and mantissa such that MCR_LIMIT is
GCRA L parameter exponent for MCR bucket.
L1_EXP must satisfy
LI_EXP that does not satisfy
GCRA L parameter mantissa for MCR bucket
Bucket 1 L value is 2
GCRA I parameter exponent for MCR bucket.
I1_EXP must satisfy 10
GCRA I parameter mantissa for MCR bucket.
Bucket 1 I value is 2
L1_EXP
MCR_LIM_NZ × 2
Table 6-16
(I1_EXP – 10)
Mindspeed Technologies
(L1_EXP – 10)
Reserved
L1_EXP min I1_EXP
and
(MCR_LIM_EXP–10)
I2_EXP
Table 6-17
L1_EXP I1_EXP 9
L1_MAN
(1 + I1_MAN / 512)
(1 + L1_MAN / 512)
25
detail the SCH_STATE structure for GFR traffic.
(1 + MCR_LIM_MAN / 512)
Description
+
Reserved
–
9 or 29
6.5 Traffic Management Control and Status Structures
will have effective L1 value of 0.
.
Reserved
™
I1_EXP
6.0 Traffic Management
Reserved
I1_MAN
6-49