CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 366
CN8236EBGB
Manufacturer Part Number
CN8236EBGB
Description
ATM SAR 155Mbps 3.3V ABR/CBR/GFR/UBR/VBR 388-Pin BGA
Manufacturer
Mindspeed Technologies
Datasheet
1.CN8236EBGB.pdf
(443 pages)
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
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15.0 SAR Initialization—Example Tables
15.2 Scheduler Initialization
15.2.2 Scheduler Internal Memory Control Structures
15.2.3 Scheduler SAR Shared Memory Control Structures
15-6
Table 15-5. Table of Values for Sch SAR Shared Memory Initialization (1 of 2)
Schedule Table (CBR slot)
Schedule Table (Tunnel
slot)
Schedule Table (DEFAULT)
SEG VCC Table Entry for
VBR (Words 7 – 8)
Bucket Table Entry
SEG VCC Table Entry for
GFR (Words 7 – 9)
(NOTE: Set PRI_GFR lower
than PRI in word 6).
Table
CBR
CBR_VCC_INDEX
Reserved
CBR
PRI
Reserved
Reserved
BUCKET2
L1_EXP
L1_MAN
I1_EXP
I1_MAN
Reserved
L2_EXP
L2_MAN
I2_EXP
I2_MAN
Reserved
MCRLIM_IDX
L1_EXP
L1_MAN
I1_EXP
I1_MAN
Reserved
No internal memory scheduler structures need to be initialized.
Before segmentation is enabled, the host must allocate and initialize all of the
scheduler SAR-shared memory control structures.
values for each field.
Field
Mindspeed Technologies
Initialized
Value
0x100
0x120
0xB
0xB
0x0
0xA
0xB
0x0
0x0
0x0
0xF
0x3
0xF
0xF
0x4
0x0
0x0
0x0
0x3
0xF
0x0
0xF
1
0
ATM ServiceSAR Plus with xBR Traffic Management
Slot will schedule a CBR channel.
Schedule seg_vcc_index = 0 channel as CBR.
Set all reserved bits to 1.
Slot will schedule a tunnel.
Tunnel Priority Queue = 3.
Set all reserved bits to 1.
Set all reserved bits to 1.
Offset of four into Bucket table for VBR2
parameters.
—
GCRA L = 2.
—
GCRA I = 3.
Must be initialized to 0.
—
GCRA L = 1.
—
GCRA I = 2.
Must be initialized to 0.
Offset of 3 into GFR MCR_Limit table.
—
GCRA L = 32.
—
GCRA I = 50. (Provides MCR ~ 3 Mbps.)
Must be initialized to 0.
™
Table 15-5
Notes
lists the initialized
28236-DSH-001-B
CN8236
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