CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 307

• Manufacturer Part Number: CN8237EBGB
• Description: ATM SAR 622Mbps 3.3V ABR/CBR/GFR/UBR/VBR 456-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of CN8237EBGB

• Package: 456BGA
• Traffic Class: ABR|CBR|GFR|UBR|VBR
• Utopia Type: Level 1|Level 2
• Host Interface: PCI
• Maximum Data Rate: 622 Mbps
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3.135 V

CN8237
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
0x160
0x168
28237-DSH-001-C
31–24
23–16
31–16
15–0
15-0
Bit
Bit
—
—
Maximum ABR VCC_INDEX Register (SCH_ABR_MAX)
Schedule ABR Constant Register (SCH_ABR_CON)
Field
Field
Size
Size
16
16
16
8
8
Reserved
MAX_BEHIND
VCC_MAX
ABR_TRM
ABR_ADTF
The SCH_ABR_MAX register defines the configured maximum ABR VCC
index, and specifies the MAX_BEHIND value. The MAX_BEHIND value
specifies the number of slots in the schedule table, the schedule table entry
pointer can fall behind. MAX_BEHIND should be set to
except special multi-PHY DSL applications.
The SCH_ABR_CON register sets the ABR TRM and ADTF timeout. Timeout
values are in units of 64 cell slots.
Name
Name
Mindspeed Technologies
Program and read as 0.
Number of slots Scheduler can fall behind. For normal operations, this
value should be 0. (A value of 0 results in the default value of 255 internally
used). For multi-PHY DSL operations, this value should be set to the
number of port used *2, for example, if 8 ports are used, this
MAX_BEHIND should be set to 16.
Maximum ABR VCC index.
ABR TRM parameter.
Parameter value is SYSCLK period × SLOT_PER × ABR_TRM × 64.
ABR ADTF parameter.
Parameter values is SYSCLK period × SLOT_PER × ABR_ADTF × 64.
™
Description
Description
0
for all applications,
14.0 CN8237 Registers
14.4 Scheduler Registers
14-17