CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 297
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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CN8236
ATM ServiceSAR Plus with xBR Traffic Management
12.4.1 Cell Tagging
28236-DSH-001-B
12.4 UTOPIA Level 2 Interface
The CN8236 supports both UTOPIA Level 1 and Level 2 interfaces. These are
described in general terms below with an emphasis on their differences.
In addition to the standard 53-octet cell formats, given in
the CN8236 supports user programmable cell sizes for Routing Tag applications.
This allows a maximum cell size of 64 bytes. These cell formats are shown in
Tables 12-7
programmed into the TAG_SIZE bits of CONFIG1.
Table 12-5. Cell Format 8 Bit Mode
Bit 7
• UTOPIA Level 1: This is an 8- or 16-bit interface designed for data rates
• UTOPIA Level 2: This interface defines the Multi-port support features
Both Level 1 and Level 2 support odd parity over the width of the data bus.
up to 200 Mbps at a clock rate of 25 MHz. Both Octet-level and Cell Level
handshaking are supported.
that allow up to 31 UTOPIA devices to multiplex on one UTOPIA bus.
The SAR only supports up to eight PHY devices. It allows either 8 or 16
bit data buses and uses only cell level handshaking. It can transfer up to
800 Mbps when running at 50 MHz in the 16 bit mode.
Mindspeed Technologies
and 12-8. The number of octets added for the tagging function is
UDF1 (HEC) (byte 5)
Payload 48
Payload 1
Header 1
Header 2
Header 3
Header 4
...
:
0
™
12.0 ATM UTOPIA Interface
12.4 UTOPIA Level 2 Interface
Tables 12-5
and 12-6,
12-7
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