CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 310

• 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

14.0 CN8237 Registers
14.5 Reassembly Registers
14-20
27–24
23–18
11–5
4–0
Bit
28
17
16
15
14
13
12
Field
Size
1
4
6
1
1
1
1
1
1
7
5
VPI_MASK
Reserved
Reserved
RSM_PHALT
PREPEND_INDEX
FWALL_EN
RSM_FBQ_DIS
RSM_STAT_DIS
GTO_EN
MAX_LEN
GDIS_PRI
Name
Mindspeed Technologies
VPI Mask enable. Used to select UNI/NNI header operation in the direct
index method. When a logic high, the four MSBs of the header are masked
for UNI operation. This also controls the Index table size. A UNI table is 256
entries and a NNI table is 4,096.
Program and read as 0.
Program and read as 0.
Reassembly coprocessor halt on parity error detect. The reassembly
coprocessor will halt the incoming channel logic if a parity error is detected
and the RSM_PHALT bit is set.
Prepend VCC Index. When logic high, the VCC_INDEX is prepended to the
BOM cell transfer.
Firewall enable. Enables free buffer queue firewalling of user cells. If set, this
bit enables the per connection free buffer queue firewall. Each connection
that firewall is active in must have the FW_EN bit set to a logic high in the
VCC table.
Free Buffer Queue Underflow Protection Disable. When a logic high, the
reassembly coprocessor ignores the VLD bit in the free buffer queue when a
new buffer is required. The periodic writing of the read index pointer to
host/SAR-shared memory is also disabled.
Status Queue Overflow Protection Disable. When a logic high, the
reassembly coprocessor ignores the READ_UD pointer.
Global Time-out Enable. When a logic high, the automatic reassembly
time-out function is enabled.
Maximum Length. MAX_LEN × 1,024 is the maximum allowable size in
bytes of an AAL5 CPCS-PDU, including overhead.
Global Discard Priority. Used by the Frame Relay and CLP discard functions.
If the individual channel priority number is less than or equal to GDIS_PRI,
PDUs on that channel can be discarded.
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
™
Description
28237-DSH-001-C
CN8237