CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 153

• 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

Table 5-13. Reassembly VCC Table Descriptions (1 of 3)
CN8236
ATM ServiceSAR Plus with xBR Traffic Management
28236-DSH-001-B
VC_EN
AAL_TYPE
DPRI
PASS_OAM
AALx_EN
FF_DSC
TO_INDEX
PM_INDEX
AAL_EN
TO_LAST
TO_EN
CUR_TOCNT
ER_EFCI
Field Name
Current time-out counter for the channel.
Enables the VCC table entry. If disabled, the cell is discarded.
When VC_EN is a logic high, configure channel to process specific AA as listed below; otherwise,
when VC_EN is a logic low, a value of 11 causes the CELL_DSC_CNT counter not to be incremented.
00 = AAL5
01 = AAL0
10 = AAL3/4
11 = Reserved
Discard Priority value. Compared against global priority in CLP and Frame Relay discard modes to
determine discard eligibility. In LANE-LECID echo suppression mode, this field is the index into the
LECID table that holds channel LECID values.
When bit is set OAM cells are processed and data cells are discarded without incrementing any
discard counters.
When set, enables the AALx function.
FIFO buffer Full Discard. When a logic high, cells are discarded when the incoming DMA FIFO buffer
is almost full. This includes OAM cells when RSM_CTRL1(OAM_QU_EN) is a logic low.
Selects one of eight INIT_TOCNT values in internal SRAM.
Pointer to a PM OAM processing word. Index with reference to top of VPI Index table.
Enable various cell processes. The AAL_EN field contains the following control
bits:
PM_EN
FIFO_EN
LNK_EN
FW_EN
M52_EN
BINTR
STM_MODE = Enable Streaming Mode.
LECID_EN
FRD_EN
CLPD_EN
Indicates the last VCC table entry to process for time-out.
Enable time-out processing on the channel.
ER EFCI bit of the previous data cell.
PM_EN
9
Table 5-13
FIFO_EN
8
= Enable PM OAM processing on this channel.
= Enable Logical FIFO Buffer mode.
= Enable writing of buffer descriptor NEXT field.
= Enable firewall processing. Used in conjunction with FWALL_EN bit in RSM_CTR0.
= If set high, all 52 octets of the cell are written to a cell buffer.
= Enable interrupt after BOM buffer filled in Message Mode.
= Enable LANE-LECID echo suppression. Invalid in AAL3/4.
= Enable frame relay DE (Discard Eligibility) mode. Invalid in AAL3/4.
= Enable CLP discard mode. Invalid in AAL3/4.
Mindspeed Technologies
LNK_EN
details the descriptions of the reassembly VCC table fields.
7
FW_EN
6
Description/Function
M52_EN
5
BINTR
4
™
5.7 Reassembly Control and Data Structures
STM_MODE
3
5.0 Reassembly Coprocessor
LECID_EN
2
FRD_EN
1
CLPD_EN
0
5-43