RS8234EBGC Mindspeed Technologies, RS8234EBGC Datasheet - Page 146

• Manufacturer Part Number: RS8234EBGC
• Description: RS8234EBGC ATM XBR SAR
• Manufacturer: Mindspeed Technologies

5.0 Reassembly Coprocessor
5.7 Reassembly Control and Status Structures
Table 5-15. Reassembly VCC Table Descriptions (1 of 3)
5-42
VC_EN
AAL_TYPE
DPRI
FF_DSC
TO_INDEX
PM_INDEX
AAL_EN
Field Name
Enables the VCC Table entry. If disabled, the cell is discarded.
When VC_EN is a logic high, configure channel to process specific AA; otherwise, when VC_EN is a
logic low, a value of “11” will cause 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.
FIFO Full Discard. When a logic high, cells will be discarded when incoming DMA FIFO 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—Enable PM OAM processing on this channel.
FIFO_EN—Enable Logical FIFO mode.
LNK_EN—Enable writing of buffer descriptor NEXT field.
FW_EN—Enable firewall processing. Used in conjunction with FWALL_EN bit in RSM_CTR0.
M52_EN—f set high, all 52 octets of the cell are written to a cell buffer.
BINTR—Enable interrupt after BOM buffer filled in Message Mode.
STM_MODE—Enable Streaming Mode.
LECID_EN—Enable LANE-LECID echo suppression. Invalid in AAL3/4.
FRD_EN—Enable frame relay DE (Discard Eligibility) mode. Invalid in AAL3/4.
CLPD_EN—Enable CLP discard mode. Invalid in AAL3/4.
PM_EN
9
Table 5-15
FIFO_EN
8
Mindspeed Technologies
LNK_EN
details the descriptions of the reassembly VCC Table fields.
7
FW_EN
6
Description/Function
M52_EN
ATM ServiceSAR Plus with xBR Traffic Management
5
BINTR
4
™
STM_MODE
3
LECID_EN
2
28234-DSH-001-B
FRD_EN
1
CLPD_EN
RS8234
0