RS8234EBGC Mindspeed Technologies, RS8234EBGC Datasheet - Page 206
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RS8234EBGC
Manufacturer Part Number
RS8234EBGC
Description
RS8234EBGC ATM XBR SAR
Manufacturer
Mindspeed Technologies
Datasheet
1.RS8234EBGC.pdf
(401 pages)
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6.0 Traffic Management
6.5 Traffic Management Control and Status Structures
6-46
Table 6-22. ABR SCH_STATE Field Descriptions (1 of 2)
L_EXP
L_MAN
I_EXP
I_MAN
PRESENT
MCR_LIM_NZ
DELTA_SIGN
DELTA_NZ
MCR_LIM_EXP
MCR_LIM_MAN
DELTA_EXP
DELTA_MAN
CONG_ID
OOR_PRI
TM_EXP
BCK_OOR
FWD_OOR
SCH_OOR
TA_XMIT
TA_PND
CELL_INDEX
Field Name
GCRA L parameter exponent for ER rate.
GCRA L parameter mantissa for ER rate.
GCRA I parameter exponent for ER rate.
GCRA I parameter mantissa for ER rate.
Current schedule table position.
must be set to 1.
MCR Limit exponent.
MCR_LIM_EXP must satisfy
must be set to a decimal value of 31 (i.e., binary all-ones).
MCR Limit mantissa.
MCR_LIMIT is:
This format for calculating MCR_LIMIT is the same as used with the GCRA I parameter to calculate
rates.
VCC priority will be increased by one when rate falls below 1/MCR_LIM.
must be set to a decimal value of 511 (i.e., binary all-ones).
Delta exponent for ER rate.
Delta mantissa for ER rate.
Desired position for ER rate is:
only if the FBQ_CNG[CONG_ID] bit is set in the SCH_CNG register. The normal setting for this field is
the free buffer queue ID for the VCC.
Segmentation priority for out-of-rate RM cells.
RM_TIME value has expired and is no longer valid.
Backward RM cell has been scheduled out-of-rate.
Forward RM cell has been scheduled out-of-rate.
A Backward RM cell has been transmitted after the last Forward RM cell transmitted.
A Backward RM cell is waiting for transmission.
ER cell type decision block index for cell type decisions. The cell type decision block is located at byte
address SCH_ABRB*128 + 8*CELL_INDEX.
MCR Limit is non-zero.
Delta is negative for ER rate.
Delta is non-zero for ER rate.
Congestion Index for changing ER on turnaround RM cells. The ER in the turnaround cell is changed
VCC has halted due to low ACR and has out-of-rate Forward RM cells enabled.
To disable priority bumping, MCR_LIMIT must be set to its maximum value. Thus, MCR_LIM_NZ
To disable priority bumping, MCR_LIMIT must be set to its maximum value. Thus, MCR_LIM_EXP
MCR_LIM_NZ * 2
To disable priority bumping, MCR_LIMIT must be set to its maximum value. Thus, MCR_LIM_MAN
DELTA_NZ * 2
(DELTA_EXP-10)
Mindspeed Technologies
(MCR_LIM_EXP-10)
MCR_LIM_EXP <= 29.
(1+DELTA_MAN/512)+PRESENT
(1+MCR_LIM_MAN/512)
Description
ATM ServiceSAR Plus with xBR Traffic Management
™
28234-DSH-001-B
RS8234
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