RS8234 Mindspeed Technologies, RS8234 Datasheet - Page 202

• Manufacturer Part Number: RS8234
• Description: Atm Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

6.0 Traffic Management
6.5 Traffic Management Control and Status Structures
Table 6-15. Bucket Table Entry
6-42
6.5.3.4 Bucket Table for
Word 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0
Table 6-14. VBR1 and VBR2 SCH_STATE Field Descriptions
BUCKET2
L1_EXP
L1_MAN
I1_EXP
I1_MAN
PRESENT
DELTA2_SIGN
DELTA2_NZ
DELTA1_SIGN
DELTA1_NZ
DELTA2_EXP
DELTA2_MAN
DELTA1_EXP
DELTA1_MAN
NOTE(S):
cells/sec.)
Field Name
VBR2 and VBRC
Rsvd
The GCRA I value is expressed in cell slot intervals. Example
Index into Bucket table to give I2 and L2 for SCHED_MODE = VBR2 & VBRC. Bucket table base is
given by SEG_BCKB register field. Entries in Bucket table have same format as L1_EXP, L1_MAN,
I1_EXP, and I1_MAN.
GCRA L parameter exponent for bucket 1.
L1_EXP must satisfy
L1_EXP that does not satisfy
GCRA L parameter mantissa for bucket 1.
Bucket 1 L value is:
GCRA I parameter exponent for bucket 1.
I1_EXP must satisfy
GCRA I parameter mantissa for bucket 1.
Bucket 1 I value is:
Current Schedule Table position.
When set, indicates delta is negative for bucket 2.
When set, indicates delta is non-zero for bucket 2.
When set, indicates delta is negative for bucket 1.
When set, indicates delta is non-zero for bucket 1.
Delta exponent for bucket 2.
Delta mantissa for bucket 2.
Desired position for bucket 2 is:
Delta exponent for bucket 1.
Delta mantissa for bucket 1.
Desired position for bucket 1 is:
L2_EXP
DELTA1_NZ * 2
DELTA1 and DELTA2 give the offsets to the desired position for each bucket and
need to have the same resolution as I and L.
The Bucket Table has only 256 entries.
entry format and field descriptions for the Bucket Table.
DELTA2_NZ * 2
Mindspeed Technologies
2
10 <= I1_EXP <= 25.
L1_EXP <= min(I1_EXP + 9,29).
(I1_EXP - 10)
2
(DELTA1_EXP - 10)
(DELTA2_EXP - 10)
(L1_EXP - 10)
L2_MAN
L1_EXP >= I1_EXP - 9
(1+I1_MAN/512).
(1+L1_MAN/512).
(1 + DELTA1_MAN/512) + PRESENT.
(1 + DELTA2_MAN/512) + PRESENT.
Description
ATM ServiceSAR Plus with xBR Traffic Management
I
=
Table 6-15
----------- -
PCR
™
I2_EXP
1
will have an effective L1 value of zero.
R
MAX
and
(I is not expressed in
Table 6-16
28234-DSH-001-B
I2_MAN
display the
RS8234