PXF4333 Datasheet, PDF (48/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Functional Description
In the first case
VPI(11,0) < 2^x – 1
;
with
ìx
í
î
x
=
=
16 – MNUM
0
for MNUM > 0 ü
for
MNUM = 0
ý
þ
the LCI is built by {VPI, VCI, PN} values whereas the VCI range is given by
(MNUM - PNUM) bits and the VPI range is given by (16 - MNUM) bits.
Note: Programming MNUM(3:0) = 0 is interpreted as decimal 16.
The following tables provide the possible LCI building patterns for all allowed PNUM and
MNUM configurations. The resulting LCI is internally treated in the same way as in the
LCI cell header mapping modes, i.e. the two MSBs are checked against the quarter
segment configuration that allows for cascading of up to four ABM-3G devices.
Note: VPI and VCI cell header field positions that are not mapped into the LCI are
checked against ‘0’. A mismatch is treated as ‘invalid LCI’ and the cell is discarded.
Data Sheet
48
2001-12-17