pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 51

• Manufacturer Part Number: pxf4336
• Description: Abm Premium Atm Buf Fer Manager
• Manufacturer: Infineon Technologies Corporation

Internal Address Reduction
Two parameters in
function of the internal LCI value:
• PNUM(2:0)
• MNUM(3:0)
Two translation functions are effective, depending on the cell header VPI(11:0) value
compared to the configured parameter MNUM.
In the first case
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-P devices.
Note: VPI and VCI cell header field positions that are not mapped into the LCI are
Data Sheet
header fields VPI, VCI and the Port Number (PN). The port number is taken either
from the UTOPIA port number or the UDF1 cell header byte.
Determines the number of bits taken from the port number field.
Determines the VCI and VPI ranges depending on the cell header VPI value.
VPI 11 0
checked against ‘0’. A mismatch is treated as ‘invalid LCI’ and the cell is discarded.
(
, )
<
2
x
–
Register 127 "MODE2" on Page 377
1
;
with
ì
í
î
x
x
=
=
16 MNUM
0
–
51
for
for
MNUM
MNUM
Functional Description
determine the building
>
PXF 4336 V1.1
=
0
0
ü
ý
þ
2001-12-17
ABM-P