pxf4336 Infineon Technologies Corporation, pxf4336 Datasheet - Page 173
pxf4336
Manufacturer Part Number
pxf4336
Description
Abm Premium Atm Buf Fer Manager
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PXF4336.pdf
(425 pages)
- Current page: 173 of 425
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5.4
5.4.1
The ABM-P device uses synchronous dynamic RAM (SDRAM) for the storage of ATM
cells and synchronous static RAM (SSRAM) for the storage of cell pointers. Two SDRAM
Interfaces and one SSRAM Interface are provided. Each of the two SDRAM Interfaces
is associated with one of the ABM Cores. The SSRAM Interface is shared by both
ABM-P Cores. All RAM Interfaces are operated with the system clock provided by the
ABM-P:
Table 5-9
Cell Pointer
SSRAM
e.g.
512 k x 32 bit
e.g.
256 k x 32 bit
e.g.
128 k x 32 bit
e.g.
256 k x 32 bit
e.g.
128 k x 32 bit
e.g.
64 k x 32 bit
Note: The upstream cell storage RAM must always be connected.
Data Sheet
External RAM Interfaces
RAM Configurations
External RAM Sizes
Min.
Required
Up-
stream Cell
SDRAM
128 Mb
e.g.
2*(4Mb*16)
64 Mb
e.g.
1*(2Mb*32)
32 Mb
128 Mb
e.g.
2*(4Mb*16)
64 Mb
e.g.
1*(2Mb*32)
32 Mb
Min.
Required
Down-
stream Cell
SDRAM
128 Mb
e.g.
2*(4Mb*16)
64 Mb
e.g.
1*(2Mb*32)
32 Mb
none
none
none
173
UBMTH Up-
3FFFF
1FFFF
0FFFF
3FFFF
1FFFF
0FFFF
H
H
H
H
H
H
stream
Buffer
256K
cells
128K
cells
64K cells
256K
cells
128K
cells
64K cells
Interface Description
DBMTH Down-
3FFFF
1FFFF
0FFFF
0000
0000
0000
PXF 4336 V1.1
H
H
H
H
H
H
stream
Buffer
256K cells
128Kk
cells
64K cells
0
0
0
2001-12-17
ABM-P
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