PXB4330 Datasheet, PDF (23/201 Pages) Infineon Technologies AG – ICs for Communications

PXB 4330
Overview
Alternatively, the single-board solution could be used as a multiplexer connecting many
subscriber lines to one access line.
If full OAM functionality is not needed, the PXB 4340 E AOP chip could be omitted.
Minimum OAM and multicast functionality are also built into the PXB 4350 E ALP. The
Address Reduction Circuit (ARC) could be omitted if the built-in address reduction is
sufficient.
Conn.
RAM
UTOPIA
Pol.
RAM
ARC
UTOPIA
Conn.
RAM
UTOPIA
Pointer
RAM
Cell
RAM
PHYs
PXB 4350 E
ALP
PXB 4340 E
AOP
Rx
Master
Tx
Slave
PXB 4330 E
ABM
Tx
Master
Rx
Slave
Conn. RAM = connection data RAM
Pol. RAM = policing data RAM
ARC = address reduction circuit
Cell RAM = ATM cell storage RAM
Conn.
RAM
Conn.
RAM
Cell
RAM
Figure 1-5 Mini Switch with 622 Mbit/s Throughput
In addition to the two applications illustrated in Figure 1-4 and Figure 1-5, many other
combinations of the chip set are possible in the design of ATM switches. Various
combinations of functionality are possible because of the modular design of the chip set.
Address reduction, multicast, policing, redundant switching network, and other functions
can be implemented by appropriate chip combinations. The number of supported
connections scales with the amount of external connection RAM. Policing data RAM can
be omitted if the function is not required. Thus, the functionality and size of an ATM
switch can be tailored exactly to the requirements of the specific application, without
carrying the overhead burden of unnecessary functions.
Data Sheet
1-23
09.99