PXF4333 Datasheet, PDF (57/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Functional Description
the UTOPIA transmit interface. However, bandwidth overbooking of the interface is also
possible, resulting in backpressure towards the respective ABM-3G core.
SSRAM interface
UTOPIA
upstream
receive
MASTER
SDRAM interface
ABM-3G Core
upstream
Common
LCI Table
UTOPIA
upstream
transmit
SLAVE
UTOPIA
downstr.
transmit
MASTER
µP interface
ABM-3G Core
downstream
SDRAM interface
UTOPIA
downstr.
receive
SLAVE
JTAG interface
Figure 3-11 ABM-3G in Uni-directional Mode Using both Cores
If the resources of one core are sufficient, the downstream core can be deactivated (see
Figure 3-12). This reduces power consumption and allows omission of the external
downstream SDRAM. It also permits the SSRAM to be smaller (see below).
SSRAM interface
UTOPIA
upstream
receive
MASTER
UTOPIA
downstr.
transmit
MASTER
µP interface
SDRAM interface
ABM-3G Core
upstream
Common
LCI Table
ABM-3G Core
downstream
SDRAM interface
UTOPIA
upstream
transmit
SLAVE
UTOPIA
downstr.
receive
SLAVE
JTAG interface
Figure 3-12 ABM-3G in Uni-directional Mode Using one Core
Data Sheet
57
2001-12-17