PM3350-SW View Datasheet(PDF) - PMC-Sierra
Part Name
Description
MFG CO.
'PM3350-SW' PDF : 224 Pages View PDF
ELAN 8X10
DATA SHEET
PMC-970109
ISSUE 3
PM3350 ELAN 8 X10
8 PORT ETHERNET SWITCH
In a multiple-ELAN 8x10 system, a single ELAN 8x10 may be designated as a master
and possess a boot image in an EPROM or EEPROM. This ELAN 8x10 is then
responsible for initializing and configuring all the other ELAN 8x10s in the system via
the expansion port interface. This is facilitated by the RISCRUN configuration bit
supplied on the memory data buses of all of the ELAN 8x10s in the system. In this
application, the master ELAN 8x10 should have its RISCRUN bit pulled HIGH during
reset, and all of the other slaves should have the corresponding bits pulled LOW,
ensuring that they enter standby mode The master ELAN 8x10 can then configure
itself, download boot information to the RAM interfaced to the remaining ELAN 8x10s,
and finally enable all of the slave ELAN 8x10s to start running. The slave devices can
then initialize themselves using the downloaded information.
Configuration Parameters
This section describes the various configuration parameters that can be adjusted by the
system implementer to create a boot image for various system types and options. The
configuration parameters are primarily located in a header file that is read as part of the
bootstrap image creation process.
This section is TBD.
Stand-Alone System Boot
This section describes how a stand-alone ELAN 8x10 system (i.e., one containing only
one device, or one where every ELAN 8x10 device possesses its own EPROM/
EEPROM that provides a boot image) initializes itself.
This section is TBD.
Master/Slave System Boot
The boot-up process implemented in a master/slave ELAN 8x10 system, consisting of a
single master ELAN 8x10 device and one or more slave devices, is described here. In
such a system, only the master device possesses an EPROM or EEPROM containing
the primary boot image; the slaves receive their boot images in the form of downloads
by the master device to predetermined areas of slave device external RAM.
This section is TBD
Host-Controlled System Boot
In a host-controlled system, it is expected that all of the ELAN 8x10 devices are
configured as slaves, i.e., they do not possess EPROMs or EEPROMs containing boot
images that permit them to self-configure at power-up. Instead, they enter a halt state
after system reset and wait for the host (i.e., system master processor) to download the
required boot image and enable them to begin executing it.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY
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