Table of Contents
Advertisement
Board Level Hardware Description
1
IndustryPack (IP) Interfaces
Optional Ethernet Interface
1-22
Up to two IP modules may be installed on the 700/800-series
MVME162LX as an option. The interface between the IPs and
MVME162LX is the IndustryPack Interface Controller (IP2) ASIC.
Access to the IPs is provided by two 3M connectors located behind
the MVME162LX front panel. Refer to the chapter on the IP2 in the
MVME162LX Embedded Controller Programmer's Reference Guide for
detailed features of the IP interface.
The MVME162LX uses the 82596CA to implement the Ethernet
transceiver interface. The 82596CA accesses local RAM using DMA
operations to perform its normal functions. Because the 82596CA
has small internal buffers and the VMEbus has an undefined
latency period, buffer overrun may occur if the DMA is
programmed to access the VMEbus. Therefore, the 82596CA should
not be programmed to access the VMEbus.
Every MVME162LX that has the Ethernet interface is assigned an
Ethernet Station Address. The address is $08003E2XXXXX where
XXXXX is the unique 5-nibble number assigned to the board (i.e.,
every MVME162LX has a different value for XXXXX).
Each board has an Ethernet Station Address displayed on a label
attached to the VMEbus P2 connector. In addition, the six bytes
including the Ethernet address are stored in the configuration area
of the BBRAM. That is, 08003E2XXXXX is stored in the BBRAM.
The upper four bytes (08003E2X) are read at $FFFC1F2C; the lower
two bytes (XXXX) are read at $FFFC1F30. The debugger firmware
has the capability to retrieve or set the Ethernet address.
If the data in the BBRAM is lost, use the number on the label on
backplane connector P2 to restore it.
The Ethernet transceiver interface is located on the MVME162LX
main board, and the industry standard connector is located on its
front panel.
Advertisement
Table of Contents
