Industrypack (Ip) Interfaces; Ethernet Interface - Motorola MVME162 User Manual

Functional Description
C
aution
4

IndustryPack (IP) Interfaces

The IPIC ASIC on the MVME162 supports four IndustryPack (IP) interfaces;
these are accessible from the front panel. Refer to the IPIC Programming
Model in the MVME162 Embedded Controller Programmer's Reference Guide for
details of the IP interface. Refer to the MVME162 Embedded Controller Support
Information manual for the pin assignments of the IP connectors.

Ethernet Interface

The Intel 82596CA LAN controller is used 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 MVME162 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 MVME162 has a different value for xxxxx).
Each MVME162 has an Ethernet station address displayed on a label attached
to backplane connector P2. In addition, the six bytes including the Ethernet
station address are stored in the BBRAM configuration area. That is,
08003E2xxxxx is stored in the BBRAM. At an address of $FFFC1F2C, the upper
four bytes (08003E2x) can be read. At an address of $FFFC1F30, the lower two
bytes (xxxx) can be read. Refer to the BBRAM/TOD Clock memory map
description in Chapter 3. The MVME162 debugger has the capability to
retrieve or set the Ethernet station address.
4-8
Do not connect serial data devices to the equivalent ports on
the MVME712 series transition module and the MVME162
front panel at the same time. This could result in simul-
taneous transmission of conflicting data.
Do not connect peripheral devices to Port 1, Port 3, or the
Centronics printer port on the MVME712 series transition
module. In the EIA-232-D case, none of these ports are con-
nected to any MVME162 circuits. In the EIA-530 case,
attempting to use these ports would produce certain con-
nections with the potential to damage the MVME162 or the
peripherals.
User's Manual