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Board Level Hardware Description
1
The Z85230 supplies an interrupt vector during interrupt acknowledge
cycles. The vector is modified based upon the interrupt source within the
Z85230. Interrupt request levels are programmed via the MCchip.
The Z85230s are interfaced as DTE (data terminal equipment) with EIA-
232-D signal levels. The four serial ports are routed to four RJ45 telephone
connectors on the MVME162LX front panel.
Refer to the Z85230 data sheet and to the MCchip Programming Model in
the MVME162LX Embedded Controller Programmer’s Reference Guide
for additional information.
IndustryPack (IP) Interfaces
Up to two IndustryPack (IP) modules may be installed on the
MVME162LX Embedded Controller as an option. The interface between
the IPs and the MVME162LX is the IndustryPack Interface Controller
(IPIC) ASIC. Access to the IPs is provided by two 3M connectors located
behind the controller’s front panel.
Refer to the chapter on the IPIC in the MVME162LX Embedded Controller
Programmer’s Reference Guide for additional information on the IP
interface.
Ethernet Interface
The MVME162LX Embedded Controller uses the 82596CA controller 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 (every MVME162LX
has a different value for XXXXX).
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