Functional Description
1-17
1
No-VMEbus-Interface Option
The 700/800-series MVME162LX may be operated as an embedded
controller without the VMEbus interface. For this option, the
VMEchip2 ASIC and the VMEbus buffers are not populated. Also,
the bus grant daisy chain and the interrupt acknowledge daisy
chain have zero-ohm bypass resistors installed.
To support this feature, certain logic in the VMEchip2 has been
duplicated in the MC2chip. This logic is inhibited in the MC2chip
when the VMEchip2 is present. The enables for these functions are
controlled by software and MC2chip hardware initialization.
Note that MVME162LX models ordered without the VMEbus
interface are shipped with Flash memory blank (the factory uses the
VMEbus to program the Flash memory with debugger code). To
use the 162Bug package, MVME162Bug, be sure that jumper header
J21 is configured for the EPROM memory map. Refer to Chapters 2
and 3 for further details.
Contact your local Motorola sales office for ordering information.
Memory Options
The following memory options are used on the different versions of
700/800-series MVME162LX boards.
DRAM Options
The MVME162LX offers the following DRAM options:
❏4, 8, or 16MB shared DRAM with programmable parity on a
mezzanine module
❏4, 8, 16, or 32MB ECC DRAM on a mezzanine module
The DRAM architecture for non-ECC memory is non-interleaved
for 4 or 8MB and interleaved for 16MB. Parity protection is enabled
with interrupts or bus exception when a parity error is detected.