Functional Description
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4-15
4
!
Caution
Do not connect serial data devices to the equivalent ports on
the MVME712M transition module and the MVME172P4
front panel at the same time. This could result in simultaneous
transmission of conflicting data.
!
Caution
Do not connect peripheral devices to Port 1, Port 3, or the Centronics
printer port on the MVME712M transition module. In the EIA-232-D case,
none of these ports are connected to any MVME172P4 circuits. In the
EIA-530 case, attempting to use these ports would produce certain
connections with the potential to damage the MVME172P4 or the
peripherals.
!
Caution
When using an EIA-530 SIM or an EIA-485/EIA-422 SIM, do not connect
the MVME172P4 to an MVME712x transition board. Neither the P2
adapter nor the transition boards support the EIA-530, EIA-485, or EIA-
422 signals.
IndustryPack (IP) Interfaces
The IP2 function in the Petra ASIC on the MVME172P4 supports four
IndustryPack (IP) interfaces: these are accessible from the front panel. The
IP2 function also includes four DMA channels (one for each IP, or two for
each double-wide IP), 32 or 30MHz (32MHz for MC68LC0x0 or 30MHz
for MC680x0) or 8MHz IndustryPack clock selection (jumper selectable),
and one programmable timebase strobe which is connected to the four
interfaces. Refer to the IP2 programming model in the MVME1X2P4 VME
Embedded Controller Programmer’s Reference Guide for details of the IP
interface. Refer to Chapter 5 for the pin assignments of the IP connectors.
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