miriac MPX-S32G274A User Manual
V2.1
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© MicroSys Electronics GmbH 2020
5.2
Previous Numbering Scheme
The numbering scheme is adopted f rom other MPX modules which used to have
310 edge f ingers only. The reason f or this was that you could previously choose
f rom a broad variety of connectors on the market including 310-pin and 314-pin
types.
310-pin connectors are obsolete now, the numbering scheme has remained
the same.
5.3
Current Numbering Scheme
The dif ferences between 310-pin and 314-pin connectors are f our key
“pins” that
do not carry signals on 310-pin connectors. They are physically not present.
These key pins are, however, available on 314-pin connectors and on the MPX-
S32G274A module carry signals. See Figure 5-1 f or details:
The original connector pinout definition was based on MM70-314-310B1-1-R300 which
is now OBSOLETE.
314-pin connectors have pins between B9/B10 and T9/T10 which are now connected
on the module! They are called “top key” and “bottom key” pins TK1, TK2, BK1, BK2.
Figure 5-1 MXM Connector: pin definition
