4-14
Computer Group Literature Center Web Site
Functional Description
4
SIMM05 — DTE with EIA-232-D interface
SIMM06 — DCE with EIA-232-D interface
SIMM07 — DTE with EIA-530 interface
SIMM08 — DCE with EIA-530 interface
SIMM09 — EIA-485 interface, or DCE or DTE with EIA-422 interface
Port B is routed, via the SIM, to:
1. The DB25 connector marked
SERIAL PORT 2
on the front panel of
the MVME172P4.
SERIAL PORT 2
will be an EIA-232-D DCE or
DTE port, or an EIA-530 DCE or DTE port, or an EIA-485 port, or
an EIA-422 DCE or DTE port, depending upon which SIM is
installed.
Note
Port B is factory-configured for asynchronous communication.
For synchronous communication, this port can be connected to
the TX and RX clocks which may be present on the DB25
connector. These connections are made via jumper header J17 on
the MVME172P4 board. (The TxC and RxC clock lines are
available at the MVME712M
SERIAL PORT 4
port via header J15,
but are not available on other MVME712x transition modules.)
2. The DB25 connector marked
SERIAL PORT 4
on the front panel of
the MVME712M transition module (if used).
SERIAL PORT 4
can be
configured as an EIA-232-D DTE or DCE port, via jumper headers
J18 and J19 on the MVME712M.
Figure 1-3
(sheets 3 through 6) in Chapter 1 illustrates the four
configurations available for Port B when the MVME172P4 is used with an
MVME712M. Note that the port configurations shown in
Figure 1-3
sheets
5 and 6 are not recommended for synchronous applications because of the
incorrect clock direction.
Figure 1-4
(sheets 1 and 2) shows an
MVME172P4 with the two configurations available with EIA-530 SIMs.
Figure 1-5
shows an MVME172P4 with the configuration available with
the EIA-485 /EIA-422 SIM.
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