Kontron VMOD-2D Manual do Utilizador descarregar pdf (Página 34)

VMOD-2/VMOD-2D

12/15/97

Functional Description

Page 2 - 8Man. ID 03139, Rev. Index 0200

The External Reset is limited to the VMOD-2 and it's piggybacks, and will not reset the VME-

bus unless your application software demands it to. I.e. via the polling of an output register to

detect a "reset" state.

Special note!

There can be occasions when spurious interrupts are caused with the use

of the "local" reset facility.

This can happen when a VMOD-2 IRQ is cleared by the local reset before

the VMEbus system has had a chance to clear the interrupt itself.

The two-pins (25 and 26) of the 50-way front panel connector, can be used to detect the fol-

lowing external events;

Figure 2-1: External Reset Connection — Example 1

Detect breaking of any intermediate con-

nectors b etwee n VMOD-2 an d exte rnal

device .

In this kind of mode their two wires are

joined t o Vcc and Gn d at th e furth est end.

VM OD

Vcc

0V or

Gnd

Breaking either of these connectors

causes a local reset to the VMOD-2

Machine

Upper

pi g g yba c k

Lower

pi g g yba c k

1).

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Kontron VMOD-2D Manual do Utilizador Página 34