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Board Level Hardware Description
1
Functional Description
Switches and LEDs
ABORT Switch
RESET Switch
1-12
This section contains a functional description of the MVME162LX
Embedded Controller.
The controller's front panel has an
light-emitting diode (LED) indicators (
When enabled by software, the
user-programmable level. It is normally used to abort program execution
and return to the 162Bug debugger firmware located in the controller's
EPROMs and flash memory.
The
switch interrupter in the MCchip ASIC is an edge-sensitive
ABORT
interrupter connected to the
remove switch bounce.
Note:
For an MVME162LX without the VMEbus option (no
VMEchip2), the LCSR control bit is not available to reset the
module. In this case, the watchdog timer is allowed to time out
to reset the controller.
The
switch resets all onboard devices; it also drives SYSRESET*
RESET
if the MVME162LX is operating as system controller. The
may be disabled by software.
The VMEchip2 includes both a global and a local reset driver. When the
VMEchip2 operates as the VMEbus system controller, the reset driver
provides a global system reset by asserting the VMEbus signal
SYSRESET*. A SYSRESET* may be generated by the
power-up reset, a watchdog timeout, or by a control bit in the LCSR (local
control/status register) in the VMEchip2. SYSRESET* remains asserted
for at least 200 msec, as required by the VMEbus specification.
and
ABORT
RESET
,
,
FAIL
RUN
SCON
switch generates an interrupt at a
ABORT
switch. This interrupter is filtered to
ABORT
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switch and four
,
).
FUSES
switch
RESET
switch, a
RESET
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