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Similarly, the VMEchip2 provides an input signal and a control bit to initiate
a local reset operation. By setting a control bit, software can maintain a board
in a reset state, disabling a faulty board from participating in normal system
operation. The local reset driver is enabled even when the VMEchip2 is not
the system controller. A local reset may be generated by the RESET switch,
a power-up reset, a watchdog timeout, a VMEbus SYSRESET*, or by a
control bit in the global control/status register (GCSR).
Front Panel Indicators
There are four LEDs on the MVME162LX front panel:
and
FUSES
Data Bus Structure
The local bus on the MVME162LX Embedded Controller is a 32-bit
synchronous bus that is based on the MC68040 bus, and supports burst
transfers and snooping. The various local bus master and slave devices use
the local bus to communicate. The local bus is arbitrated by priority type
arbiter and the priority of the local bus masters from highest to lowest is:
82596CA LAN, 53C710 SCSI, VMEbus, and MPU. In the general case,
any master can access any slave; however, not all combinations pass the
common sense test. Refer to the MVME162LX Embedded Controller
Programmer's Reference Guide to determine its port size, data bus
connection, and any restrictions that apply when accessing the device.
http://www.mcg.mot.com/literature
.
LED (red). Lights when the BRDFAIL* signal line is active or
FAIL
when the processor is halted. Part of DS1.
LED (green or amber). Lights when the local bus TIP* signal
RUN
line is low. This indicates one of the local bus masters is executing
a local bus cycle. Part of DS1.
LED (green). Lights when the VMEchip2 in the
SCON
MVME162LX is the VMEbus system controller. Part of DS2.
LED (green). Lights when +5 Vdc, +12 Vdc, and -12 Vdc
FUSES
power is available to the LAN, IP, and SCSI interfaces. Part of DS2.
Functional Description
,
,
,
FAIL
RUN
SCON
1-13
1
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