Motorola MVME166IG 用户手册
Functional Description
MVME166IG/D2
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Functional Description
This section contains a functional description of the major blocks on the
MVME166 Single Board Computers.
MVME166 Single Board Computers.
Front Panel Switches and Indicators
There are switches and LEDs on the front panel of the MVME166. The
switches are RESET and ABORT. The RESET switch resets all onboard devices
and drives SYSRESET* if the board is system controller. The RESET switch
may be disabled by software.
When enabled by software, the ABORT switch generates an interrupt at a user-
programmable level. It is normally used to abort program execution and
return to the debugger.
There are ten LEDs on the MVME166 front panel: FAIL, STAT, RUN, SCON,
LAN, RPWR, SCSI, VME, TPWR and VSB.
The red FAIL LED (part of DS1) lights when the BRDFAIL signal line is active.
The MC68040 status lines are decoded, on the MVME166, to drive the yellow
STAT (status) LED (part of DS1). In this case, a halt condition from the
processor lights the LED.
The green RUN LED (part of DS2) lights when the local bus TIP* signal line is
low. This indicates one of the local bus masters is executing a local bus cycle.
The green SCON LED (part of DS2) lights when the VMEchip2 in the
MVME166 is the VMEbus system controller.
The green LAN LED (part of DS3) lights when the LAN chip is local bus
master.
The MVME166 supplies +5V, +12V, and -12V power to the transition board
through fuses. There is one fuse for each voltage. The green RPWR (remote
power) LED (part of DS3) lights when all three voltages are available to the
transition board interface.
The green SCSI LED (part of DS4) lights when the SCSI chip is local bus master.
The green VME LED (part of DS4) lights when the board is using the VMEbus
(VMEbus AS* is asserted by the VMEchip2) or when the board is accessed by
the VMEbus (VMEchip2 is the local bus master).
The MVME166 supplies +5V to the SCSI bus for terminator power through a
fuse. The green TPWR (terminator power) LED (part of DS5) lights when
TERMPWR is available to the SCSI bus. SCSI bus TERMPWR may be supplied
by other devices on the SCSI bus.
The green VSB LED (part of DS5) lights when the MVME166 is using the VSB
(VSB PAS* is asserted by the VSBchip2) or when the MVME166 is accessed by
the VSB (VSBchip2 is the local bus master).
switches are RESET and ABORT. The RESET switch resets all onboard devices
and drives SYSRESET* if the board is system controller. The RESET switch
may be disabled by software.
When enabled by software, the ABORT switch generates an interrupt at a user-
programmable level. It is normally used to abort program execution and
return to the debugger.
There are ten LEDs on the MVME166 front panel: FAIL, STAT, RUN, SCON,
LAN, RPWR, SCSI, VME, TPWR and VSB.
The red FAIL LED (part of DS1) lights when the BRDFAIL signal line is active.
The MC68040 status lines are decoded, on the MVME166, to drive the yellow
STAT (status) LED (part of DS1). In this case, a halt condition from the
processor lights the LED.
The green RUN LED (part of DS2) lights when the local bus TIP* signal line is
low. This indicates one of the local bus masters is executing a local bus cycle.
The green SCON LED (part of DS2) lights when the VMEchip2 in the
MVME166 is the VMEbus system controller.
The green LAN LED (part of DS3) lights when the LAN chip is local bus
master.
The MVME166 supplies +5V, +12V, and -12V power to the transition board
through fuses. There is one fuse for each voltage. The green RPWR (remote
power) LED (part of DS3) lights when all three voltages are available to the
transition board interface.
The green SCSI LED (part of DS4) lights when the SCSI chip is local bus master.
The green VME LED (part of DS4) lights when the board is using the VMEbus
(VMEbus AS* is asserted by the VMEchip2) or when the board is accessed by
the VMEbus (VMEchip2 is the local bus master).
The MVME166 supplies +5V to the SCSI bus for terminator power through a
fuse. The green TPWR (terminator power) LED (part of DS5) lights when
TERMPWR is available to the SCSI bus. SCSI bus TERMPWR may be supplied
by other devices on the SCSI bus.
The green VSB LED (part of DS5) lights when the MVME166 is using the VSB
(VSB PAS* is asserted by the VSBchip2) or when the MVME166 is accessed by
the VSB (VSBchip2 is the local bus master).