Motorola MVME187 User Manual
Installing the Hardware
3-25
3
Powering Up the System
The following table shows what takes place when you turn
equipment power ON (depending on whether 187Bug is in Board
Mode or in System Mode):
equipment power ON (depending on whether 187Bug is in Board
Mode or in System Mode):
Initializing the Real-Time Clock
The onboard real-time clock (RTC) is backed up with a self-
contained battery. Before shipment of this board, the clock of the
RTC device was stopped to preserve battery life.
contained battery. Before shipment of this board, the clock of the
RTC device was stopped to preserve battery life.
The boardÕs ÒSelftestsÓ (ST) and operating systems require the clock
of the RTC to be operating.
of the RTC to be operating.
shows the steps required to
initialize the RTC, depending on the mode.
Examining and/or Changing Environmental Parameters
Use the 187BugÕs ENV command to verify the NVRAM (BBRAM)
parameters, and optionally use ENV to make changes to the
Environmental parameters. Refer to Appendix A for the
Environment parameters.
parameters, and optionally use ENV to make changes to the
Environmental parameters. Refer to Appendix A for the
Environment parameters.
If 187Bug is in...
Board Mode
187Bug executes some self-checks and displays the debugger prompt
187-Bug>
System Mode
The system performs a
selftest and tries to
autoboot.
selftest and tries to
autoboot.
If the conÞdence test fails, the test aborts
when the Þrst fault occurs. If possible, an
appropriate message is displayed, and
control then returns to the menu (refer to
Chapter 4,
when the Þrst fault occurs. If possible, an
appropriate message is displayed, and
control then returns to the menu (refer to
Chapter 4,
for ENV and MENU
commands).