
1–6
Preparing for the Installation
10
Console serial port
11
Reset/Halt switch
12
Twisted-pair Ethernet connector
1.4.3 CPU and I/O Assembly Controls and Indicators
The CPU and I/O modules are delivered as a single assembly. The modules are
attached and share a single front panel. Figure 1–3 shows the controls and indica-
tors on that front panel and Table 1–3 describes their functions.
Figure 1–3 Controls and Indicators
1
See your operating system documentation for information on how to recover from reset and halt
operations.
Table 1–3 Controls and Indicators
Callout
Control or Indicator Description
1
Reset/Halt switch
A switch that resets the SBC when pressed in the
Reset (up) direction and halts the operating system
when pressed in the Halt (down) direction. A reset
operation starts SROM execution the same way as
when you power on the system. When you use the
Halt switch, the SBC enters console mode.
Caution: Keep in mind that reset and halt opera-
tions can cause loss of data.
1
2
Status display
A display that shows which test is running during
power-on self-test (POST) diagnostics. When the
POST diagnostics are complete, the display is under
control of the operating system or an application
program.
3
VME Slave Activ-
ity/Watchdog Time-
out LED
An amber LED with two functions. The LED flashes
when the SBC is accessed as a slave by another
device on the VMEbus. The LED lights continu-
ously when the watchdog timer has timed out.
Note: The LED can appear to light continuously
when the module is receiving slave accesses. Since
the LED glows for 1/3 of a second each time it
flashes, three slave accesses per second could make
the LED light continuously.
4
Power LED
A green LED that is lit when the power is on.
1
2
3
4
ML013262