Motorola MVME2700 Series Servisní příručka stáhnout pdf (Strana 118)

3-20 Computer Group Literature Center Web Site

Functional Description

Front Panel Indicators (DS1 – DS6)

There are six LEDs on the MVME2700 front panel. The LEDs monitor the

status of the board as described below.

Notes

1. At reset, a lamp test function illuminates all the LEDs.

2. Because the

FUS LED monitors the status of several voltages on the

MVME2700, it does not directly indicate the condition of any single

fuse. If the LED flickers or goes out, check all the fuses

(polyswitches).

Table 3-3. MVME2700 LEDs

LED Function

CHS

(DS1,

yellow)

Checkstop; driven by the MPC750 status lines on the

MVME2700. Lights when a halt condition from the processor

is detected. Should extinguish when the board is reset.

BFL

(DS2,

amber)

Board failure; lights when the BRDFAIL

∗

signal line is active,

indicating a fault is present on the MVME2700.

CPU

(DS3, green)

CPU activity; lights when the DBB

∗

(Data Bus Busy) signal

line on the MPC750 processor bus is active.

PCI

(DS4, green)

PCI activity; lights when the IRDY

∗

(Initiator Ready) signal

line on the PCI bus is active. Indicates that the PCI mezzanine

(if installed) is active

FUS

(DS5, green

Fuse OK; lights when +5V DC, +12V DC, and –12V DC power

is available from the base board to the transition module and

remote devices.

SYS

(DS6, green)

System Controller; lights when the Universe II ASIC in the

MVME2700 is functioning as VMEbus system controller.

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 214 215

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