LT8978b,V1工控備件,ABB英文說明
中止開關(guān)（S1）中止開關(guān)位于LED夾層上。當(dāng)由激活時(shí)軟件中，中止開關(guān)可以從基座生成中斷信號(hào)板到處理器。中斷通常用于中止程序執(zhí)行并將控制返回到位于MVME2603/2604 EPROM和閃存。中斷信號(hào)通過ISA總線中斷線IRQ8到達(dá)處理器模塊?. 信號(hào)也可在Z8536 CIO設(shè)備的引腳PB7處使用，該設(shè)備處理各種狀態(tài)信號(hào)、串行輸入/輸出線和計(jì)數(shù)器。
LT8978b,V1工控備件連接到中止開關(guān)的斷路器是一個(gè)邊緣敏感電路，過濾以消除開關(guān)反彈。
復(fù)位開關(guān)（S2）復(fù)位開關(guān)位于LED夾層上。復(fù)位開關(guān)重置所有車載設(shè)備；它還驅(qū)動(dòng)系統(tǒng)重置? 如果MVME2603/2604是系統(tǒng)控制器。前面板指示燈（DS1–DS6）MVME2603/2604前面板上有六個(gè)LED：CHS、BFL、CPU、，PCI、FUS和SYS。
? CHS（DS1，黃色）。檢查停止；由MPC603/604狀態(tài)驅(qū)動(dòng)MVME2603/2604上的線路。當(dāng)停止條件從檢測(cè)到處理器。
? BFL（DS2，黃色）。電路板故障；BRD故障時(shí)亮起? 信號(hào)線路處于活動(dòng)狀態(tài)。
? CPU（DS3，綠色）。CPU活動(dòng)；DBB時(shí)亮起? （數(shù)據(jù)總線忙）處理器總線上的信號(hào)線處于活動(dòng)狀態(tài)。
? PCI（DS4，綠色）。PCI活動(dòng)；當(dāng)IRDY? （發(fā)起人就緒）PCI總線上的信號(hào)線處于活動(dòng)狀態(tài)。這表明PCI夾層或承載板（如果已安裝）處于活動(dòng)狀態(tài)。
? FUS（DS5，綠色）。保險(xiǎn)絲正常；+5V DC、+12V DC和–從基板到過渡電路提供12V直流電源模塊和遠(yuǎn)程設(shè)備。注意，因?yàn)镕US LED監(jiān)控多個(gè)電壓的狀態(tài)在MVME2603/2604中，它不直接指示狀況任何單個(gè)保險(xiǎn)絲。如果LED閃爍或熄滅，請(qǐng)檢查所有保險(xiǎn)絲（多開關(guān)）。
? SYS（DS6，綠色）。系統(tǒng)控制器；當(dāng)宇宙發(fā)光時(shí)MVME2603/2604中的ASIC是VMEbus系統(tǒng)控制器。
ABORT Switch (S1)
The ABORT switch is located on the LED mezzanine. When activated by
software, the ABORT switch can generate an interrupt signal from the base
board to the processor. The interrupt is normally used to abort program
execution and return control to the debugger firmware located in the
MVME2603/2604 EPROM and Flash memory. The interrupt signal
reaches the processor module via ISA bus interrupt line IRQ8?. The signal
is also available at pin PB7 of the Z8536 CIO device, which handles
various status signals, serial I/O lines, and counters.
The interrupter connected to the ABORT switch is an edge-sensitive circuit,
filtered to remove switch bounce.
RESET Switch (S2)
The RESET switch is located on the LED mezzanine. The RESET switch
resets all onboard devices; it also drives a SYSRESET? signal if the
MVME2603/2604 is the system controller.Front Panel Indicators (DS1 – DS6)
There are six LEDs on the MVME2603/2604 front panel: CHS, BFL, CPU,
PCI, FUS, and SYS.
? CHS (DS1, yellow). Checkstop; driven by the MPC603/604 status
lines on the MVME2603/2604. Lights when a halt condition from
the processor is detected.
? BFL (DS2, yellow). Board Failure; lights when the BRDFAIL? signal
line is active.
? CPU (DS3, green). CPU activity; lights when the DBB? (Data Bus
Busy) signal line on the processor bus is active.
? PCI (DS4, green). PCI activity; lights when the IRDY? (Initiator
Ready) signal line on the PCI bus is active. This indicates that the
PCI mezzanine or carrier board (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.
Note Because the FUS LED monitors the status of several voltages on
the MVME2603/2604, it does not directly indicate the condition
of any single fuse. If the LED flickers or goes out, check all the
fuses (polyswitches).
? SYS (DS6, green). System Controller; lights when the Universe
ASIC in the MVME2603/2604 is the VMEbus system controller.
