AS-P892-000電源模塊,使用數量
中止開(kāi)關(guān)（S1）當由軟件激活時(shí)，中止開(kāi)關(guān)可以生成中斷從基板到處理器的信號處于用戶(hù)可編程水平。中斷通常用于中止程序執行并返回控制MVME2603/2604 ROM中的調試器固件和閃存。中斷信號通過(guò)以下途徑到達處理器模塊：ISA總線(xiàn)中斷線(xiàn)IRQ8?. 該信號也可在的引腳PB7處獲得Z8536 CIO設備，處理各種狀態(tài)信號、串行輸入/輸出線(xiàn)，和計數器。
AS-P892-000電源模塊連接到中止開(kāi)關(guān)的斷路器是一個(gè)邊緣敏感電路，過(guò)濾以消除開(kāi)關(guān)反彈。復位開(kāi)關(guān)（S2）重置開(kāi)關(guān)重置所有車(chē)載設備；它還驅動(dòng)系統重置?如果MVME2603/2604是系統控制器，則發(fā)出信號。Universe ASIC包括全局和局部復位驅動(dòng)器。什么時(shí)候Universe作為VMEbus系統控制器、重置驅動(dòng)程序運行通過(guò)斷言VMEbus信號SYSRESET來(lái)提供全局系統重置?.系統重置? 信號可能由復位開(kāi)關(guān)產(chǎn)生，通電重置、看門(mén)狗超時(shí)或通過(guò)雜項控件中的控制位在Universe ASIC中注冊（MISC\U CTL）。系統重置? 保留聲明按照VMEbus規范的要求，至少持續200毫秒。類(lèi)似地，Universe ASIC將輸入信號和控制位提供給啟動(dòng)本地重置操作。通過(guò)設置控制位，軟件可以將電路板保持在重置狀態(tài)，禁止故障電路板參與在正常系統操作中。即使在以下情況下，也會(huì )啟用本地重置驅動(dòng)程序通用ASIC不是系統控制器?？赡軙?huì )產(chǎn)生局部重置通過(guò)重置開(kāi)關(guān)、通電重置、看門(mén)狗超時(shí)、VMEbus系統重置?, 或MISC\U CTL寄存器中的控制位。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)驅動(dòng)MVME2603/2604上的線(xiàn)路。當停止條件從檢測到處理器。
? BFL（DS2，黃色）。電路板故障；BRD故障時(shí)亮起? 信號線(xiàn)路處于活動(dòng)狀態(tài)。
? CPU（DS3，綠色）。CPU活動(dòng)；DBB時(shí)亮起? （數據總線(xiàn)忙）處理器總線(xiàn)上的信號線(xiàn)處于活動(dòng)狀態(tài)。? PCI（DS4，綠色）。PCI活動(dòng)；當IRDY? （發(fā)起人就緒）PCI總線(xiàn)上的信號線(xiàn)處于活動(dòng)狀態(tài)。這表明PCI夾層（如果已安裝）處于活動(dòng)狀態(tài)。
? FUS（DS5，綠色）。保險絲正常；+5V DC、+12V DC和–從基板到過(guò)渡電路提供12V直流電源模塊和遠程設備。
ABORT Switch (S1)
When activated by software, the ABORT switch can generate an interrupt
signal from the base board to the processor at a user-programmable level.
The interrupt is normally used to abort program execution and return
control to the debugger firmware located in the MVME2603/2604 ROM
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 resets all onboard devices; it also drives a SYSRESET?
signal if the MVME2603/2604 is the system controller.
The Universe ASIC includes both a global and a local reset driver. When
the Universe operates as the VMEbus system controller, the reset driver
provides a global system reset by asserting the VMEbus signal SYSRESET?.
A SYSRESET? signal may be generated by the RESET switch, a power-up
reset, a watchdog timeout, or by a control bit in the Miscellaneous Control
Register (MISC_CTL) in the Universe ASIC. SYSRESET? remains asserted
for at least 200 ms, as required by the VMEbus specification.
Similarly, the Universe ASIC supplies an input signal and a control bit to
initiate a local reset operation. By setting a control bit, software can
maintain a board in a reset state, disabling a faulty board from participating
in normal system operation. The local reset driver is enabled even when
the Universe ASIC is not system controller. Local resets may be generated
by the RESET switch, a power-up reset, a watchdog timeout, a VMEbus
SYSRESET?, or a control bit in the MISC_CTL register.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 (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.
