140CPU31110處理器模塊，SCHNEIDER參數說(shuō)明
看門(mén)狗定時(shí)器PCC包括看門(mén)狗定時(shí)器功能。當由啟用時(shí)軟件，看門(mén)狗定時(shí)器可編程為重置
模塊（如果是系統控制器）。每當看門(mén)狗定時(shí)器超時(shí)時(shí)，故障指示燈點(diǎn)亮（除了BRDFAIL位在VMEchip中設置）?？撮T(mén)狗定時(shí)器對滴答定時(shí)器1的輸出進(jìn)行計數。如果看門(mén)狗定時(shí)器不會(huì )由編程內的軟件重置滴答聲的數量，它超時(shí)。
140CPU31110處理器模塊打印機接口PCC具有與Centronics兼容的打印機接口。打印機當MC68030準備好接收數據或出現故障。中斷級別可編程，并提供請求時(shí)的狀態(tài)/ID向量?？刂坪蜖顟B(tài)寄存器PCC具有輸入和輸出信號線(xiàn)，用于控制各種MVME147上的功能。DRAM有控制線(xiàn)奇偶校驗啟用、奇偶校驗測試和奇偶校驗錯誤狀態(tài)、VMEbus映射選擇、多地址RMC模式和LANCE地址選擇。重置和中止開(kāi)關(guān)PCC提供重置和中止開(kāi)關(guān)接口。復位開(kāi)關(guān)信號被解除抖動(dòng)，當其啟用時(shí)，它將導致復位輸出信號。復位開(kāi)關(guān)可以啟用/禁用通過(guò)軟件。
中止開(kāi)關(guān)信號被解除抖動(dòng)并發(fā)送到7級斷續器。啟用時(shí)，中止開(kāi)關(guān)導致7級中斷至MC68030。中斷器返回狀態(tài)/ID請求時(shí)的矢量?？梢詥⒂?禁用中止開(kāi)關(guān)通過(guò)軟件。通電復位當PCC接收到通電復位信號時(shí)，它會(huì )生成一個(gè)復位信號輸出信號并在控制寄存器中設置通電位。這個(gè)
通電位可由軟件用于確定何時(shí)發(fā)生通電重置。
Watchdog Timer
The PCC includes a watchdog timer function. When enabled by
software, the watchdog timer may be programmed to reset the
module if it is system controller. Whenever the watchdog timer
times out, the FAIL LED is lit (in addition to when the BRDFAIL bit
is set in the VMEchip).
The watchdog timer counts outputs from tick timer 1. If the
watchdog timer is not reset by software within the programmed
number of ticks, it times out. Printer Interface
The PCC has a Centronics compatible printer interface. The printer
interface interrupts the MC68030 when it is ready for data or when
a fault occurs. The interrupt level is programmable and it provides
a status/ID vector when requested.
Control and Status Registers
The PCC has input and output signal lines for controlling various
functions on the MVME147. There are control lines for DRAM
parity enable, parity test and parity error status, VMEbus map
select, multiple address RMC mode, and LANCE address select.
RESET and ABORT Switches
The PCC provides the RESET and ABORT switch interface.
The RESET switch signal is debounced and when it is enabled, it
causes a reset out signal. The RESET switch can be enabled/disabled
by software.
The ABORT switch signal is debounced and sent to the level 7
interrupter. When it is enabled, the ABORT switch causes a level 7
interrupt to the MC68030. The interrupter returns a status/ID
vector when requested. The ABORT switch can be enabled/disabled
by software.
Power-Up Reset
When the PCC receives a power-up reset signal, it generates a reset
out signal and sets the power-up bit in the control register. The
power-up bit can be used by software to determine when a powerup reset has occurred.
