B&R 7AO352.70旋入式模塊，7AO352.70使用手冊
初始條件在您驗證所有必要的硬件準備已完成后已完成，所有連接均已正確完成，并且安裝完成后，您可以啟動(dòng)系統。將功率應用于系統（以及重置系統）觸發(fā)MVME172LX的MPU、硬件和固件以及系統閃存駐留固件初始化MVME172LX上的設備為啟動(dòng)操作系統做準備。固件為出廠(chǎng)時(shí)附帶一組適當的默認值。在大多數情況下在啟動(dòng)之前，無(wú)需修改固件配置操作系統。有關(guān)這方面的詳細信息，請參閱第3章和MVME172Bug固件的用戶(hù)文檔。
B&R 7AO352.70旋入式模塊施加功率2當系統通電（或重置）時(shí)，固件將執行一些自檢并繼續進(jìn)行硬件初始化。系統啟動(dòng)流程按預定順序進(jìn)行，遵循層次結構處理器和MVME172LX硬件固有。數字下圖顯示了發(fā)生的基本初始化序列的流程在系統啟動(dòng)期間。啟動(dòng)前檢查表在給MVME172LX系統通電之前，請確保：存在條件：MVME172LX VME上的跳線(xiàn)和/或配置開(kāi)關(guān)根據需要設置嵌入式控制器和相關(guān)設備適用于您的特定應用。2.MVME172LX板的安裝和電纜連接視情況而定適用于您的特定機箱或系統，如第1章所述。3、您計劃用作系統控制臺的終端已連接至MVME172LX模塊上的控制臺端口（串行端口1）。4、終端設置如下：–每個(gè)字符8位–每個(gè)字符一個(gè)停止位奇偶校驗禁用（無(wú)奇偶校驗保護）–波特率9600波特（許多串行端口的默認波特率通電時(shí)）5、您希望使用的任何其他設備，如主機系統和/或外圍設備連接到適當的連接器。完成上面列出的檢查后，您可以為系統
Initial Conditions
After you have verified that all necessary hardware preparation has been
done, that all connections have been made correctly, and that the
installation is complete, you can power up the system. Applying power to
the system (as well as resetting it) triggers an initialization of the
MVME172LX’s MPU, hardware, and firmware along with the rest of the
system.
The Flash-resident firmware initializes the devices on the MVME172LX
board in preparation for booting the operating system. The firmware is
shipped from the factory with an appropriate set of defaults. In most cases
there is no need to modify the firmware configuration before you boot the
operating system. For specifics in this regard, refer to Chapter 3 and to the
user documentation for the MVME172Bug firmware.Applying Power 2
When you power up (or when you reset) the system, the firmware executes
some self-checks and proceeds to the hardware initialization. The system
startup flows in a predetermined sequence, following the hierarchy
inherent in the processor and the MVME172LX hardware. The figure
below charts the flow of the basic initialization sequence that takes place
during system startup.Pre-Startup Checklist
Before you power up the MVME172LX system, be sure that the following
conditions exist:
1. Jumpers and/or configuration switches on the MVME172LX VME
Embedded Controller and associated equipment are set as required
for your particular application.
2. The MVME172LX board is installed and cabled up as appropriate
for your particular chassis or system, as outlined in Chapter 1.
3. The terminal that you plan to use as the system console is connected
to the console port (serial port 1) on the MVME172LX module.
4. The terminal is set up as follows:
– Eight bits per character
– One stop bit per character
– Parity disabled (no parity protection)
– Baud rate 9600 baud (the default baud rate of many serial ports
at power-up)
5. Any other device that you wish to use, such as a host computer
system and/or peripheral equipment, is cabled to the appropriate
connectors.
After you complete the checks listed above, you are ready to power up the
system.
