GVC736CE101 3BHE039203R0101脉冲输入卡件
因为时钟方向不正确。图2-4（表1和表2）显示了使用EIA-530 SIMM的两种配置的控制器。图2-5（表3和4）显示了当控制器与MVME712A/AM/-12/-13一起使用时，端口B可用的两种配置。图2-6显示了使用EIA-485/EIA-422 SIMM可用配置的控制器！注意：不要同时将串行数据设备连接到MVME712系列转换模块和MVME162FX嵌入式控制器前面板上的等效端口。这可能导致同时传输冲突数据。1-22计算机组文献中心网站板级硬件描述1！注意不要将外围设备连接到MVME712x转换模块上的端口1、端口3或Centronics打印机端口。在EIA-232-D情况下，这些端口均未连接到任何MVME162电路。在EIA-530的情况下，尝试使用这些端口会产生某些连接，有可能损坏MVME162或外围设备！警告：使用EIA-530 SIMM或EIA-485/EIA-422 SIMM时，请勿将MVME162FX嵌入式控制器连接到MVME712x板。P2适配器和转接板不支持EIA-530、EIA-485和EIA-422信号。工业包（IP）接口MVME162FX嵌入式控制器上的IP2芯片ASIC支持四个工业包（IP）接口：可从前面板访问。IP2还包括四个DMA信道（每个IP一个，或每个双尺寸IP两个）、32MHz或8MHz工业组时钟选择（跳线可选）和一个连接到四个接口的可编程时基选通。有关IP接口的详细信息，请参阅《MVME162FX嵌入式控制器程序员参考指南》中的IP2芯片编程模型。有关IP连接器的引脚分配，请参阅附录B。注意：MVME162FX嵌入式控制器不会监控电源+5Vdc电源，如果电源过低，则会断言IP重置。相反，IP重置由162Bug调试器的ENV命令处理，如第5章所述。插入同一MVME162FX嵌入式控制器的两个IP模块不能使用Strobe*线相互通信，因为Strobe*信号是IP2芯片向插入同一控制器的所有四个IP模块的输出。功能描述http://www.mcg.mot.com/literature1-23 1可选LAN以太网接口MVME162FX嵌入式控制器使用82596CA实现以太网收发器接口。82596CA使用DMA操作访问本地RAM以执行其正常功能。由于82596CA具有较小的内部缓冲区，并且VMEbus具有未定义的等待时间，如果DMA被编程为访问VMEbus，则可能会发生缓冲区溢出。因此，82596CA不应编程为访问VMEbus。每个具有以太网接口的控制器都分配了一个以太网站地址。地址为$08003E2xxxxx，其中xxxxx是分配给电路板的唯一5个半字节数（即，每个控制器的xxxxx值不同）。每个板都有一个以太网站地址显示在VMEbus P2连接器上的标签上。此外，包括以太网地址在内的六个字节存储在BBRAM的配置区域中。也就是说，08003E2xxxxx存储在BBRAM中。在$FFFC1F2C地址处，可以读取上四个字节（08003E2x）。在地址$FFFC1F30处，可以读取下两个字节（xxxx）。控制器的调试器能够检索或设置以太网地址。如果BBRAM中的数据丢失，用户应使用VMEbus P2连接器标签上的数字进行恢复。以太网收发器接口位于MVME162FX控制器上，行业DB15标准连接器位于MVME712x转接板上。82596CA的支持功能由MC2芯片ASIC提供。有关详细编程信息，请参阅82596CA用户指南。可选SCSI接口MVME162FX嵌入式控制器可通过行业标准SCSI总线提供大容量存储子系统。这些子系统可能包括硬盘和软盘驱动器、流式磁带驱动器和其他大容量存储设备。SCSI接口使用NCR 53C710 SCSI I/O控制器实现。1-24计算机组文献中心网站板级硬件描述1 53C710的支持功能由MC2芯片ASIC提供。有关详细编程信息，请参阅53C710用户指南。SCSI终端系统技术人员必须确保SCSI总线
because of the incorrect clock direction. Figure 2-4 (sheets 1 and 2) shows the controller with the two configurations available using the EIA-530 SIMMs. Figure 2-5 (sheets 3 and 4) shows the two configurations available for Port B when the controller is used with an MVME712A/AM/-12/-13. Figure 2-6 shows the controller with the configuration available using the EIA-485/EIA-422 SIMM. ! Caution Do not simultaneously connect serial data devices to the equivalent ports on the MVME712 series transition module and the MVME162FX Embedded Controller’s front panel. This could result in simultaneous transmission of conflicting data. 1-22 Computer Group Literature Center Web Site Board Level Hardware Description 1 ! Caution Do not connect peripheral devices to Port 1, Port 3, or the Centronics printer port on the MVME712x transition module. In the EIA-232-D case, none of these ports are connected to any MVME162 circuits. In the EIA-530 case, attempting to use these ports would produce certain connections with the potential to damage the MVME162 or the peripherals. ! Caution When using an EIA-530 SIMM or an EIA-485/EIA-422 SIMM, do not connect the MVME162FX Embedded Controller to an MVME712x board. The EIA-530, EIA-485, and EIA-422 signals are not supported by the P2 adapter and the transition boards. Industry Pack (IP) Interfaces The IP2 chip ASIC on the MVME162FX Embedded Controller supports four Industry Pack (IP) interfaces: these are accessible from the front panel. The IP2 also includes four DMA channels (one for each IP, or two for each double size IP), 32MHz or 8MHz Industry Pack clock selection (jumper selectable), and one programmable timebase strobe which is connected to the four interfaces. Refer to the IP2 chip Programming Model in the MVME162FX Embedded Controller Programmer’s Reference Guide for details of the IP interface. Refer also to Appendix B for the pin assignments of the IP connectors. Notes MVME162FX Embedded Controllers do not monitor power supply +5 Vdc power and assert IP reset if the power falls too low. Instead, IP reset is handled by the ENV command of the 162Bug debugger, as described in Chapter 5. Two IP modules plugged into the same MVME162FX Embedded Controller can not use the Strobe∗ line to communicate with each other, because the Strobe∗ signal is an output from the IP2 chip to all four IP modules that plug into the same controller. Functional Description http://www.mcg.mot.com/literature 1-23 1 Optional LAN Ethernet Interface The MVME162FX Embedded Controller uses the 82596CA to implement the Ethernet transceiver interface. The 82596CA accesses local RAM using DMA operations to perform its normal functions. Because the 82596CA has small internal buffers and the VMEbus has an undefined latency period, buffer overrun may occur if the DMA is programmed to access the VMEbus. Therefore, the 82596CA should not be programmed to access the VMEbus. Every controller that has the Ethernet interface is assigned an Ethernet Station Address. The address is $08003E2xxxxx where xxxxx is the unique 5-nibble number assigned to the board (i.e., every controller has a different value for xxxxx). Each board has an Ethernet Station Address displayed on a label attached to the VMEbus P2 connector. In addition, the six bytes including the Ethernet address are stored in the configuration area of the BBRAM. That is, 08003E2xxxxx is stored in the BBRAM. At an address of $FFFC1F2C, the upper four bytes (08003E2x) can be read. At an address of $FFFC1F30, the lower two bytes (xxxx) can be read. The controller’s debugger has the capability to retrieve or set the Ethernet address. If the data in the BBRAM is lost, the user should use the number on the VMEbus P2 connector label to restore it. The Ethernet transceiver interface is located on the MVME162FX controller, and the industry DB15 standard connector is located on the MVME712x transition board. Support functions for the 82596CA are provided by the MC2 chip ASIC. Refer to the 82596CA user's guide for detailed programming information. Optional SCSI Interface The MVME162FX Embedded Controller may provide for mass storage subsystems through the industry-standard SCSI bus. These subsystems may include hard and floppy disk drives, streaming tape drives, and other mass storage devices. The SCSI interface is implemented using the NCR 53C710 SCSI I/O controller. 1-24 Computer Group Literature Center Web Site Board Level Hardware Description 1 Support functions for the 53C710 are provided by the MC2 chip ASIC. Refer to the 53C710 user’s guide for detailed programming information. SCSI Termination The system technician must ensure that the SCSI bus is
