CSA464AE模块，ABB使用尺寸
PCI仲裁MVME2603/2604单总线上有七个潜在的PCI总线主机板机：
❏ Raven ASIC（MPU/PCI总线桥控制器）
❏ Winbond W83C553 PIB（PCI/ISA总线桥控制器）
❏ DEC芯片21140以太网控制器
❏ SYM53C825A SCSI控制器
❏ Universe ASIC（PCI/VME总线桥控制器）
❏ PMC插槽1（PCI夹层卡）
CSA464AE模块❏ PMC插槽2（PCI扩展）Winbond W83C553 PIB设备提供PCI仲裁支持对于这七种类型的设备。PIB支持灵活的仲裁固定优先级、旋转优先级和混合优先级模式，如适用于给定应用。可以找到PCI仲裁的详细信息在MVME2600系列单板计算机程序员的参考指南，见附录D，相关文件。MVME2603/2604的仲裁分配如下表。中断处理Raven ASIC，控制PHB（PCI主机桥）MPU/本地总线MVME2603/2604上的接口功能，执行中断处理也中断源可以是以下任何一种：
❏ Raven ASIC本身（计时器中断或传输错误中断）
❏ 处理器（处理器自中断）
❏ Falcon芯片组（内存错误中断）
❏ PCI总线（来自PCI设备的中断）
❏ ISA总线（从ISA设备中断）图2-3说明了MVME2603/2604上的中断架构。对于有关中断处理的详细信息，请参阅MVME2600系列单板附录D中列出的《计算机程序员参考指南》，相关
文档PIB支持七个DMA通道。通道0到3支持8位DMA设备。通道5到7专用于16位DMA设备。信道分配如下：复位源MVME2603/2604 SBC有八个潜在的复位源：
1、上电复位
2、复位开关（当MVME2603/2604为系统控制器）
3.SGS Thomson控制的看门狗定时器重置功能
MK48T559计时器设备（当MVME2603/2604为系统控制器）
PCI Arbitration
There are seven potential PCI bus masters on the MVME2603/2604 single
board computer:
❏ Raven ASIC (MPU/PCI bus bridge controller)
❏ Winbond W83C553 PIB (PCI/ISA bus bridge controller)
❏ DECchip 21140 Ethernet controller
❏ SYM53C825A SCSI controller
❏ Universe ASIC (PCI/VME bus bridge controller)
❏ PMC Slot 1 (PCI mezzanine card)
❏ PMC Slot 2 (PCI expansion)
The Winbond W83C553 PIB device supplies the PCI arbitration support
for these seven types of devices. The PIB supports flexible arbitration
modes of fixed priority, rotating priority, and mixed priority, as
appropriate in a given application. Details on PCI arbitration can be found
in the MVME2600 Series Single Board Computer Programmer’s
Reference Guide, listed in Appendix D, Related Documentation.
The arbitration assignments for the MVME2603/2604 are shown in the
following table.Interrupt Handling
The Raven ASIC, which controls PHB (PCI Host Bridge) MPU/local bus
interface functions on the MVME2603/2604, performs interrupt handling
as well. Sources of interrupts may be any of the following:
❏ The Raven ASIC itself (timer interrupts or transfer error interrupts)
❏ The processor (processor self-interrupts)
❏ The Falcon chip set (memory error interrupts)
❏ The PCI bus (interrupts from PCI devices)
❏ The ISA bus (interrupts from ISA devices)
Figure 2-3 illustrates interrupt architecture on the MVME2603/2604. For
details on interrupt handling, refer to the MVME2600 Series Single Board
Computer Programmer’s Reference Guide, listed in Appendix D, Related
Documentation.The PIB supports seven DMA channels. Channels 0 through 3 support
8-bit DMA devices. Channels 5 through 7 are dedicated to 16-bit DMA
devices. The channels are allocated as follows:Sources of Reset
The MVME2603/2604 SBC has eight potential sources of reset:
1. Power-on reset
2. RESET switch (resets the VMEbus when the MVME2603/2604 is
system controller)
3. Watchdog timer Reset function controlled by the SGS-Thomson
MK48T559 timekeeper device (resets the VMEbus when the
MVME2603/2604 is system controller)
