ABB DSQC358C 3HAB8101-10-16 CPU module

ABB DSQC358C 3HAB8101-10-16 CPU module

The green VME LED (part of DS4) lights when the board is using the VMEbus (VMEbus AS* is asserted by the VMEchip2) or when the board is accessed by the VMEbus (VMEchip2 is the local bus master).Data Bus Structure The local data bus on the MVME162 is a 32-bit synchronous bus that is based on the MC68040 bus, and which supports burst transfers and snooping. The various local bus master and slave devices use the local bus to communicate. The local bus is arbitrated by priority type arbiter and the priority of the local bus masters from highest to lowest is: 82596CA LAN, 53C710 SCSI, VMEbus, and MPU. Generally speaking, any master can access any slave; however, not all combinations pass the common sense test. Refer to the MVME162 Embedded Controller Programmer’s Reference Guide and to the user’s guide for each device to determine its port size, data bus connection, and any restrictions that apply when accessing the device.

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