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3 • Embedded PC/RTOS Features
GE Intelligent Platforms' V7865 features additional capabilities beyond those of a
typical desktop computer system. The unit provides four software-controlled,
general-purpose timers along with a programmable Watchdog Timer for
synchronizing and controlling multiple events in embedded applications. The
V7865 also provides a bootable CompactFlash system and 32 KByte of non-
volatile SRAM. Also, the V7865 supports an embedded intelligent VME bridge to
allow compatibility with the most demanding VME applications. These features
make the unit ideal for embedded applications, particularly where standard hard
drives and floppy disk drives cannot be used.
3.1 VME Bridge
In addition to its PC/AT functions, the V7865 has the following VME features:
The Tundra Tsi148 allows VME to run at a bandwidth of up to 320 MByte/s along
the full length of a 21-slot backplane. This increases the performance in the
following ways:
Other standard features include:
The V7865 VME interface is based on the high performance PCIX-to-VME
interface from the Tundra Tsi148. Providing a 64-bit bus width capable of
operating at 100 MHz, the Tundra Tsi148 uses PCI-X version 2.0 mode 1. Tsi148 is
fully compliant with both 2eSST and VME64 Extension standards.
The functions and programming of the Tsi148-based VME interface are addressed
in detail in the Tsi148 PCI/X-to-VME Bus Bridge User Manual.
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• 2eSST VME transfers
• 8x faster than the 40 MByte/s transfer rate of VME64
• 3x faster than a multi-domain, 64-bit/66 MHz CompactPCI bus
• Broadcast Mode support for sending data to multiple cards at one time
• Legacy protocol support
• User-configured interrupter
• User-configured interrupt handler
• Full VME system controller functionality
• Two programmable DMA controllers
• System Controller auto detection
Embedded PC/RTOS Features 41
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