User`s guide

Introduction • 5
1.3.1 CompactPCI Bus Interface
The cPCI-6810/6820 operates in a 6U CompactPCI system. The CompactPCI
standard is electrically identical to the PCI local bus standard but has been
enhanced to work in harsh environments and support more peripheral slots.
Additionally, when used in a Hot Swap compliant backplane and in
accordance with the CompactPCI Hot Swap Specification, PICMG 2.1,
Version 1.0, the cPCI-6810/6820 supports hosting hot swappable peripherals
in a powered system. The cPCI-6810/6820 can also function in a standard
(non-Hot Swap) CompactPCI system without live insertion and extraction
capability.
1.3.2 PCI-to-PCI Bridge
The HiNT HB6 is a tri-mode universal PCI-to-PCI Bridge and is used to
implement the system/peripheral slot on the cPCI-6810/6820. The
three-mode bridge is capable of operating in Transparent, Non Transparent or
Universal mode. The HB6 Non Transparent mode permits independent
memory mapping of both primary and secondary buses with powerful
configuration options to support intelligent subsystems. The Universal mode
permits jumper-less configuration between application to CompactPCI
interface at Peripheral Slot and System Slot. With the Universal option, the
HB6 Bridge can be configured as a transparent bridge in a System Slot
supporting a host, or as a Non Transparent bridge in a Peripheral Slot as an
intelligent subsystem. These options allow the cPCI-6810/6820 board to be
inserted into both the Peripheral Slot and the System Slot.
In addition to the 66MHz/64bit capability, allowing the host bus and subsystem
bus to operate at different speeds. Together with 64-bit to 32-bit access
conversion, system architects can utilize the bridge and connect slower or
higher speed controllers on primary or secondary bus, hence supporting
independent speed and data bus frequency on either side of the PCI bus.