
82C814
912-3000-047
Revision: 1.0
Page 13
January 08, 1998
OPTi
4.0
Functional Description
4.1
OPTi Docking Station Controller 
Chipset
The OPTi Docking Station solution is comprised of two
devices. The minimum configuration requires one chip, the
82C814 part.
 The 144-pin 82C814 Docking Controller handles the signal 
transfer for a complete PCI bus, including interrupts and 
clock generation.
 The OPTi PCI-ISA Bridge converts PCI signals back into 
ISA signals. No OPTi PCI-ISA Bridge is required in the 
system, but one can be added as an option to support ISA 
peripherals in an attached docking station that connects 
through the PCI bus interface. The OPTi PCI-ISA Bridges 
are discussed in a separate document.
The multiple interface arrangement offers the maximum in
system design flexibility. 
4.2
Because the OPTi Docking Station Controller Chipset is
based on a PCI host interface, it can be used with any PCI-
Chipset Compatibility
compliant system. ISA DMA may require special software
support on non-OPTi systems.
4.3
The OPTi 82C814 Docking Station Controller Chipset uses
two independent external interfaces. The terms 
host interface
and 
docking interface
 are used throughout this document to
describe these interfaces.
Interface Overview
 The 
host interface
 provides industry standard PCI signals 
to the host system. The interface also can be programmed 
to return interrupt requests from the docking interfaces.
 The 
docking interface
 duplicates the primary PCI signal 
set. It is completely isolated from the primary PCI bus.
The interface signal groups used to integrate the OPTi Dock-
ing Station Controller Chipset into the standard system are
described in the following sections. Figure 4-1 illustrates the
interaction of the logic modules of the OPTi Docking Station
Controller Chipset.
Figure 4-1
82C814 Organization
OPTi
PCI-to-ISA
Bridge
PCI-to-CardBus
Bridge #0
PCI Ctrl, Address, Data
P
r
m
a
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y
P
C
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B
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PCI Slots
ISA Slots
CCLK[3:0]
PCIRQ[3:0]#
PCI
IRQs
REQ#
GNT#
Master Req
External
Clock
Source
PCICLK
PCI Function #0
Cfg. Registers
IRQ Driveback
Logic
H
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P
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I
Clock
Generation
Logic
S
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d
a
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y
P
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B
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Bus Arbiter
Logic
D
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c
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S
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