General
Description
The IT8888F/G is
a PCI to ISA bridge single function device. The IT8888F/G serves as a
bridge between the PCI bus and ISA bus. The IT8888F/G¡¦s 32-bit PCI bus
interface is compliant with PCI Specification V2.1 and supports both PCI
Bus Master & Slave. The PCI interface supports both programmable
positive and full subtractive decoding schemes.
The
IT8888F/G also integrates two enhanced DMA Slave
controllers
for achieving PCI DMA cycles: PC/PCI DMA
Slave
Controller & Distributed DMA Slave Controllers.
The
device also contains one SM bus (single master mode)
which
can be connected to a Serial E2PROM for automatic power-on
configuration. ITE¡¦s proprietary (USA & Taiwan patent pending)
power-on auto-configuration through SM bus can provide customer
with maximum design flexibility.
The IT8888F/G also implements the optional fast positive decode of F, E,
D, C memory segments. This special feature can provide a direct
connection to an FALSH boot ROM.
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The
NOGO function, which is also implemented in the IT8888F/G for enabling or
disabling subtractive decode of PCI interface could be a software
controlled output pin from other host controlled devices. The Serial IRQ
is also implemented in the device for sending and receiving ISA IRQs &
IOCHCK#. The device includes an ISA interface
which supports full ISA compatible functions.
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The
IT8888G is available in 160-ball TFBGA package.
The
IT8888F is available in 160-pin PQFP package.
