IT8888F/G PCI to ISA Bridge Chip

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 DMASlave 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.
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.

The IT8888G is available in 160-ball TFBGA package.
The IT8888F is available in 160-pin PQFP package.
 

PART NO	PACKAGE TYPE	DESCRIPTION	FLASH SUPPORT
IT8888F	160-pin QFP 28mm x 28mm	PCI to ISA Bridge Chip
IT8888G	160-ball TFBGA 12mm x 12mm	PCI to ISA Bridge Chip

PCI Interface
Programmable PCI Address Decoders
PC/PCI DMA Controller
Distributed DMA Controller
ISA Interface
SM Bus
1 analog line-level mono output: MONO_OUT
Power-on Serial Bus Configuration
Serial IRQ
Optional FLASH ROM Interface
Versatile power-on strapping options
Supports NOGO function
Single 33 MHz Clock Input
+3.3V PCI I/F with +5V tolerant I/O buffers
+5V ISA I/F and core Power Supply
Package: 160-ball TFBGA or 160-pin QFP

NO	RELEASE DATE	TITLE	DOWNLOAD
01	2005/05/19	IT8888F_V0.9
02	2005/05/16	IT8888G_V0.9