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F85226 Datasheet(PDF) 6 Page - Feature Integration Technology Inc. |
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F85226 Datasheet(HTML) 6 Page - Feature Integration Technology Inc. |
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6 / 44 page  Fintek Feature Integration Technology Inc. F85226 July, 2007 V0.25P 1 F85226 1. General Description The F85226 is a LPC to ISA Bridge IC for new generation chipset which is no support for ISA bus and slots. However the demand of ISA devices still exists. Therefore LPC to ISA Bridge IC is necessary to be used for new chipset system. The F85226 is the best selection even though there is the PCI to ISA Bridge for supporting ISA device, because the issue of package size is critical for layout requirement. Follows the point at these issues, the F85226 is optimal solution for the non-ISA chipset, the package of F85226 will be the best chosen for economic solution and save the layout size of Motherboard. The F85226 absolutely meets LPC spec. 1.1 and supports fully ISA interface. Provides multi-ISA compatible slots without buffering and supports ISA parallel IRQ transfer to serial IRQ by IRQ Serialier. The F85226 also provides programmable general purpose I/O pins for user. It is completely LPC to ISA bridge specialized chip. 2. Features Meets LPC spec. 1.1 Supports LDRQ#(LPC DMA), SERIRQ(Serial IRQ) Fully ISA bridge support except bus master(By conditions) Supports 8/16bit I/O and memory R/W All software transparent All ISA signals can be isolate ISA parallel IRQ transfer to serial IRQ by IRQ Serialier Supports multi-slots without buffering Supports the PCI clock to divide by 3 or 4 for ISA bus Supports to generate two 14.318MHz buffer out from one 14.318MHz in 4 sets of address decoder supported Supports programmable general purpose I/O pins Powered by 3Vcc (Signal 5V tolerance) 128pin PQFP package 3. Key Specifications Supply Voltage 3.0v to 3.6v Operating Supply current 4mA typ. |
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