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PCI Interface Chip CH365 |
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| 1. Introduction |
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CH365 is a universal PCI bus interface chip.It supports the I/O mapping,memory mapping,expansion ROM and interrupters.CH365 transforms the high-speed 32-bit PCI bus into 8-bit active parallel ISA analogue.It is very useful to make the low cost PC card based on PCI bus or update ISA bus to PCI bus.Comparing with other popular buses,the speed of PCI bus is faster and the capability of real-time and control is better.So CH365 is applied to the I/O control card,communication interface card, A/D&D/A card,electron disk and expansion ROM,which are high speed and real-time.The following is base application plan. |
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●Realize the slave device interface based on the 32-bit PCI bus.
●Convert PCI interface into active parallel:8-bit data bus,16-bit address bus,I/O read and write,memory read and write.
●Set device identifier (Vendor ID,Device ID,Class code and so on).
●Write and read I/O port or memory by byte,word and double word.
●The speed in test can reach to 7MB per second in no burst transfer condition and the pulse width can be chosen from 30ns to 240ns at the 30ns interval
●Distribute I/O base address automatically,and support the 240 words I/O ports.
●Support local hardware fixed addressing function,which can realize the I/O addressing at the appointed position by choosing I/O port freely.
●Update the ISA I/O card to PCI bus directly without modifying the interrelated software of ISA card.
●Support the direct mapping of the 32KB memory SRAM or expansion ROM (Boot ROM).
●Support the 64KB or 128KB memory or expansion ROM without adding the external components.
●Support the expansion ROM without bootable hard disk and Flash-memory updated on line.
●Provide the expansion ROM application subprogram library BRM which is used to display user interface and deal with data under BIOS.
●Support low local interrupt request and shareable interrupt.
●Provide simple 2-wire serial host interface which is commonly connected with the similar component of 24C0X EEPROM.
●Contain hardware counters from 4us to 1ms that is the delay reference in the software runtime.
●Adapt the big pin interval PQFP-80 encapsulation that is compatible with CH365 pins.
●Universal driver supports windows 98/2000/xp and provide the API through DLL.
●CH365 chip itself and the card upgrade works without driver.
●Own some patents. Its usage is easy and its cost is low. |
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| 3. Package |
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