Integrated PCI Controller
The Crusoe Processor includes a PCI bus controller that is PCI 2.1 compliant. The PCI bus is 32 bits wide, operates at 33 MHz, and is compatible with 3.3V signal levels. It is not 5V tolerant, however. The PCI controller on provides a PCI host bridge, the PCI bus arbiter, and a DMA controller.
Serial ROM Interface
The Crusoe Processor includes a PCI bus controller that is PCI 2.1 compliant. The PCI bus is 32 bits wide, operates at 33 MHz, and is compatible with 3.3V signal levels. It is not 5V tolerant, however. The PCI controller on provides a PCI host bridge, the PCI bus arbiter, and a DMA controller.
Serial ROM Interface
The Crusoe Processor serial ROM interface is a five-pin interface used to read data from a serial flash ROM. The flash ROM is 1M-byte in size and provides nonvolatile storage for the Code Morphing software. During the boot process, the Code Morphing code is copied from the ROM to the Code Morphing memory space in SDRAM. Once transferred, the Code Morphing code requires 8 to 16Mbytes of memory space. The portion of SDRAM space reserved for Code Morphing software is not visible to x86 code. Transmeta supplies programming information for the flash ROM device. This interface may also be used for insystem reprogramming of the flash ROM.
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