Method and apparatus for booting a microprocessor

摘要

A method and system for bootstrapping a processor from a volatile memory device connected to the processor is disclosed. The first processor is bootstrapped from flash device. The reset lines of the second processor are asserted. The boot code for the second processor is loaded from the flash device into the volatile memory device. The reset lines of the second processor are de-asserted, wherein the processor then boots from the boot code stored in the volatile memory device. The same boot-strapping method can be extended to multi-drop systems where number of secondary processor can be more than one. A switchable means for the second processor to boot from volatile memory as described or from flash memory. A method also describes a mechanism to boot from synchronous volatile memory devices.