Patent ID: 7386713
Filing Date: 2008-06-10
Classification: G06F

Abstract:
1. A boot method for use in a mobile device having FLASH memory storing a key value and content comprising boot instructions stored in a security location, an internal read-only memory storing boot program code and a predetermined security value, and a serial port, execution of the boot program code stored in the read-only memory causing the mobile device to perform the steps of: reading the key value from a security location in the FLASH memory, the key value being independent of the content of the FLASH memory; comparing the key value to a predetermined security value stored in the internal read-only memory, the predetermined security value being independent of the content of the FLASH memory; and depending on the result of the comparison of the key value to the predetermined security value, either polling the serial port for activity or jumping to the FLASH memory for execution of boot instructions stored therein.