8051IP核BootstrapDemoDesignUserGuide很好的资料 GeneralDescription ThefollowingprogramallowstheMC8051microcontrollertoloadmostofitscodeintoapartoftheexternaldatamemory(XRAM)overaseriallinkafterpowerup.Thisprogramcanbethenexecutedoutoftheprogrammemory(PRAM)