I refer to the imx28_evk board, make my own PCB board. When I burn my firmware with MfgTool.exe, which cannot dectected the i.mx28 cpu.
details: I pressed the switch more than 5 seconds , and the voltage of cpu pin PSWITH is 2.32V, and my boot mode is GPMI(NAND 3.3v)。
question: Why MfgTool.exe can not detect i.mx28? what is the necessary conditions were fulfilled to enter recovery mode? and what is the timing sequence of recovery mode?