Freescale Semiconductor Microcontrollers - Manual (Page 363)

ICS MON08 Interface Connection
Device Class Description
363 Microcontrollers Debugger Manual
Figure 13.14 Reset Connection
In this configuration, because the software does not directly control power to the
processor, the user is prompted to turn the processor's power supply on and off. Turning
off the power supply is necessary to pass the initial security mode check and access the
Flash on the processor. A simple reset is not enough; to pass the security check, you must
first force the processor to encounter a POR (power-on reset) which requires the
processor's voltage to dip below 0.1v. Once security is passed, resetting the device is
facilitated by the above circuitry.