MC9S12HZ256 Datasheet, PDF (642/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Appendix A Electrical Characteristics
A.5.1.3 External Reset
When external reset is asserted for a time greater than PW_RSTL the CRG module generates an internal
reset, and the CPU starts fetching the reset vector without doing a clock quality check, if there was an
oscillation before reset.
A.5.1.4 Stop Recovery
Out of STOP the controller can be woken up by an external interrupt. A clock quality check as after POR
is performed before releasing the clocks to the system.
A.5.1.5 Pseudo Stop and Wait Recovery
The recovery from Pseudo STOP and Wait are essentially the same since the oscillator was not stopped in
both modes. The controller can be woken up by internal or external interrupts. After t_wrs the CPU starts
fetching the interrupt vector.
MC9S12HZ256 Data Sheet, Rev. 2.04
642
Freescale Semiconductor