Stop; Pseudo Stop; Wait; Run - Motorola MC9S12C-Family User Manual

Device User Guide — 9S12C128DGV1/D V01.05

4.4.1 Stop

Executing the CPU STOP instruction stops all clocks and the oscillator thus putting the chip in fully static
mode. Wake up from this mode can be done via reset or external interrupts.

4.4.2 Pseudo Stop

This mode is entered by executing the CPU STOP instruction. In this mode the oscillator is still running
and the Real Time Interrupt (RTI) or Watchdog (COP) sub module can stay active. Other peripherals are
turned off. This mode consumes more current than the full STOP mode, but the wake up time from this
mode is significantly shorter.

4.4.3 Wait

This mode is entered by executing the CPU WAI instruction. In this mode the CPU will not execute
instructions. The internal CPU signals (address and databus) will be fully static. All peripherals stay active.
For further power consumption reduction the peripherals can individually turn off their local clocks.

4.4.4 Run

Although this is not a low power mode, unused peripheral modules should not be enabled in order to save
power.

Section 5 Resets and Interrupts

5.1 Overview

Consult the Exception Processing section of the CPU12 Reference Manual for information.

5.2 Vectors

5.2.1 Vector Table

Table 5-1 lists interrupt sources and vectors in default order of priority.
Vector Address
External Reset, Power On Reset or Low
$FFFE, $FFFF Voltage Reset (see CRG Flags Register
$FFFC, $FFFD
$FFFA, $FFFB
$FFF8, $FFF9
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Table 5-1 Interrupt Vector Locations
Interrupt Source
to determine reset source)
Clock Monitor fail reset
COP failure reset
Unimplemented instruction trap
CCR
Local Enable
Mask
None None
None COPCTL (CME, FCME)
None COP rate select
None None
HPRIO Value
to Elevate
–
–
–
–