Motorola MC9S12GC-Family ユーザーズマニュアル

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.

Table 5-1 Interrupt Vector Locations

Vector Address

Interrupt Source

CCR

Mask

Local Enable

HPRIO Value

to Elevate

$FFFE, $FFFF

External Reset, Power On Reset or Low
Voltage Reset (see CRG Flags Register

to determine reset source)

None

–

$FFFC, $FFFD

Clock Monitor fail reset

None

COPCTL (CME, FCME)

–

$FFFA, $FFFB

COP failure reset

None

COP rate select

–

$FFF8, $FFF9

Unimplemented instruction trap

None

–