MC68HC05PV8 Datasheet, PDF (91/196 Pages) Freescale Semiconductor, Inc – Techinal Data - rev 1.9

Freescale Semiconductor, Inc.
STOP
WAIT
STOP OSCILLATOR
AND ALL CLOCKS
CLEAR I BIT
OSCILLATOR ACTIVE
TIMER CLOCK ACTIVE
PROCESSOR CLOCKS
STOPPED
Operating Modes
WAIT Mode
RESET
N _{OR HVR OR LVR}
IRQ
Y
PORT A OR C
N
HVI, LVI
Y
TURN ON
OSCILLATOR
WAIT FOR TIME
DELAY TO
STABILIZE
1. FETCH RESET
VECTOR OR
2. SERVICE
INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
RESET
OR HVR OR LVR ^N
Y
IRQ
PORT A OR C
N
HVI, LVI
Y
16B TIMER,
CORE TIMER
N
IYNTERRUPT
Y
RESTART
PROCESSOR
CLOCK
1. FETCH RESET
VECTOR OR
2. SERVICE
INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
Figure 6-2 STOP and WAIT Flowcharts
6.6 WAIT Mode
The WAIT instruction places the MCU in a low-power consumption
mode. All CPU action is suspended, but the core timer, the 16-bit timer
(controlled by TOFF bit) and the PWM will or can remain active. An
interrupt, if enabled, from the core timer or any peripheral still active in
WAIT mode causes the MCU to exit WAIT mode.
MC68HC(8)05PV8/A — Rev. 1.9
Operating Modes
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Technical Data