Motorola M68HC08 Reference Manual page 90

Software Design
(START SWITCH IS ON
OR PCMode AND StartCtrl
ALIGN STATE
PWM ENABLED
BACK-EMF ACQUISITION STATE
COMMUTATION + PWM ENABLED
RUNNING STATE
COMMUTATION + PWM ENABLED
MOTOR STOP IS REQUIRED
Designer Reference Manual
90
Freescale Semiconductor, Inc.
RUN CONDITION
AND PCMode = 0
AND SWITCH IS ON)
(Stop_F = 0)
ALIGN TIMEOUT EXPIRED
COMMUTATION IS LOCKED
WITH BACK-EMF FEEDBACK
(Stop_F = 1)
Figure 5-7. Application State Transitions
Software Design
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RESET
INITIALIZE
MCU
INITIALIZE
APPLICATION
STAND-BY STATE
PWM DISABLED
(START SWITCH SET OFF
OR PCMode AND CLEAR FAIL)
OVER CURRENT
IRRECOVERABLE
COMMUTATION
ERROR
OVER VOLTAGE
STOP STATE
PWM DISABLED
CLEAR FAILURE
(FAILURE = 0)
FAULT
STATE
PWM
DISABLED
DONE
DRM028 — Rev 0
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