Motorola M68HC08 Reference Manual page 93

DRM028 — Rev 0
MOTOROLA
Freescale Semiconductor, Inc.
ENTER
CURRENT MEASUREMENT
CURRENT CALIBRATION
WHEN PWM IS OFF
START CONDITION TEST
START CONDITION
(START SWITCH CHANGED
FROM STOP TO START OR
START AND PC MODE AND START CTRL)
EXIT
Speed input and dc-bus voltage measurements
The dc-bus voltage is measured after the start switch is turned ON.
This prevents the measurement being disturbed by the power turn
ON. Where that dc-bus voltage is not within the limits, the control flow
enters into the fault state.
Software Design
For More Information On This Product,
Go to: www.freescale.com
AND
DONE
OVER VOLTAGE
UNDER VOLTAGE
SPEED INPUT
AND
DC-BUS VOLTAGE
MEASUREMENTS
DONE
Figure 5-8. Stand-by State
Software Design
State Diagram
CURRENT IS HIGHER THAN LIMIT
ERROR IN HARDWARE
FAULT STATE
OR
Designer Reference Manual
93