Motorola M68HC08 Reference Manual page 78

Software Design
A/D CONVERTERS
TIMER 1
PROCESS
SPEED INPUT, DC-BUS VOLTAGE
AND DC-BUS CURRENT MEASUREMENT
VOLTAGE CURRENT
PROCESS
FAULT CONTROL
FAULT STOP
Volt_Max_Fault
5.3.4 Process Fault Control Fault Stop
5.3.5 Process Back, EMF Zero Crossing Sensing
Designer Reference Manual
78
Freescale Semiconductor, Inc.
PCM COMMAND
PC Mode
Sp_Input
Curr_Max_Fault FFLAG1
Figure 5-1. Main Data Flow — Part1
The process provides fault control and fault stop as described in
State, Stand-By, Align
Running State.
The processes alignment, starting, and running control are displayed in
Figure 5-2. The processes are described in the following subsections.
Back-EMF zero crossing process provides:
• Back-EMF zero crossing sampling in synchronization with PWM,
Software Design
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PC MASTER SOFTWARE
Switch_Start
Start Ctrl
START/STOP SWITCH READING
AND START/STOP DECISION
Stop_F
PROCESS
ALIGNMENT, STARTING, RUNNING
CONTROL
FFLAG2
State, 5.5.5 Back-EMF Acquisition
Running
START/STOP
SWITCH
Fault
State, and
DRM028 — Rev 0
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