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Main data flow — part1, He data flow analysis shown in, Figure 5-1 – Motorola M68HC08 User Manual

Page 78: The processes are described

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Software Design

Designer Reference Manual

DRM028 — Rev 0

78

Software Design

MOTOROLA

Figure 5-1. Main Data Flow — Part1

5.3.4 Process Fault Control Fault Stop

The process provides fault control and fault stop as described in

Fault

State

,

Stand-By

,

Align State

,

5.5.5 Back-EMF Acquisition State

, and

Running State

.

The processes alignment, starting, and running control are displayed in

Figure 5-2

. The processes are described in the following subsections.

5.3.5 Process Back, EMF Zero Crossing Sensing

Back-EMF zero crossing process provides:

Back-EMF zero crossing sampling in synchronization with PWM,

START/STOP

PC Mode

Start Ctrl

Switch_Start

Running

SWITCH

A/D CONVERTERS

Sp_Input

TIMER 1

VOLTAGE

Curr_Max_Fault

Volt_Max_Fault

CURRENT

PC MASTER SOFTWARE

Stop_F

PCM COMMAND

FFLAG1

FFLAG2

PROCESS

ALIGNMENT, STARTING, RUNNING

CONTROL

START/STOP SWITCH READING

AND START/STOP DECISION

PROCESS

SPEED INPUT, DC-BUS VOLTAGE

AND DC-BUS CURRENT MEASUREMENT

PROCESS

FAULT CONTROL

FAULT STOP

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