Motorola M68HC08 - Manual (Page 80)

Software Design
Designer Reference Manual DRM028 — Rev 0
80 Software Design MOTOROLA
Figure 5-2. Main Data Flow — Part 2: Alignment, Starting,
Running Control
Sp_Input
V_TASC2 V_MUX
T_ZCros
Speed_Desired
T_CMT
T2 Per_ZCrosFlt
PC_F
Per_Speed_MAX_Range
T_Cmt PC_F
V_TASC2
TIMER 2
PWM MODULE
TIMER1
VIRTUAL
BACK-EMF
ICR_F FOK_F
Curr_Align Curr
Coef_Speed_Inp Speed_Min_U8
PIParamsScl_S8_Curr
PIParamsScl_U8_Speed
COMMUTATION HAS BEEN
PROCESS
DESIRED SPEED SETTING
PROCESS
BACK-EMF
ZERO CROSSING SENSING
CORRECTIVE CALCULATION 1
OF COMMUTATION PARAMTERS
CORRECTIVE CALCULATION 2
OF COMMUTATION PARAMETERS
(ACCELERATION)
PROCESS
COMUTATION TIMES
CALCULATION
PROCESS
SPEED CONTROL
PROCESS
PRESET COMMUTATION
AND ZERO CROSSING
PROCESS
ALIGNMENT CONTROL
PROCESS
SET COMMUTATION AND
ZERO CROSSING SELECTION
*Only when regular
feedback can not
be used
PERFORMED — FLAG
TIMER 3
INIT
TIMER2
TIMEOUT,
ACTUAL TIME
ZERO CROSSING
MULTIPLEXER
TIMER 2
ACTUAL TIME
BACK-EMF
ZERO CROSSING
INPUT
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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