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Freescale Semiconductor
DRM079
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Freescale Semiconductor
Models:
DRM079
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Bi-Phase Bldc Motor Diagram
Fault Detection
Temperature Sensor Measurement
How to
Rtidisable
Page 4
Image 4
Revision History
Variable Speed DC Fan Control using the MC9RS08KA2, Rev. 0
4
Freescale Semiconductor
Page 3
Page 5
Page 4
Image 4
Page 3
Page 5
Contents
Variable Speed DC Fan Control using the MC9RS08KA2
Page
Variable Speed DC Fan Control using the MC9RS08KA2
Revision History
Freescale Semiconductor
Table of Contents
Freescale Semiconductor
Chapter Introduction
Introduction
Freescale’s New Generation Ultra Low Cost MCU
DC Fan Reference Design Targets
Bi-Phase Bldc Motor
Bi-Phase Bldc Motor Diagram
Freescale Semiconductor
Commutation
Chapter Motor Control
Rotor Position Control
Commutation Waveforms
Speed Control
Fault Detection
Motor Startup
Freescale Semiconductor
Chapter Implementation
Block Diagram
Hardware Resources
Control Loop
Firmware Control Loop
Temperature Sensor Measurement
= V DD⎜ RC⎟
ACMPSCACF, Acmpsc
#63, Mtimmod
Acmpsc
Temperature Conversion
Temperature Conversion Table
Freescale Semiconductor
VR1
Freescale Semiconductor
Appendix B Program Listing
Rtidisable
Mtimtclkfalling
Mtimtclkrising
Acmpoutputboth
#HIGH613NVICSTRM, Pagesel
MAPADDR6NVFTRIM, Icssc
MAPADDR6NVICSTRM, Icstrm $3FFA
#ICSDIV2, ICSC2
Kbies
Kbipe
#MTIMBUSCLKMTIMDIV256, Mtimclk
#255, Mtimmod
MAPADDR6SRS
Rts Drive coil
KBISCKBACK, Kbisc
MTIMSCTOF, Mtimsc
Kbisc
BUZZER, Ptad
#6, Mtimmod
#24, Mtimmod
#30, Mtimmod
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