mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 307
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mc9s12hz256v2
Manufacturer Part Number
mc9s12hz256v2
Description
Hcs12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12HZ256V2.pdf
(692 pages)
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Freescale Semiconductor
No
Advance Pointer
Start Integration
Start Blanking
Initialize SSD
Disable SSD
Integration?
Detection?
Blanking?
End of
End of
Stall
Yes
Yes
Yes
No
No
Figure 10-15. Return-to-Zero Flowchart
MC9S12HZ256 Data Sheet, Rev. 2.05
Using Motor Control module, drive pointer to within 3 full steps of
calibrated zero position.
1. Clear (or set) RCIR; clear (or set) POL; clear (or set) SMS;
2. Set MCZIE; clear MODMC; clear (or set) PRE; set MCEN.
3. Set RTZE; set SDCPU; write ACLKS (select sample frequency).
4. Store threshold value in RAM.
1. Clear MCZIF.
2. Write MDCCNT with blanking time value.
3. Clear ITG; clear (or set) DCOIL; increment (or decrement) STEP for
CCW (or CW) motion.
MDCCNT = 0x0000? or MCZIF = 1?
1. Clear MCZIF.
2. Write MDCCNT with integration time value.
3. Set ITG; set DCOIL.
MDCCNT = 0x0000? or MCZIF = 1?
ITGACC < Threshold (RAM value)?
1. Clear MCZIF.
2. Clear MCEN.
3. Clear ITG.
4. Clear RTZE; clear SDCPU.
Chapter 10 Stepper Stall Detector (SSDV1)
307
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