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L7250 数据表(PDF) 33 Page - STMicroelectronics

部件名 L7250
功能描述  5V & 12V SPINDLE AND VCM MOTORS DRIVER
PDF  46 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L7250 数据表(HTML) 33 Page - STMicroelectronics

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L7250
Figure 12. VCM Bemf Offset Calibration CLEAR Routine
Set VCM in Tristate
Write Reg.03H
VCMState[2:0] = 001
START
VCM Bemf offset calibration
CLEAR Routine
Set PREADC in Sleep
Write Reg.06H
PREADC[1:0] = 00
Read 10Bit ADC
Read Reg.0BH
ADC_DATA[9:2] =00000000 (reset value)
Read Reg.0CH
ADC_DATA[1:0] =00XXXXXX (reset value)
Latch Offset Compensation
Write Reg.03H
BemfOffCal = 1
then
BemfOffCal = 0
Set ADC Clock
Write Reg.06H
PREADC[1:0] = 01
EXIT
VCM Bemf offset calibration
CLEAR Routine
OPTIONAL
Reset Rm/Rs FINE Calibration
Write Reg.02H
Rlcalib[3:0] = 0000



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