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L7200 Datenblatt(PDF) 12 Page - STMicroelectronics

Teilenummer L7200
Bauteilbeschribung  MOZART, 12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL "COMBO?
PDF  23 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7200 Datenblatt(HTML) 12 Page - STMicroelectronics

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L7200
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Reg:
1
Name:
Spindle Set-Up 0 Register
Type:
Write only
Address: 1Eh
BIT
LABEL
DESCRIPTION
0
SMOOTH
“0” Spindle SMOOTHDRIVE™. “1” Spindle Six step drive.
1
BIPMASK
Spindle Mask Time. “0” 15
°. “1” 7.5°. (Only in six step drive).
2
MINON 0
Minimum ON time in Current
Bit 3
Bit 2
Min TON
limit. First Bit.
0
0
6
µS
3
MINON 1
Minimum ON time in Current
0
1
3
µS
limit. Second Bit.
1
0
9
µS
11
7.6
µS
4
BIPDELAY
Spindle Commutation Delay. “0” 30
°. “1” 15°. (Only in six step drive).
5
MASKSPIN 0
Spindle Mask at acceleration.
Bit 6
Bit 5
Mask
First Bit.
0
0
3.2mS
6
MASKSPIN 1
Spindle Mask at acceleration.
0
1
1.6mS
Second Bit.
1
0
0.8mS
1
1
6.4mS
7
FREEZE
“0” Torque Optimizer Activated. “1” Torque Optimizer Frozen.
Reg:
2
Name:
Spindle Set-Up 1 Register
Type:
Write only
Address: 2Eh
BIT
LABEL
DESCRIPTION
0
IL0
Current Limit and Inductive
Bit 1
Bit 0
Vlimit
Sense thresholds. First Bit.
0
0
0.45V
1
IL1
Current Limit and Inductive
0
1
0.50V
Sense thresholds. Second Bit.
1
0
0.55V
1
1
0.75V
2
SSLEW
Spindle Chopping Slew Rate. “0” 10V/
µS. “1” 20V/µS.
3
FLLEXT
Spindle Speed control loop. “0” Internal. “1” External.
INTERNAL REGISTERS DEFINITION (continued)



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