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L6269 Datasheet(PDF) 14 Page - STMicroelectronics

Part # L6269
Description  12V DISK DRIVE SPINDLE & VCM, POWER & CONTROL "COMBO?
PDF  17 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6269 Datasheet(HTML) 14 Page - STMicroelectronics

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INTERNAL REGISTER DEFINITION
Reg:
Name:
Type:
Address:
10
Test Control Register
Write only
AEh
BIT
LABEL
DESCRIPTION
0
Unused. Set = 0
1
Unused. Set = 0
2
Unused. Set = 0
3
Unused. Set = 0
4
FLL_OUT
1 = Spindle Mech/Elec (see bit 5 register 2) output, 0 = Spindle
zero crossing output.
5
REV_BRAKE
Spindle Reverse Brake command. 1 = Brake. “0” has to be
reinserted to enable the spindle start up.
6
Unused. Set = 0
7
VB/DIS
1 = Disable Vboost
Reg:
Name:
Type:
Address:
11
VCM Control Register
Write only
BEh
BIT
LABEL
DESCRIPTION
0
VCMS
VCM PSM (chopping) Slew Rate. 0 = 10V/
µs, 1 = 20V/µs
1
VCMH
1 = Forces VCM outputs to be High in PSM mode.
2
SLEEP
Unused (for future power saving mode).
3
COMSLEW
Spindle PWM (phase commutation) Slew Rate. 0 = 30V
µs, 1 =
2V
µs.
4
Unused. Set = 0
5
Unused. Set = 0
6
Unused. Set = 0
7
Unused. Set = 0
L6269
14/17



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