L6269 データシートの表示（PDF） - STMicroelectronics
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L6269 Datasheet PDF : 17 Pages
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L6269
INTERNAL REGISTER DEFINITION
VCM DAC (High and Low) Registers
Bit 0 through 5 of the VCM DAC (High) Registers and bit 0 through 7 of the VCM DAC (Low) Registers
control the absolute value of the voice coil current. Bit is the sign bit, controlling the current direction. All
the 13 bits are part of a resistor divider network.
Note. It is required to write on register 1 to make effective changes on register 0.
Reg:
Name:
Type:
Address:
1
VCM DAC (Low) Registers
Write only
1Eh
BIT
0
1
2
3
4
5
6
7
LABEL
VDAC BIT0
VDAC BIT1
VDAC BIT2
VDAC BIT3
VDAC BIT4
VDAC BIT5
VDAC BIT6
VDAC BIT7
DESCRIPTION
LSB resistor ladder of the 14 bit VCM DAC
VCM DAC bit 1
VCM DAC bit2
VCM DAC bit3
VCM DAC bit4
VCM DAC bit5
VCM DAC bit6
VCM DAC bit7
Reg:
Name:
Type:
Address:
2
Spindle Control Register
Write only
2Eh
BIT
0
1
2
3
4
5
6
7
LABEL
INCRE_SEQ
START_UP
R_SEQ
RUN
SPIN_EN
MEC/ELEC
PWM/LINEAR
EXT/INT
DESCRIPTION
A 0 to 1 transition of this bit increments the spindle Sequencer.
1 = Spindle Internal start up, 0 = Spindle External start up
Reset Spindle sequencer. 1 = Reset sequencer to phase 1.
1 = Start Spindle ALIGN & GO, 0 = Reset Spindle control logic.
Enable Spindle section. 1 = Enable, 0 = Disable.
Specifies electrical or mechanical cycle for Spindle FLL control.
1=Electrical, 0 = Mechanical.
Selects Spindle PWM or Linear Output Current Control. 1 = PWM,
0=Linear.
External or internal Spindle loop feedback. 1 = external feedback
via index pin.
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