HA13566AF Datasheet, PDF (5/20 Pages) Hitachi Semiconductor – Combo (Spindle & VCM) Driver

HA13566AF
Mode Control Register (A0 = 1)
Bit
Symbol
1
0
Note
MD0
SPNENAB
Spindle enable
Spindle disable
1
MD1
BRAKE
Brake enable
Brake disable
1
MD2
Not use
—
—
MD3
HALF
Half wave drive
Full wave drive
MD4
EXTCOM
External commutation Internal commutation 2
MD5
SOFTSW
Soft switching
Switching
MD6
VCMENAB
VCM enable
VCM disable
MD7
RETRACT
Retracting
Not retracting
MD8
POLESEL
for 12 poles motor
for 8 poles motor
3
MD9
FBOOST
Low frequency
High frequency
4
Notes: 1. The spindle motor is independently winding to the value of the MD2, during the MD1 is true.
2. The bit MD4 select a commutation mode at driving by B-EMF sensing. (See Commutation
timing)
3. In order to prevent the misdetection of back-EMF amplifier, the bit MD8 should be chosen as
shown above table.
4. The bit MD9 determine the operating frequency of Booster Circuit. According to the frequency of
Input CLK at pin 10, the value of MD9 should be chosen as shown below.
CLK (at pin 10)
MD9
7.1 MHz to 10 MHz
0
4.0 MHz to 7.0 MHz
1
Input Data Register (A0 = 0)
Bit / DD0 to DD9: These input data are used to control the output current at VCM driver as shown follows.
MSB
LSB
DD9 DD8 DD7 DD6 DD5 DD4 DD3 DD2 DD1 DD0
VCMGAIN
Input data of DAC
Figure 3 Input Data (2)
5