1999 June 10

12

Philips Semiconductors

Preliminary specification

5 V spindle & VCM driver combo

TDA5345HT

Table 3

Spindle power output states according to ManCom0, ManCom1, ManCom2 bit values.

bit [11, 8] (StartUp[3, 0]): programmable delay used to detect if the spindle is standing still at start-up.

bit [7, 4] (ComDeLim[3, 0]): Used to set a default value for the spindle commutation delay.

bit [3, 0] (WatchDog[3; 0]): programmable delay used to detect if the spindle is running backward at star-up.

bit [11, 8] (BlankDelay[3, 0]): programmable delay used to blank the first edge of the spindle inductive fly-backs.

bit 7 (DigOutMux): SpinDigOut pin is the commutation clock when DigOutMux = ‘1’ else back-EMF comparator output.

bit [6, 4] (BdGapAdj[2, 0]): used to adjust the internal BandGap reference voltage to improve several parameters.

bit 3 (VcmRetSoftRising): Enables the digital soft rising slope on the “full power retract” step.

bit [2, 0] (Vretract[2; 0]): used to program the VcmMinus output voltage during the “soft retract” step.

bit [11, 9] (T_FullPower[2, 0]): used to program how much time the full power retract step is applied.

bit [8, 3] (T_SlowRetract[5, 0]): used to program how much time the slow retract step is applied.

bit [2, 0] (T_VcmBrake[2, 0]): used to program how much time the VCM brake step is applied.

bit [11, 10] (FlyBackSlope[1, 0]): used to program the fly-back pulse leading edge slew rate.

bit [9, 8] (ShockThresh[1, 0]): set the shock sensor threshold value.

bit 7 (VcmRetract): activates a VCM retract when VcmRetract = ‘1’.

bit 6 (VcmSleep): puts the VCM section (except the VCM sense amplifier and the VCM 12-bit DAC) in sleep mode when

VcmSleep = ‘1’.

bit 5 (DAC12Sleep): puts the VCM 12-bit DAC & the VCM sense amplifier in sleep mode when Dac12Sleep = ‘1’.

bit 4 (RegNegSleep): puts the -3 V regulator in sleep mode when RegNegSleep = ‘1’.

bit 3 (ShockSleep): puts the Shock sensor section in sleep mode when ShockSleep = ‘1’.

bit 2 (SpinSleep): puts the Spindle section in sleep mode when SpinSleep = ‘1’ ; SpinMotA, B, C are floating then.

bit 1 (Reg3v3Enable): Enables the internal 3.3 V regulator when bit 1= ‘1’.

MANCOM[2]

MANCOM[1]

MANCOM[0]

SPINMOT A

SPINMOT B

SPINMOT C

STATE CODE

0

0

0

low

high

float

0

0

0

1

low

float

high

1

0

1

1

float

low

high

2

1

1

1

high

low

float

3

1

1

0

high

float

low

4

1

0

0

float

high

low

5

1

0

1

low

low

low

6 (brake)

0

1

0

high

low

high

7 (tripolar)