參數(shù)資料
型號(hào)： TDA5345HT
廠商： NXP SEMICONDUCTORS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 5 V spindle & VCM driver combo
中文描述： DISK DRIVE MOTOR CONTROLLER, 2 A, PQFP64
封裝： LOW PROFILE, PLASTIC, TQFP-64
文件頁數(shù)： 12/44頁
文件大?。?/td> 213K
代理商： TDA5345HT
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.
R
EGISTER
#1
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.
R
EGISTER
#2
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.
R
EGISTER
#3
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.
R
EGISTER
#4
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
1
1
1
1
0
0
0
1
1
1
0
0
1
0
1
1
1
0
0
1
0
low
low
float
high
high
float
low
high
high
float
low
low
float
high
low
low
float
high
high
float
low
low
low
high
0
1
2
3
4
5
6 (brake)
7 (tripolar)
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