HA13558AFH Hitachi, HA13558AFH Datasheet - Page 4

• Manufacturer Part Number: HA13558AFH
• Description: CD-ROM Combo Driver
• Manufacturer: Hitachi

HA13558AFH
Pin Description (cont)
Pin No.
38
40
41
44
45
46
47
48
4
Pin Name
VPS
VBST
VSPN
BESENS
NC
NC
COMM
CLKOSC
Function
DC-DC converter control block power supply
Booster output. This circuit generates a voltage about 1.5 V above that of the
VPS pin.
Spindle power supply
Spindle B-EMF input sensitivity switching pin. 12V: GND short, 5V: open
No connection
No connection
Sensorless motor startup oscillation time constant. The startup oscillation
frequency is determined by the external capacitor and resistor Ccom and
Rref.
Clock oscillator circuit. The clock oscillator frequency is determined by the
external capacitor and resistor Cclk and Rref.