HA13558AFH Hitachi, HA13558AFH Datasheet - Page 7

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

Timing Chart
1. Start-up of Spindle
Note: 1. An auto-restart circuit is included to prevent spindle start-up failures.
PHASE
COMM
CE
Iw
Iu
Iv
2. At spindle start-up time, set the VCTL-REF voltage difference to 1 volt or greater.
0
+
0
–
+
0
–
+
0
–
0
0
Tc
B-EMF detection mask period
Synchronous operating mode
HA13558AFH
Reverse start-up
operating mode
Vth1
Vth2
7