LC78622NE
• Two-byte commands (RWC set once: Sets up the digital attenuation and the general-purpose I/O ports)
• Command noise rejection
MSB
LSB
1
Command
RES = low
1
1
1
1
1
1
0
0
1
1
1
1
1
1
COMMAND INPUT NOISE REDUCTION MODE
RESET NOISE EXCLUSION MODE
0
●
This command reduces the noise on the CQCK clock signal. While this is effective for noise pulses shorter than
500 ns, the CQCK timings tWL, tWH, and tSU, must be set for at least 1 µs.
+
–
6. CLV Servo Circuit; Pin 12: CLV , pin 13: CLV , pin 14: V/P
MSB
LSB
0
Command
RES = low
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
DISC MOTOR START (accelerate)
DISC MOTOR CLV (CLV)
1
0
DISC MOTOR BRAKE (decelerate)
DISC MOTOR STOP (stop)
1
●
+
–
The CLV pin provides the signal that accelerates the disk in the forward direction and the CLV pin provides the
signal that decelerates the disk. Commands from the control microprocessor select one of four modes; accelerate,
+
–
decelerate, CLV and stop. The table below lists the CLV and CLV outputs in each of these modes.
+
–
Mode
Accelerate
Decelerate
CLV
CLV
CLV
High
Low
Low
High
Pulse output Pulse output
Stop
Low
Low
Note: CLV servo control commands can set the TOFF pin low only in CLV mode. That pin will be at the high level
at all other times. Control of the TOFF pin by microprocessor command is only valid in CLV mode.
No. 6015-10/31
SANYO [ SANYO SEMICON DEVICE ]
