LC78622E データシートの表示（PDF） - SANYO -> Panasonic

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LC78622E

Compact Disc Player DSP

SANYO -> Panasonic 

LC78622E

• Two-byte commands (RWC set once: Sets up the digital attenuation and the general-purpose I/O ports)

• Command noise rejection

MSB

LSB

11101111

11101110

Command

COMMAND INPUT NOISE REDUCTION MODE

RESET NOISE EXCLUSION MODE

RES = low

q

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

00000100

00000101

00000110

00000111

Command

DISC MOTOR START (accelerate)

DISC MOTOR CLV (CLV)

DISC MOTOR BRAKE (decelerate)

DISC MOTOR STOP (stop)

RES = low

q

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

Stop

CLV+

High

Low

Pulse output

Low

CLV–

Low

High

Pulse output

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. 5480-10/29

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