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

• Command noise rejection

This command reduces the noise on the CQCK clock signal. While this is effective for noise pulses shorter than

signal that decelerates the disk. Commands from the microcontroller select one of four modes; accelerate, decelerate,

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 microcontroller command is only valid in CLV mode.

No. 5811-10/27

LC78624E

Code

Command

RES = low

$EF

COMMAND INPUT NOISE REDUCTION MODE

$EE

RESET THE MODE ABOVE

q

q

Code

Command

RES = low

$04

DISC MOTOR START (accelerate)

$05

DISC MOTOR CLV (CLV)

$06

DISC MOTOR BRAKE (decelerate)

$07

DISC MOTOR STOP (stop)

q

q

Mode

Accelerate

High

Low

Decelerate

Low

High

CLV

Pulse output

Pulse output

Stop

Low

Low

A09904

A09905