NJU7384 Ver la hoja de datos (PDF) - Japan Radio Corporation

Número de pieza

componentes Descripción

Fabricante

NJU7384

Pulse Input Bipolar Stepper Motor Driver

Japan Radio Corporation  

NJU7384

s POWER SUPPLY ON/OFF TIMING

Regarding the switch-on sequence of the logic power supply VDD and the motor power supply VMM, input VDD after

VMM has risen. The recommended sequence is shown below.

ON

VDD ≤VMM

OFF

VDD ≤VMM

VMM

VDD

The RESET signal is "L" level in the range of turning ON . And Phase logic is initialized.

RESET

The STEP terminal is a negative edge active.

If STEP input terminal is no Signal. It signal level is fixed at “H “ level .

STEP

HSM/DIR

ENABLE

IA

IB

Excitation phase backup section

Phase logic initialization section

s RECOMMENDED STEP MODE CHANGEOVER (HSM)

The current flowing through the stepping motor must be controlled continuously so that a mis-step does not occur.

Also, the following precautions must be observed concerning changing of the setting of the HSM input.

(1) A mis-step does not occur during changeover from a full step to a half step

(2) Regarding changeover from a half step to a full step,

(a) A mis-step does not occur during changeover from a half step (excitation sequence 0, 2, 4, 6) to a full step.

(b) A mis-step occurs during changeover from a half step (excitation sequence 1, 3, 5, 7) to a full step.

For the above reason, it is recommended that mode changeover from a half step to a full step be carried out during

the period when the RESET input is “L” logic.

-6-

Ver.2007-08-20

Share Link: