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PIN DESCRIPTION

Pin

Function

Description

1

GND1

Return path for the logic signals and 5V supply.

2

Sync

Chopper oscillator output.

Several modules can be synchronized by connecting together all Sync pins. This pin can

be used as the input for an external clock source.

3

Reset

Asynchronous reset input. An active low pulse on this input preset the internal logic to the

initial state (ABCD=0101).

4

Half/Full

Half/Full step selection input.

When high or unconnected the half step operation is selected.

5

Home

When high, this output indicates that the internal counter is in its initial state (ABCD=0101).

This signal may be used in conjunction with a mechanical switch to ground or with open

collector output of an optical detector to be used as a system home detector.

6

Stepclk

The motor is moved one step on the rising edge of this signal.

7

CW/CCW

Direction control input. When high or unconnected clockwise rotation is selected. Physical

direction of motor rotation depends also on windings connection.

8

Oscillator

The chopper oscillator timing, internally fixed at 17kHz, can be modified by connecting a

resistor between this pin and Vss or a capacitor between this pin and Gnd1.

The oscillator input must be grounded when the unit is externally synchronized.

9

Ioset

Phase current setting input. A resistor connected between this pin and Gnd1 or Vss,

allows the factory setted phase current value (1A for GS-D200 and 2A for GS-D200S) to

be changed.

10

Control

Logic input that allows the phase current decay mode selection. When high or

unconnected the slow decay is selected.

11

Enable

Module enable input. When low this input floats the outputs enabling the manual

positioning of the motor. Must be LOW during power-up and down sequence, HIGH during

normal operation.

12

Vss

5V supply input. Maximum voltage must not exceed 7V.

13

GND2

Return path for the power section.

14

D

D output.

15

C

C output.

16

B

B output.

17

A

A output.

18

Vs

Module and motor supply voltage.

Maximum voltage must not exceed the specified values.

GS-D200/GS-D200S