EDE1204 Datasheet, PDF (1/7 Pages) List of Unclassifed Manufacturers – Bi-Polar Stepper Motor IC

EDE1204 Bi-Polar Stepper Motor IC
Coil B Control Signal 1
Coil B Control Signal 2
Connect to +5V DC 3
Connect to +5V DC 4
Digital Ground 5
0 = Disable Motor Drivers 6
1 = Clockwise, 0 = Counter-Clockwise 7
1 = Normal Stepping, 0 = Half-Stepping 8
Single-Step on Falling Edge in 'STEP' mode 9
EDE1204
Coil B
Coil A
Coil B
Coil A
+5V
OSC1
+5V
OSC2
GND
+5V
Free Spin
C
Direction
B
Half-Stepping A
Step
Run
18 Coil A Control Signal
17 Coil A Control Signal
16 Oscillator Connection
15 Oscillator Connection
14 Connect to +5V DC
13 Speed Control (MSB)
12 Speed Control
11 Speed Control (LSB)
10 1 = 'STEP' mode, 0 = 'RUN' mode
The EDE1204 Bi-Polar Stepper Motor IC is a 5 volt, 18 pin package designed to control a Bi-Polar (4
wire) stepper motor. The EDE1204 is capable of self-clocking in the free-standing 'RUN' mode, as
well as external clocking in the 'STEP' mode. In addition, half-stepping and directional control are
also available. The TTL-level outputs sequence dual H-Bridges (one per coil) such as the L293 Dual
H-Bridge IC or dual H-Bridges made from discrete transistors (see schematics section). The
EDE1204 features the ability to change the stepping rate while the motor is stepping and to self-
clock an unlimited number of steps in continuous 'RUN' mode. Inputs are TTL/ CMOS compatible.
RUN mode
In the 'RUN' mode, activated by a low on pin 10, the EDE1204 will cause the motor to rotate
according to the following parameters:
Direction (pin 7): 1 = clockwise, 0 = counter-clockwise
(If a clockwise command causes counterclockwise rotation of motor, reverse the
sequence of the motor’s four phase wires.)
Half-Stepping (pin 8): 1 = normal stepping, 0 = half stepping (doubles step resolution)
Speed Control [C,B,A] (pins 13,12,11): these three active-low bits select one of eight
rotational speeds. Refer to Tables One & Two below for speed range details.
Note: Throughout this datasheet, "1" refers to +5V, and "0" refers to 0V (Ground).
© COPYRIGHT 1998 E-LAB Digital Engineering, Inc. All rights reserved. Page 1