bd63847 ROHM Co. Ltd., bd63847 Datasheet - Page 5

• Manufacturer Part Number: bd63847
• Description: Micro Step 36v Stepper Motor Drivers
• Manufacturer: ROHM Co. Ltd.

●Points to notice for terminal description and PCB layout
© 2010 ROHM Co., Ltd. All rights reserved.
BD63847/63843EFV
www.rohm.com
○CLK/Clock input terminal for advancing the electrical angle
○MODE0,MODE1/Motor excitation mode setting terminal
○CW_CCW /Motor rotating direction setting terminal
○ENABLE/Output enable terminal
○PS/Power save terminal
○TEST/ Terminal for testing
CLK is reflected at rising edge. The Electrical angle advances by one for each CLK input.
Motor’s misstep will occur if noise is picked up at the CLK terminal, so please design the pattern in such a way that there
is no noise plunging.
Set the step mode.
Unrelated to CLK, change in setting is forcibly reflected (refer to P.13).
Set the motor’s rotating direction. Change in setting is reflected at the CLK rising edge immediately after the change in
setting (refer to P.12)
Turn off forcibly all the output transistors (motor output is open).
At ENABLE=L, electrical angle or operating mode is maintained even if CLK is inputted.
If step modes are changed during ENABLE=L, new step mode is carried out at ENABLE=L to H(refer to P.13).
PS can make circuit standby state and make motor output OPEN. In standby state, translator circuit is reset (initialized)
and electrical angle is initialized.
Please be careful because there is a delay of 40µs(max.) before it is returned from standby state to normal state and the
motor output becomes ACTIVE (refer to P.10).
The electrical angle (initial electrical angle) of each step mode immediately after RESET is as follows (refer to P.11).
This is the terminal used at the time of shipping test. Please connect to GND. Please be careful because there is a
possibility of malfunction if GND unconnected.
MODE0
CW_CCW
ENABLE
Step mode
H
H
L
L
1/16 step
Half step
Full step
1/8 step
PS
H
H
H
L
L
L
MODE1
Clockwise (CH2’s current is outputted with a phase lag of 90°in regard to CH1’s current)
Counter Clockwise(CH2’s current is outputted with a phase lead of 90°in regard to CH1’s current)
H
H
L
L
OPEN (electrical angle maintained)
Initial electrical angle
Standby state (RESET)
Motor output
45°
45°
45°
45°
ACTIVE
ACTIVE
State
Step mode
1/16 step
Half step
Full step
1/8 step
5/19
Rotating direction
Technical Note
2010.4 - Rev.A