8

SANKEN ELECTRIC CO., LTD.

Unipolar 2-Phase Microstepping Motor Driver IC

SI-7321M

28210.05

All illustrations in this section are based on step sequencing using the POS edge option. When the POS/NEG edge option is used, step sequences occur

at both the rising edge and the falling edge of the Clock pulse.

Full step

M1: Low, M2: Low, M3: Low (Current ratio mode 8)

M1: High, M2: Low, M3: Low (Current ratio mode F)

Step Sequencing

A

B

B

A

0

12

100

0

…

RESET

CLO C K

CW

CCW

A

B

B

A

0

1

2

70.7

0

…

RESET

CLO C K

CW

CCW