[AP1034]

016003455-E-01

- 11 -

2016/06

 DIR : Motor Rotation Direction Setting Terminal

This pin sets the direction of motor rotation. When changing the direction, a new setting is reflected on a rising

edge of the CLK pin. Refer to Figure 6.

・CCW : H-bridge2 current is output by shifting 90deree ahead against the H-bridge1 current.

・CW : H-bridge2 current is output by shifting 90degree behind against the H-bridge1 current.

Table 6.

Settings of rotate direction of motor

DIR

Condition

L

CCW (Reverse)

H

CW (Forward)

 RESETB : Home Position Setting Terminal

When the RESETB input is “H”, the sequencer is set at home position, and all the H-bridge outputs become off

(motor output becomes Hi-Z). In this case, STEP input is ignored until “H” is input to the RESETB terminal.

The internal circuits are in enable state. Refer to Figure 7.

Table 7.

Settings of home position terminal

RESETB

Condition

L

Output : Hi-Z (Home Position)

H

Operating mode

STEP

IOUT1

DIR

IOUT2

0%

0%

CCW

CW

CW

STEP

IOUT1

RESETB

IOUT2

0%

0%

Figure 6. DIR signal Timing Chart

(W1-2 phase)

Figure 7. RESETB signal Timing Chart

(W1-2 phase)