Test Procedure for the STK682-010GEVB Evaluation Board Evaluation Board Setup [Supply Voltage] VM (10 to 30V): Power Supply for Step motor VCC (5V) : Power Supply for internal logic IC [Operation Guide] 1. Motor Connection: Connect the stepping motor to A, AB, B and BB. 2. Initial Condition Setting: Set “ON or OFF” M1 to M3 depend on step mode, and set ENABL”H” set FDT:Slow→to 3.5v,MIX→1.1V to 3.1V or OPEN,FAST→to 0.8V set “ON or OFF” CC/CCW, and set low CLK. 3. Power Supply: At first, supply DC voltage to VCC, and VREF. Next, supply DC voltage to VM. 4. Ready for Operation from Standby State: Turn “OFF” the slide switch ENABLE. 5. Motor Operation: Input the CLK signal into the terminal CLK. 1/22/2013 1 www.onsemi.com