Stepper Clock and Stepper Direction Signals

Table 2-6:     Stepper Clock and Stepper Direction Signal Output Specifications

Specification	Value
Output Voltage	5V TTL
Maximum Output Frequency	25 MHz
Maximum Source / Sink Current	±20 mA
Clock Default State	Logic Low (0 V)
Direction Default State	Logic Low (0 V)
Maximum Clock Pulse Width	25 µs
Minimum Clock Pulse Width	20 ns

To change the direction of the rotation of the motor, reverse the polarity of one of the phases. Reverse the A and A-N or B and B-N wires at the stepper motor driver.

Table 2-7:     Stepper Direction Signal Output Polarity

Specification	Value
Negative / CCW Direction	Logic Low (0 V)
Positive / CW Direction	Logic High (+5 V)

Figure 2-2:     Stepper Clock and Stepper Direction Timing

Figure 2-3:     Stepper Clock and Stepper Direction Output Schematic