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REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
15 - 10
[B] Read motor control circuit
Fig. 15-6
This circuit controls the rotation/stoppage and the direction of rotation, excitation mode and motor
current of the read motor. The speed and direction of the motor rotation can be controlled by inputting
the drive clock signal (RMOT-CLK) and rotation direction signal (RMOT-CW). When the level of the
enabling signal (RMOT-ENB) is set to “L”, the motor current is turned to OFF regardless of the state of
other signals. One of the 2 phase excitation, 1-2 phase excitation, W1-2 phase excitation, 2W1-2 phase
excitation and 4W1-2 phase excitation can be selected by the excitation switching signal (RMOT-MD1/
RMOT-MD2). The edge switching signal (RMOT-MD3) is used to specify the switching timing for
excitation phase either from when both the rising and decay edge of the CLK input are detected or
when only the rising edge is detected. The motor current value can be set discretionary by changing the
level of the reference setting signal (RMOT-REF).