Toshiba 452, 453, 350, 353 service manual Motclk, Motdir, Moten, Motref, Motrst

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Input/output signals

			Motor is rotated by setting number of pulse.
Clock input	MOTCLK	Input	* Internal circuit of the motor driver works when the first
			pulse be-comes ON and the last pulse becomes OFF.
			The direction of the motor rotation is determined by setting level of
			signal.
			“L”….Clockwise direction (as seen from the output shaft)
Set the direction	MOTDIR	Input	“H”…Counterclockwise direction (as seen from the output shaft)
of motor rotation			Note: When the MOTMD3 is “L”, do not change the rotation direc-
			tion within 6.25µs before the first pulse of the MOTCLK becomes
			ON and after the last pulse becomes OFF.
Cut OFF the drive			Excitation drive is forcibly turned ON/OFF.
output	MOTEN	Input	“H”…Normal operation (Excited)
			“L”.....Excitation drive is forcibly shut OFF (Not excited)
Voltage to set value	MOTREF	Input	Motor wire current value is set in the range of 0 to 1.7 (A)/phase
for the motor current			by applying the analog voltage 0 to 5 (V).
Set the			Set the excitation mode.
exicitation mode	MOTMD1 to 3	Input	Note:Do not change the setting within 5µs after the first pulse of
(1) to (3)			the MOTCLK becomes ON and the last pulse becomes OFF.
			Reset for the whole system
			Internal circuit of the driver is initialized by setting the motor to “L”
Reset	MOTRST	Input	level (pulse interval: 10µs or more).
			The motor drive circuit is automatically reset when the power is
			turned ON.

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