e-STUDIO520/600/720/850 EXIT/REVERSE SECTION March 2005 © TOSHIBA TEC
15 - 10
15.6 Reverse motor control circuit
The reverse motor is a stepping motor driven by the control signal output from the PFC CPU on the
LGC board and rotates the reverse motor-1 and -2.
The reverse motor is driven by the pulse signal (MTMA-0, MTMB-0, MTMAB-0, MTMBB-0) output from
the driver IC. These pulse signals are formed based on the reference clock signal (REVMC-0) and out-
put only when the enable signal (REVME-0) is L level. Also, the rotation speed or direction of the motor
can be switched by changing the output timing of each pulse signal. The rotation direction can be
switched by the motor rotation direction switch signal (REVCW-0).
Fig.15-7
Reverse motor drive signal
Signal
Motor status
REVMC-0 REVME-0 RVMVR-0 REVCW-0
Pulse signal L L L Forward rotation when accelerating/
decelerating
L L H Reverse rotation when accelerating/
decelerating
L H L Forward rotation at a constant speed
L H H Reverse rotation at a constant speed
- H - - Stop
MOT2-RV board
IC57
PFC CPU
REVCW-0
REVMC-0
Reverse motor
REVME-0
RVMVR-0
MTMB-0
MTMA-0
MTMBB-0
MTMAB-0
IC103
Buffer
Q63
IC1
Motor driver
LGC board
+5VSW
SG
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