CHAPTER 2
2 - 15
COPYRIGHT ©
2000 CANON INC. CANOSCAN D660U REV.0 JULY 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
D. Drive Motor Control Circuit
When the host computer sends a command to change scaling/resolution, the ASIC generates
the control signal (A
+
, A
-
, B
+
, B
-
) and sends the signal to the drive motor via the motor driver.
When the host computer changes its command to the ASIC, the ASIC changes its control
signal to control the motor driver.
Figure 2-13
M1
Motor
driver
A
+
A-
B
+
B-
ASIC
CCD drive PCB
Main PCB
Host computer
Drive motor