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REV.-A
● 4-phase Stepper Motor Drive IC (IC2A: STK6722HZ)
g~
The 4-phase stepper motor drive IC directly drives the carriage motor, under control of the gate arrays
(IC3A: E05A15HA and IC7A: E05A16GA). Figure 2-36 shows the carriage motor drive circuit block
diagram.
GA(E05A15HA)
STK6722
(3A)
CRA
CRB
CRC
CRD
F
GA(E05A 16GA)
(7A)
PD 1
Pco
Pc
1
F
(2A)
1A
OA
IB
Ic
OB
ID
Oc
PD
OD
Vref
CCD
CAB
1
I
. .,
+
t
-.
Figure 2-36. Carriage Motor Drive Circuit Block Diagram
2-44