S1C63656 TECHNICAL MANUAL
EPSON
121
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Stepping Motor Driver)
4.15 Stepping Motor Driver
4.15.1 Configuration of stepping motor driver
The S1C63656 has 2 channels (Ch. 1 and Ch. 2) of stepping motor drivers allowing control of two step-
ping motors. By configuring the timing signal with software, low-power combination clocks and watches
can be implemented.
Figure 4.15.1.1 shows the configuration of the motor driver.
Pulse width
switch
Motor control
Interrupt control
Frequency
divider
Timing
generator
Ch. 1 output
control circuit
Data bus
AO2
PFTYP
PFTYP = "1": 4 kHz clock
PFTYP = "0": 512 Hz clock
Ch. 1
Ch. 2
FTRG1
FTRG1
FRUN1
Timing clock
Timing
signal
Interrupt request
FRUN1
ISMD1
EISMD1
AO1
Motor control
Interrupt control
Frequency
divider
Timing
generator
Ch. 2 output
control circuit
BO2
FTRG2
FTRG2
FRUN2
Timing clock
Timing
signal
Interrupt request
FRUN2
ISMD2
EISMD2
BO1
Fig. 4.15.1.1 Configuration of motor driver