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EPSON
E0C6006 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Remote Controller)
The carrier generation circuit is switched to ON/OFF by the REMC register. By writing "1" to the register,
the carrier generation circuit goes ON and generates the carrier. When the register is set to "0" by writing,
the carrier generation circuit goes OFF and the carrier generation stops.
The OSC3 clock is divided to generate the carrier. Therefore, the OSC3 oscillation circuit must be ON
before starting remote output. Remote output should be done when the OSC3 oscillation has stabilized.
Note: It takes at least 5 msec from the time the OSC3 oscillation circuit goes ON until the oscillation
stabilizes. Consequently, when starting a remote output, secure 5 msec or more waiting time for
oscillation stabilization after turning the OSC3 oscillation ON.
Further, the oscillation stabilization time varies depending on the external oscillator characteristics and
conditions of use, so allow ample margin when setting the waiting time.
Figure 4.9.2.1 shows the carrier waveform.
OSC3 clock
1/8 division
1/4 duty
1/8 division
3/8 duty
1/12 division
1/3 duty
1/12 division
1/4 duty
Carrier
waveform
Fig. 4.9.2.1 Carrier waveform
The carrier generation circuit starts carrier output by writing "1" to the REMC register. When the REMC
register is set to "0", the carrier output stops.
Note: Except when outputting the remote control waveform, REMC register should be fixed at "0" to
prevent outputting unnecessary waveforms and to reduce current consumption. However at initial
reset, the REMC register is set to "1" for initializing the carrier generation circuit. The register must
not be set to "0" until after initialization (within 32 machine cycles).