Specifications

S1C62740 TECHNICAL HARDWARE EPSON I-35
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
Fig. 4.5.4
Output waveform of FOUT
By setting the register FOR00 to "1", R00 is set to FOUT (clock)
output port. When FOR00 is set to "0", R00 become the regular DC
output port.
When the FOUT output is selected, ON/OFF of the signal output
can be controlled by the R00 register.
The frequency of clock output signal may be selected from among 4
types as Table 4.5.2 by setting of the FOFQ0 and FOFQ1 registers.
• FOUT
(R00)
Table 4.5.2
FOUT clock frequency
Note: A hazard may occur when the FOUT signal is turned ON or OFF.
Figure 4.5.4 shows the output waveform of FOUT.
FOFQ1 FOFQ0 Clock frequency (Hz)
11 fOSC3
10 fOSC1
0 1 4,096
0 0 512
R00 register
FOUT output
110
• PTOVF
(R01)
By setting the register PTR01 to "1", R01 is set to PTOVF (output
pulse of the programmable timer) output port. When PTR01 is set
to "0", R01 become the regular DC output port.
When the PTOVF output is selected, ON/OFF of the signal output
can be controlled by the R01 register. However, control of the
programmable timer is necessary.
Refer to Section 4.10, "Programmable Timer" for details of the
programmable timer.
Note: A hazard may occur when the PTOVF signal is turned ON or OFF.
Figure 4.5.5 shows the output waveform of PTOVF.
R01 register
PTOVF output
110
Fig. 4.5.5
Output waveform of PTOVF