Epson S1C63666 Technical Manual page 130

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (R/f Converter)
RFRUNS: Sensor oscillation RUN/STOP control (FF91H•D0)
Starts R/f conversion for the sensor and indicates the operating (RUN/STOP) status.
When "1" is written: R/f conversion starts
When "0" is written: R/f conversion stops
When "1" is read: RUN status
When "0" is read: STOP status
When "1" is written to RFRUNS, R/f conversion for the sensor starts. The register remains at "1" during
R/f conversion and is set to "0" when R/f conversion is terminated.
When "0" is written to RFRUNS during R/f conversion, R/f conversion is paused.
At initial reset, this register is set to "0".
OVMC: Measurement counter overflow flag (FF91H•D2)
Indicates whether the measurement counter has overflown.
When "1" is read: Overflow has occurred
When "0" is read: Overflow has not occurred
When "1" is written: Flag reset
When "0" is written: No operation
If an overflow occurs while counting the oscillation of the sensor, OVMC is set to "1" and the interrupt
occurs at the same time.
This flag is reset by writing "1" or starting R/f conversion.
At initial reset, this flag is set to "0".
OVTBC: Time base counter overflow flag (FF91H•D3)
Indicates whether the time base counter has overflown.
When "1" is read: Overflow has occurred
When "0" is read: Overflow has not occurred
When "1" is written: Flag reset
When "0" is written: No operation
If an overflow occurs while counting the oscillation of the reference resistance, OVTBC is set to "1" and
the interrupt occurs at the same time.
This flag is reset by writing "1" or starting R/f conversion.
At initial reset, this flag is set to "0".
EIRFM, EIRFB: Interrupt mask registers (FFE7H•D0, D1)
Select whether to mask interrupt with the R/f converter.
When "1" is written: Enable
When "0" is written: Mask
Reading: Valid
EIRFM and EIRFB are the interrupt mask registers for the sensor oscillate completion interrupt and the
reference oscillate completion interrupt. The R/f converter interrupt is permitted when "1" is written to
EIRFM and EIRFB. When "0" is written, interrupt is masked.
At initial reset, these registers are set to "0".
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S1C63666 TECHNICAL MANUAL