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16 R/F COnVeRTeR
RFRunS: Sensor oscillation Run control/status (FF61h•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: No operation
When "1" is read: RUN status
When "0" is read: STOP status
Writing "1" to RFRUNS starts an R/F conversion for the sensor. The register is held at "1" while the R/F conver-
sion is being processed and is set to "0" when the R/F conversion has completed. Writing "0" during an R/F con-
version stops the CR oscillation. When the channel 1 sensor type (AC bias and DC bias) is changed by ERF[1:0]
during sensor oscillation, RFRUNS is not reset. In this case, reset RFRUNS by writing "0." If RFRUNS and
RFRUNR are set to "1" simultaneously, RFRUNR is effective. At initial reset, this register is set to "0."
RFRunR: Reference oscillation Run control/status (FF61h•D1)
Starts R/F conversion for the reference resistance and indicates the operating (RUN/STOP) status.
When "1" is written: R/F conversion starts
When "0" is written: No operation
When "1" is read: RUN status
When "0" is read: STOP status
Writing "1" to RFRUNR starts an R/F conversion for the reference resistance. The register is held at "1" while
the R/F conversion is being processed and is set to "0" when the R/F conversion has completed. Writing "0"
during an R/F conversion stops the CR oscillation. When the channel 1 sensor type (AC bias and DC bias) is
changed by ERF[1:0] during reference oscillation, RFRUNR is not reset. In this case, reset RFRUNR by writing
"0." RFRUNR is reset when the channel for R/F conversion is changed. If RFRUNS and RFRUNR are set to "1"
simultaneously, RFRUNR is effective. At initial reset, this register is set to "0."
OVMC: Measurement counter overflow flag (FF61h•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 an error interrupt oc-
curs 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."
OVTC: Time base counter overflow flag (FF61h•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, OVTC is set to "1" and an error
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."
16-10
Seiko epson Corporation
S1C63003/004/008/016 TeChniCal Manual
(Rev. 1.1)
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