20-8
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
20.5.
Interrupts
The RFC has a function to generate the interrupts shown in Table 20.5.1.
Table 20.5.1 RFC Interrupt Function
Interrupt
Interrupt flag
Set condition
Clear
condition
Reference oscillation
completion
RFC_
n
INTF.EREFIF
When reference oscillation has been completed
normally due to a measurement counter overflow
Writing 1
Sensor A oscillation
completion
RFC_
n
INTF.ESENAIF
When sensor A oscillation has been completed
normally due to the time base counter reaching
0x000000
Writing 1
Sensor B oscillation
completion
RFC_
n
INTF.ESENBIF
When sensor B oscillation has been completed
normally due to the time base counter reaching
0x000000
Writing 1
Measurement
counter overflow
error
RFC_
n
INTF.OVMCIF
When sensor oscillation has been terminated
abnormally due to a measurement counter overflow
Writing 1
Time base counter
overflow error
RFC_
n
INTF.OVTCIF
When reference oscillation has been terminated
abnormally due to a time base counter overflow
Writing 1
The RFC provides interrupt enable bits corresponding to each interrupt flag. An interrupt request is sent
to the CPU core only when the interrupt flag, of which interrupt has been enabled by the interrupt
enable bit, is set. For more information on interrupt control, refer to the
“Interrupt” chapte
r.
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