Cac Status Register (Castr) - Renesas RX100 Series User Manual

RX13T Group
10.2.5

CAC Status Register (CASTR)

Address(es): 0008 B004h
b7 b6
— —
Value after reset: 0 0
Bit Symbol
b0 FERRF
b1 MENDF
b2 OVFF
b7 to b3 —
FERRF Flag (Frequency Error Flag)
This flag indicates deviation of the clock frequency from the set value (frequency error).
[Setting condition]
 The clock frequency is outside of the setting range.
[Clearing condition]
 1 is written to the CAICR.FERRFCL bit.
MENDF Flag (Measurement End Flag)
This flag indicates the end of measurement.
[Setting condition]
 Measurement has finished.
[Clearing condition]
 1 is written to the CAICR.MENDFCL bit.
OVFF Flag (Overflow Flag)
This flag indicates that the counter has overflowed.
[Setting condition]
 The counter has overflowed.
[Clearing condition]
 1 is written to the CAICR.OVFFCL bit.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
b5 b4 b3 b2
— — — OVFF MENDF FERRF
0 0 0 0
Bit Name
Frequency Error Flag
Measurement End Flag
Overflow Flag
Reserved
10. Clock Frequency Accuracy Measurement Circuit (CAC)
b1 b0
0 0
Description
0: The clock frequency is within the range corresponding to
the settings.
1: The clock frequency has deviated beyond the range
corresponding to the settings (frequency error).
0: Measurement is in progress.
1: Measurement has ended.
0: The counter has not overflowed.
1: The counter has overflowed.
These bits are read as 0. The write value should be 0.
R/W
R
R
R
R/W
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