Datasheet

Section 11 16-Bit Free-Running Timer
Rev. 4.00 Jun 06, 2006 page 293 of 1004
REJ09B0301-0400
11.3.6 Setting of Output Compare Flags A and B (OCFA, OCFB)
The output compare flags are set to 1 by an internal compare-match signal generated when the
FRC value matches the OCRA or OCRB value. This compare-match signal is generated at the last
state in which the two values match, just before FRC increments to a new value.
Accordingly, when the FRC and OCR values match, the compare-match signal is not generated
until the next period of the clock source. Figure 11.12 shows the timing of the setting of OCFA
and OCFB.
OCRA or OCRB
φ
Compare-match
signal
FRC
NN + 1
N
OCFA or OCFB
Figure 11.12 Setting of Output Compare Flag (OCFA, OCFB)