Automatic Addition Timing; Figure 12.13 Timing Of Overflow Flag (Ovf) Setting; Figure 12.14 Ocra Automatic Addition Timing - Renesas H8S/2158 User Manual

Section 12 16-Bit Free-Running Timer (FRT)
φ
FRC
Overflow signal
OVF

Figure 12.13 Timing of Overflow Flag (OVF) Setting

12.5.9

Automatic Addition Timing

When the OCRAMS bit in TOCR is set to 1, the contents of OCRAR and OCRAF are
automatically added to OCRA alternately, and when an OCRA compare-match occurs a write to
OCRA is performed. Figure 12.14 shows the OCRA write timing.
φ
FRC
OCRA
OCRAR, OCRAF
Compare-match
signal
Rev. 3.00 Jan 25, 2006 page 306 of 872
REJ09B0286-0300
H'FFFF
N
N

Figure 12.14 OCRA Automatic Addition Timing

H'0000
A
N +1
N + A