Datasheet

Section 13 Timer Z
Rev.5.00 Nov. 02, 2005 Page 227 of 500
REJ09B0027-0500
In complementary PWM mode, when the counter switches from up-counter to down-counter or
vice versa, TCNT_0 and TCNT_1 overshoots or undershoots, respectively. In this case, the
conditions to set the IMFA flag in channel 0 and the UDF flag in channel 1 differ from usual
settings. Also, the transfer conditions in buffer operation differ from usual settings. Such timings
are shown in figures 13.33 and 13.34.
GR
Buffer transfer signal
Set to 1
Flag is not set
Transferred
to buffer
Not transferred
to buffer
N+1
GRA_0
TCNT
N
N-1 N-1N
N
IMFA
Figure 13.33 Timing of Overshooting
H'FFFFH'0001 H'0001H'0000H'0000
GR
UDF
TCNT
Buffer transfer signal
Set to 1
Flag is not set
Transferred
to buffer
Not transferred
to buffer
Figure 13.34 Timing of Undershooting