Datasheet

Section 12 Timer Z
Rev. 4.00 Mar. 15, 2006 Page 232 of 556
REJ09B0026-0400
12.5 Interrupts
There are three kinds of timer Z interrupt sources; input capture/compare match, overflow, and
underflow. An interrupt is requested when the corresponding interrupt request flag is set to 1 while
the corresponding interrupt enable bit is set to 1.
12.5.1 Status Flag Set Timing
IMF Flag Set Timing: The IMF flag is set to 1 by the compare match signal that is generated
when the GR matches with the TCNT. The compare match signal is generated at the last state of
matching (timing to update the counter value when the GR and TCNT match). Therefore, when
the TCNT and GR matches, the compare match signal will not be generated until the TCNT input
clock is generated. Figure 12.48 shows the timing to set the IMF flag.
IMF
ITMZ
TCNT
TCNT input clock
Compare match
signal
N
N+1
GR
N
φ
Figure 12.48 IMF Flag Set Timing when Compare Match Occurs