Datasheet

Section 14 Timer RD
Rev. 1.50 Sep. 18, 2007 Page 308 of 584
REJ09B0240-0150
Figure 14.12 illustrates periodic count operation.
H'0000
Time
Counter cleared by GR compare match
STR
GR value
TRDCNT value
IMF
Figure 14.12 Periodic Counter Operation
(2) TRDCNT Count Timing
• Internal clock operation
A system clock (φ), four types of clocks (φ/2, φ/4, φ/8, or φ/32) that are generated by dividing
the system clock, or on-chip oscillator clock (φ40M) can be selected by bits TPSC2 to TPSC0
in TRDCR.
Figure 14.13 illustrates this timing.
TRDCNT
TRDCNT input
Internal clock
N -1 N
N+1
φ
Figure 14.13 Count Timing at Internal Clock Operation