Datasheet

Section 16 Timer RD
REJ09B0465-0300 Rev. 3.00 Page 547 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
Figure 16.9 illustrates periodic counter operation.
H'0000
Time
Counter cleared by GR compare match
STR
GR value
TRDCNT value
IMF
Figure 16.9 Periodic Counter Operation
(2) TRDCNT Count Timing
• Internal clock operation
A system clock (φ), or four types of clocks (φ/2, φ/4, φ/8, or φ/32) that are generated by
dividing the system clock can be selected by bits TPSC2 to TPSC0 in TRDCR.
Figure 16.10 illustrates this timing.
TRDCNT
TRDCNT input
Internal clock
N -1 N
N+1
φ
Figure 16.10 Count Timing in Internal Clock Operation