Datasheet

Table Of Contents
Section 11 8-Bit Timers (TMR)
REJ09B0140-0900 Rev. 9.00 Page 359 of 846
Sep 16, 2010
H8S/2215 Group
11.5.4 Timing of Compare Match Clear
The timer counter is cleared when compare match A or B occurs, depending on the setting of the
CCLR1 and CCLR0 bits in TCR. Figure 11.7 shows the timing of this operation.
φ
N H'00
Compare match
signal
TCNT
Figure 11.7 Timing of Compare Match Clear
11.5.5 Timing of TCNT External Reset
TCNT is cleared at the rising edge of an external reset input, depending on the settings of the
CCLR1 and CCLR0 bits in TCR. The clear pulse width must be at least 1.5 states. Figure 11.8
shows the timing of this operation.
φ
Clear signal
External reset
input pin
TCNT N H'00N – 1
Figure 11.8 Timing of Clearance by External Reset