3069RF-ZTAT Datasheet, PDF (417/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Clear by Compare Match: Depending on the setting of the CCLR1 and CCLR0 bits in 8TCR,
8TCNT can be cleared when compare match A or B occurs, Figure 10.11 shows the timing of
this operation.
φ
Compare match signal
8TCNT
N
H'00
Figure 10.11 Timing of Clear by Compare Match
Clear by Input Capture: Depending on the setting of the CCLR1 and CCLR0 bits in 8TCR,
8TCNT can be cleared when input capture B occurs. Figure 10.12 shows the timing of this
operation.
φ
Input capture input
Input capture signal
8TCNT
N
H '00
Figure 10.12 Timing of Clear by Input Capture
10.4.3 Input Capture Signal Timing
Input capture on the rising edge, falling edge, or both edges can be selected by settings in 8TCSR.
Figure 10.13 shows the timing when the rising edge is selected.
The pulse width of the input capture input signal must be at least 1.5 system clocks when a single
edge is selected, and at least 2.5 system clocks when both edges are selected.
Rev. 5.0, 09/04, page 395 of 978