r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 838

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 13 8-Bit Timers (TMR)
13.5
13.5.1
Figure 13.4 shows the count timing for internal clock input. Figure 13.5 shows the count timing
for external clock signal. Note that the external clock pulse width must be at least 1.5 states for
incrementation at a single edge, and at least 2.5 states for incrementation at both edges. The
counter will not increment correctly if the pulse width is less than these values.
Rev. 1.00 Sep. 19, 2008 Page 810 of 1270
REJ09B0466-0100
φ
Internal clock
Clock input
to TCNT
TCNT
φ
External clock
input pin
Clock input
to TCNT
TCNT
Operation Timing
TCNT Incrementation Timing
Figure 13.5 Count Timing for External Clock Input
Figure 13.4 Count Timing for Internal Clock Input
N – 1
N – 1
N
N
N + 1
N + 1