r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 830

• Manufacturer Part Number: r4f2456
• 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 800 of 1342
REJ09B0467-0100
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