HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 732

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 8-Bit Timers (TMR)
13.5
13.5.1
Figure 13.3 shows the count timing for internal clock input. Figure 13.4 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.7.00 Mar. 18, 2009 page 664 of 1136
REJ09B0109-0700
φ
Internal clock
Clock input
to TCNT
TCNT
φ
External clock
input pin
Clock input
to TCNT
TCNT
Operation Timing
TCNT Incrementation Timing
Figure 13.4 Count Timing for External Clock Input
Figure 13.3 Count Timing for Internal Clock Input
N – 1
N – 1
N
N
N + 1
N + 1