h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 383

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

13.5
13.5.1
Figure 13.4 shows the TCNT count timing with an internal clock source. Figure 13.5 shows the
TCNT count timing with an external clock source. The pulse width of the external clock signal
must be at least 1.5 system clocks ( ) for a single edge and at least 2.5 system clocks ( ) for both
edges. The counter will not increment correctly if the pulse width is less than these values.
Internal clock
TCNT input
clock
TCNT
External clock
input pin
TCNT input
clock
TCNT
Operation Timing
TCNT Count 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
Rev. 3.00 Jan 25, 2006 page 331 of 872
Section 13 8-Bit Timer (TMR)
REJ09B0286-0300
N + 1
N + 1