h8s-2111b Renesas Electronics Corporation., h8s-2111b Datasheet - Page 204

• Manufacturer Part Number: h8s-2111b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

9.5
9.5.1
Figure 9.3 shows the FRC increment timing with an internal clock source. Figure 9.4 shows the
increment timing with an external clock source. The pulse width of the external clock signal must
be at least 1.5 system clocks (φ). The counter will not increment correctly if the pulse width is
shorter than 1.5 system clocks (φ).
Rev. 1.00, 05/04, page 170 of 544
φ
External clock
input pin
FRC input
clock
FRC
Internal clock
FRC input
clock
FRC
φ
Operation Timing
FRC Increment Timing
Figure 9.4 Increment Timing with External Clock Source
Figure 9.3 Increment Timing with Internal Clock Source
N – 1
N
N
N + 1
N + 1