HD64336901G Renesas Technology, HD64336901G Datasheet - Page 200

• Manufacturer Part Number: HD64336901G
• Description: (HD64xxx Series) 16-BIT MICROCONTROLLER
• Manufacturer: Renesas Technology

12.5
12.5.1
Figure 12.14 shows the TCNT count timing when the internal clock source is selected. Figure
12.15 shows the timing when the external clock source is selected. The pulse width of the external
clock signal must be at least two system clock ( ) cycles; shorter pulses will not be counted
correctly.
Rev. 1.00, 11/03, page 172 of 376
Operation Timing
TCNT Count Timing
Internal
clock
TCNT input
clock
TCNT
External
clock
TCNT input
clock
TCNT
Figure 12.15 Count Timing for External Clock Source
Figure 12.14 Count Timing for Internal Clock Source
Rising edge
N
N
Rising edge
N+1
N+1
Rising edge
N+2
N+2