HD64F3337YCP16V Datasheet, PDF (208/749 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

External Clock: If external clock input is selected, FRC increments on the rising edge of the
FTCI clock signal. Figure 8.5 shows the increment timing.
The pulse width of the external clock signal must be at least 1.5 system clock (ø) periods. The
counter will not increment correctly if the pulse width is shorter than 1.5 system clock periods.
ø
FTCI
FRC clock
pulse
FRC
N
N+1
Figure 8.5 Increment Timing for External Clock Source
176