HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 323

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

12.5
12.5.1
Figure 12.4 shows the TCNT count timing with an internal clock source. Figure 12.5 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 (ø) for a single edge and at least 2.5 system clocks (ø) for both
edges. The counter will not increment correctly if the pulse width is less than these values.
Ø
Internal clock
TCNT input
clock
TCNT
Ø
External clock
input pin
TCNT input
clock
TCNT
Operation Timing
TCNT Count Timing
Figure 12.5 Count Timing for External Clock Input (Both Edges)
Figure 12.4 Count Timing for Internal Clock Input
N – 1
N – 1
N
N
Rev. 2.0, 08/02, page 283 of 788
N + 1
N + 1