HD64F3670 Datasheet, PDF (172/305 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Previous clock
New clock
Count clock
TCNT
N
N+1
N+2
N+3
The change in signal level at clock switching is
assumed to be a rising edge, and TCNT
increments the count.
Figure 11-25 Internal Clock Switching and TCNT Operation
Rev. 1.0, 03/01, page 148 of 280