SH7144 Datasheet, PDF (327/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

11.6 Operation Timing
11.6.1 Input/Output Timing
TCNT Count Timing: Figure 11.54 shows TCNT count timing in internal clock operation, and
figure 11.55 shows TCNT count timing in external clock operation (normal mode), and figure
11.56 shows TCNT count timing in external clock operation (phase counting mode).
Pφ
Internal clock
Falling edge
Rising edge
TCNT input
clock
TCNT
N-1
N
N+1
N+2
Figure 11.54 Count Timing in Internal Clock Operation
Pφ
External clock
Falling edge
Rising edge
Falling edge
TCNT input
clock
TCNT
N-1
N
N+1
N+2
Figure 11.55 Count Timing in External Clock Operation
Pφ
External
clock
TCNT input
clock
Falling edge
Rising edge
Falling edge
TCNT
N-1
N
N+1
Figure 11.56 Count Timing in External Clock Operation (Phase Counting Mode)
Rev. 2.0, 09/02, page 287 of 732