SH7709S Datasheet, PDF (446/807 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

Auto-Reload Count Operation: Figure 12.3 shows the TCNT auto-reload operation.
TCNT value
TCOR
TCOR value set to
TCNT during underflow
H'00000000
STR0−STR2
UNF
Time
Figure 12.3 Auto-Reload Count Operation
TCNT Count Timing:
• Internal Clock Operation: Set the TPSC2–TPSC0 bits in TCR to select whether peripheral
module clock Pφ or one of the four internal clocks created by dividing it is used (Pφ/4, Pφ/16,
Pφ/64, Pφ/256). Figure 12.4 shows the timing.
Pφ
Internal
clock
TCNT
input clock
TCNT _{N + 1}
N
N−1
Figure 12.4 Count Timing when Operating on Internal Clock
Rev. 5.00, 09/03, page 402 of 760