SH7727 Datasheet, PDF (524/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 15 Timer (TMU)
Auto-Reload Count Operation: Figure 15.3 shows the TCNT auto-reload operation.
TCNT value
TCOR
TCOR value set to
TCNT during underflow
H'00000000
Time
STR0 to STR2
UNF
Figure 15.3 Auto-Reload Counter Operation
TCNT Count Timing:
• Internal Clock Operation
Select one of the four internal clocks (Pφ/4, Pφ/16, Pφ/64, Pφ/256), which are divided from the
peripheral clock Pφ, with the TPSC2 to TPSC0 bits in TCR. Figure 15.4 shows the timing.
Pφ
Divided
clock
TCNT
input clock
TCNT _{N + 1}
N
N−1
Figure 15.4 Count Timing when Internal Clock is Operating
Rev. 5.00 Dec 12, 2005 page 452 of 1034
REJ09B0254-0500