SH7730 Datasheet, PDF (605/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

(2) Auto-Reload Count Operation
Figure 18.3 shows the TCNT auto-reload operation.
Section 18 Timer Unit (TMU)
TCNT value
TCOR
TCOR value set to
TCNT during underflow
H'00000000
STR0 to STR2
UNF
Time
Figure 18.3 Auto-Reload Count Operation
(3) TCNT Count Timing
Setting the bits TPSC[1:0] in TCR allows to select one of the five internal clocks (Pφ/4, Pφ/16,
Pφ/64, Pφ/256, and Pφ/1024) that are generated by dividing the peripheral module clock. Figure
18.4 shows the timing.
Pφ
Divided clock
TCNT input clock
TCNT
N+1
N
N–1
Figure 18.4 Count Timing when Internal Clock is Operating
Rev. 1.00 Sep. 19, 2007 Page 557 of 1136
REJ09B0359-0100