HD6417706 Datasheet, PDF (366/709 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 to STR2
UNF
Time
Figure 12.3 Auto-Reload Count Operation
• TCNT count timing
1. Internal Clock Operation: Set the TPSC2 to 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
Timer counter
input clock
TCNT
N+1
N
N–1
Figure 12.4 Count Timing when Internal Clock Is Operating
Rev. 4.00, 03/04, page 320 of 660