HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 416

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

2. Auto-Reload Count Operation
STR0 to STR2
3. TCNT Count Timing
Rev. 1.00, 02/04, page 378 of 804
H'00000000
Figure 14.3 shows the TCNT auto-reload operation.
Set the TPSC1 and TPSC0 bits in TCR to select one of the four internal clocks (Pφ/4, Pφ/16,
Pφ/64, Pφ/256) that is created by dividing the peripheral module clock. Figure 14.4 shows the
timing.
input clock
TCOR
Divided
UNF
TCNT
TCNT
TCNT value
clock
Pφ
Figure 14.4 Count Timing when Internal Clock Is Operating
N + 1
Figure 14.3 Auto-Reload Count Operation
N
TCOR value set to
TCNT during underflow
N – 1
Time