HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 331

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

9.5.3
When an internal clock is selected with the CKS1 and CKS0 bits of the CMCSR register and the
STR bit of the CMSTR is set to 1, the CMCNT begins incrementing with the selected clock. When
the CMCNT counter value matches that of the CMCOR, the CMCNT counter is cleared to H'0000
and the CMF flag of the CMCSR register is set to 1. The CMCNT counter begins counting up
again from H'0000.
Figure 9.27 shows the compare match counter operation.
One of four clocks (P /4, P /8, P /16, P /64) obtained by dividing the the system clock (P ) can
be selected by the CKS1 and CKS0 bits of the CMCSR. Figure 9.28 shows the timing.
Period Count Operation
CMCNT Count Timing
CMCNT0 input
Internal clock
CMCNT0
Operation
clock
CK
CMCOR
CMCNT value
H'0000
N-1
Figure 9.27 Counter Operation
Figure 9.28 Count Timing
N
Counter cleared by
CMCOR compare match
Rev. 4.00, 03/04, page 285 of 660
Time
N+1