SH7727 Datasheet, PDF (15/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

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436 CMCNT0 Count Timing
One of four clocks (Pφ/4, Pφ/8, Pφ/16,
Pφ/64) which are divided from the clock
(Pφ) can be selected with the CKS1 and
CKS0 bits in CMCSR0. …
One of four peripheral clocks (Pφ/4, Pφ/8,
Pφ/16, Pφ/64) which are divided from the
clock (Pφ) can be selected with the CKS1
and CKS0 bits in CMCSR0. …
Figure 14.28 Count Timing
CK
Peripheral clock (Pφ)
Internal clock
CMT clock
437 Figure 14.29 Timing of CMF Setting
CK
Peripheral clock (Pφ)
Figure 14.30 Timing of CMF Clear by the
CPU
CK
Peripheral clock (Pφ)
442 14.6 Usage Notes
Item 14, 15, added
443 15.1.1 Features
• Selection of six counter input clocks for
each channel:
On-chip RTC output clock (16 kHz), Pφ/4,
Pφ/16, Pφ/64, and Pφ/256
Note: Pφ is the internal clock for peripheral
modules and can be selected as 1/4, 1/2, or
the same frequency as that of the CPU
operating clock φ.) See section 10, On-Chip
Oscillation Circuits, for more information on
the clock pulse generator.
• Selection of six counter input clocks for
each channel:
On-chip RTC output clock (16 kHz), Pφ/4,
Pφ/16, Pφ/64, and Pφ/256
Note deleted
• The maximum 2 MHz operating frequency
for the 32-bit counter in each channel:
Operate the SH7727 so that the clock input
to each channel timer counter does not
exceed the maximum operating frequency,
by dividing the external clock and internal
clock with the prescaler)
Operate the SH7727 so that the clock input
to each channel timer counter does not
exceed the maximum operating frequency,
by dividing the external clock and
peripheral clock (Pφ) with the prescaler.
Rev. 5.00 Dec 12, 2005 page xv of lxxii