SH7727 Datasheet, PDF (527/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

15.5 Usage Notes
Section 15 Timer (TMU)
15.5.1 Writing to Registers
Synchronous processing is not performed for timer count operation during register writes. When
writing to registers, always clear the start bits (STR2 to STR0) for the desired channel in the timer
start register (TSTR) to halt timer counting.
15.5.2 Reading Registers
Synchronous processing is performed for timer count operation during register reads. When timer
counting and register read processing are performed simultaneously, the register value prior to the
TCNT decrementation is read with the synchronous processing.
Rev. 5.00 Dec 12, 2005 page 455 of 1034
REJ09B0254-0500