SH7720 Datasheet, PDF (572/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 14 Timer Unit (TMU)
14.5 Usage Notes
14.5.1 Writing to Registers
Synchronization processing is not performed for timer counting during register writes. When
writing to registers, always clear the appropriate start bits for the channel (STR2 to STR0) in the
timer start register (TSTR) to halt timer counting.
14.5.2 Reading Registers
Synchronization processing is performed for timer counting during register reads. When timer
counting and register read processing are performed simultaneously, the register value before
TCNT counting down with synchronization processing is read.
Rev. 3.00 Jan. 18, 2008 Page 510 of 1458
REJ09B0033-0300