r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 845

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

18.6
18.6.1
When writing to a TMU register, timer count operation must be stopped by clearing the start bit
(STR5 to STR0) for the relevant channel in TSTR.
Note that TSTR can be written to, and the UNF and ICPF bits in TCR can be cleared while the
count is in progress. When the flags (UNF and ICPF) are cleared while the count is in progress,
make sure not to change the values of bits other than those being cleared.
18.6.2
Reading from TCNT is performed synchronously with the timer count operation. Note that when
the timer count operation is performed simultaneously with reading from a register, the
synchronous processing causes the TCNT value before the count-down operation to be read as the
TCNT value.
18.6.3
Ensure that the external clock (TCLK) input frequency for channels 0, 1 and 2 does not exceed
Pck/4.
Usage Notes
Register Writes
Reading from TCNT
External Clock Frequency
Rev.1.00 Jan. 10, 2008 Page 815 of 1658
18. Timer Unit (TMU)
REJ09B0261-0100