Timer C Operation States; Timer F; Overview - Renesas F-ZTAT H8 Series Hardware Manual

9. Timers
9.4.4

Timer C Operation States

Table 9.10 summarizes the timer C operation states.
Table 9.10 Timer C Operation States
Operation Mode Reset Active
TCC Interval Reset Functions Functions Halted
TCC Auto Reset Functions Functions Halted
reload
TMC Reset Functions Retained
When φ
Note: /4 is selected as the internal clock of TCC in active mode or sleep mode, the
*
W
internal clock is not synchronous with the system clock, so it is synchronized by a
synchronizing circuit. This may result in a maximum error of 1/φ (s) in the count cycle.
When timer C is operated in subactive mode or subsleep mode, either an external clock
or the φ
/4 internal clock must be selected. The counter will not operate in these modes
W
if another clock is selected. If the internal φ
as the subclock φ
the least significant bit not being counted.
9.5

Timer F

9.5.1

Overview

Timer F is a 16-bit timer with an output compare function. Compare match signals can be used to
reset the counter, request an interrupt, or toggle the output. Timer F can also be used for external
event counting, and can operate as two independent 8-bit timers, timer FH and timer FL.
Features
Features of timer F are given below.
• Choice of four internal clock sources (φ/32, φ/16, φ/4, φ/2) or an external clock (can be used as
an external event counter).
• Output from pin TMOFH is toggled by one compare match signal (the initial value of the
toggle output can be set).
• Counter can be reset by the compare match signal.
• Two interrupt sources: counter overflow and compare match.
• Can operate as two independent 8-bit timers (timer FH and timer FL) in 8-bit mode.
Rev.3.00 Jul. 19, 2007 page 226 of 532
REJ09B0397-0300
Sleep
, the lower 2 bits of the counter will operate on the same cycle, with
SUB
Sub-
Watch active
Functions/
Halted*
Functions/
Halted*
Retained Functions
/4 clock is selected when φ
W
Sub-
sleep Standby
Functions/ Halted
Halted*
Functions/ Halted
Halted*
Retained Retained
/8 is being used
W