Timer B Operation States; Timer C (H8/3857 Group Only); Overview - Renesas F-ZTAT H8 Series Hardware Manual

9. Timers
9.3.4

Timer B Operation States

Table 9.7 summarizes the timer B operation states.
Table 9.7 Timer B Operation States
Operation Mode Reset
TCB Interval Reset
Auto reload Reset
TMB Reset
9.4

Timer C (H8/3857 Group Only)

9.4.1

Overview

Timer C is an 8-bit timer that increments or decrements each time a clock pulse is input. This
timer has two operation modes, interval and auto reload.
Timer C is a function of the H8/3857 Group only, and is not provided in the H8/3854 Group.
Features
The main features of timer C are given below.
• Choice of seven internal clock sources (φ/8192, φ/2048, φ/512, φ/64, φ/16, φ/4, φ
external clock (can be used to count external events).
• An interrupt is requested when the counter overflows.
• Can be switched between up- and down-counting by software or hardware.
• When φ
/4 is selected as the internal clock source, or when an external clock is selected, timer
W
C can function in subactive mode and subsleep mode.
Rev.3.00 Jul. 19, 2007 page 220 of 532
REJ09B0397-0300
Active Sleep
Functions Functions
Functions Functions
Functions Retained
Sub-
Watch active
Halted Halted
Halted Halted
Retained Retained Retained Retained
Sub-
sleep Standby
Halted Halted
Halted Halted
/4) or an
W