Section 9 Timers; Overview - Renesas H8 Series Hardware Manual

9.1

Overview

The H8/3644 Group provides five timers: timers A, B1, V, X, and a watchdog timer. The
functions of these timers are outlined in table 9.1.
Table 9.1 Timer Functions
Name Functions
Timer A 8-bit timer
•
Interval function
•
Time base
•
Clock output
•
8-bit timer
Timer B1
•
Interval timer
•
Event counter
•
8-bit timer
Timer V
•
Event counter
•
Output control by dual
compare match
•
Counter clearing option
•
Count-up start by
external trigger input can
be specified
•
16-bit free-running timer
Timer X
•
2 output compare
channels
•
4 input capture channels
•
Counter clearing option
•
Event counter
•
Reset signal generated
Watchdog
when 8-bit counter
timer
overflows

Section 9 Timers

Internal Clock
φ/8 to φ/8192
(8 choices)
φ
/128
W
(choice of 4
overflow periods)
φ/4 to φ/32
φ /4 to φ
/32
W W
(8 choices)
φ/4 to φ/8192
(7 choices)
φ/4 to φ/128
(6 choices)
φ/2 to φ/32
(3 choices)
φ/8192
Event Waveform
Input Pin Output Pin Remarks
 

TMOW

TMIB
TMCIV TMOV
FTCI FTOA
FTIA FTOB
FTIB
FTIC
FTID
 
Rev. 6.00 Sep 12, 2006 page 203 of 526
Section 9 Timers
REJ09B0326-0600