Section 9 Timers; Overview; Table 9.1 Timer Functions - Renesas H8/3847R Series Hardware Manual

9.1

Overview

This LSI provides six timers: timers A, C, F, G, and a watchdog timer, and an asynchronous event
counter. The functions of these timers are outlined in table 9.1.
Table 9.1 Timer Functions
Name Functions
• 8-bit interval timer
Timer A
• Interval function
• Time base
• Clock output
• 8-bit timer
Timer C
• Interval function
• Event counting function
• Up-count/down-count
selectable
• 16-bit timer
Timer F
• Event counting function
• Also usable as two
independent 8-bit
timers
• Output compare output
function
• 8-bit timer
Timer G
• Input capture function
• Interval function
• Reset signal generated
Watchdog
timer
when 8-bit counter
overflows

Section 9 Timers

Internal Clock
φ/8 to φ/8192
(8 choices)
φ
/128 (choice of
W
4 overflow periods)
φ/4 to φ/32 φ , φ
W W
to φ
/32 (9 choices)
W
φ/4 to φ/8192, φ
/4
W
(7 choices)
φ/4 to φ/32, φ
/4
W
(4 choices)
φ/2 to φ/64, φ
/4
W
(4 choices)
φ/8192
φw/32
Event Waveform
Input Pin Output Pin Remarks
— —
/4 — TMOW
TMIC —
TMIF TMOFL
TMOFH
TMIG —
— —
Rev. 6.00 Aug 04, 2006 page 257 of 680
Section 9 Timers
Up-count/
down-count
controllable by
software or
hardware
Counter
clearing option
Built-in capture
input signal
noise canceler
REJ09B0145-0600