HD6433713 datasheet(146/324 Pages) RENESAS

146 / 324 page

Section 8 Timers

8.1 Overview

The H8/3714 Series provides on-chip two prescalers (prescaler S and prescaler W) with different

input clocks, and five timers (timers A through E).

Prescaler S is a 13-bit counter clocked by the system clock (

φ = f

OSC/2). Its prescaled outputs are

used by timers A to C and timer E.

Prescaler W is a 5-bit counter clocked by the subclock (

SUB = fX/8). Its prescaled output is used

for time-base operation by timer A.

Table 8-1 outlines the functions of timers A through E.

Table 8-1 Timer A to E Functions

Operating Clock

Event

Waveform

Name

Functions

(internal)

Input Pin

Output Pin

Remarks

Timer A

• 8-bit interval timer

φ/8 to φ/8192

—

(choice of 8 sources)

• Time base

SUB/32

—

(choice of 4 overflow

periods)

Timer B

• 8-bit reloadable timer

P10/IRQ0

——

• Interval timer

• Event counter

Timer C • 8-bit reloadable timer

P11/IRQ1

—

• Interval timer

• Event counter

• Choice of up- or

down-counting

Timer D • 8-bit event counter

—

P16/EVENT ——

Timer E

• 8-bit reloadable timer

—

• Interval timer

Can output

square wave

with 50%

duty cycle

Counting

direction

can be

controlled by

software or

hardware.

φ/8 to φ/8192

(choice of 7 sources)

φ/8 to φ/8192

(choice of 8 sources)

P15/IRQ5/

TMOE

φ/8 to φ/8192

(choice of 7 sources)

135

HD6433713 Datasheet(PDF) 146 Page - Renesas Technology Corp

HD6433713 Datasheet(HTML) 146 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL