R8C datasheet(65/199 Pages) RENESAS

65 / 199 page

R8C/10 Group

Rev.1.20 Jan 27, 2006

page 55 of 180

REJ09B0019-0120

12. Timers

The microcomputer has three 8-bit timers and one 16-bit timer. The three 8-bit timers are Timer X, Timer Y,

and Timer Z and each one has an 8-bit prescaler. The 16-bit timer is Timer C and has a capture. All these

timers function independently. The count source for each timer is the operating clock that regulates the

timing of timer operations such as counting and reloading.

Table 12.1 lists functional comparison.

Item

Timer X

Timer Y

Timer Z

Timer C

Configuration

8-bit timer

16-bit timer

with 8-bit

prescaler

Count

Down

Count source

•f1

•f2

•f8

•f2

•f8

•fRING

•f8

•f32

•Input from

•Timer Y

CNTR1 pin

underflow

Function

Timer mode

provided

not provided

Pulse output mode

provided

not provided

Event counter mode

provided

provided(1)

not provided

Pulse width

measurement mode

provided

not provided

Pulse period

measurement mode

provided

not provided

Programmable waveform

generation mode

not provided

provided

not provided

Programmable one-shot

generation mode

not provided

provided

not provided

Programmable wait

one-shot generation mode

not provided

provided

not provided

Capture

not provided

provided

Input pin

CNTR0

CNTR1

INT0

TCIN

Output pin

CNTR0

CNTR1

TZOUT

not provided

Related interrupt

Timer X int

Timer Y int

Timer Z int

Timer C int

INT1 int

INT2 int

INT0 int

INT3 int

Timer stop

provided

Table 12.1 Functional Comparison

NOTES:

1. Select the input from the CNTR1 pin as a count source of timer mode.

12. Timers

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