M16C1N datasheet(86/238 Pages) RENESAS

86 / 238 page

Rev.1.00

Oct 20, 2004

page 74 of 222

M16C/1N Group

12. Timers

REJ09B0007-0100Z

b5 b4

Timer count source setting register

TXCK0

TXCK1

Timer X count source

select bit (Note 1)

Symbol

TCSS

Address

008E16

When reset

0016

Function

Bit name

Bit symbol

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : fC32

b1 b0

TYCK0

TYCK1

Timer Y count source

select bit (Note 1, 2)

0 0 : f1

0 1 : f8

1 0 : On-chip oscillator output (Note 3)

1 1 : fC32

b3 b2

TZCK0

TZCK1

Timer Z count source

select bit (Note 1, 4)

0 0 : f1

0 1 : f8

1 0 : Timer Y underflow

1 1 : fC32

b5 b4

T1CK0

T1CK1

Timer 1 count source

select bit

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : fC32

b7 b6

Note 1: Avoid switching a count source, while a counter is in progress. Timer counter should be stopped before

switching a count source.

Note 2: The waveform extend function cannot be used when selecting f1 for count source.

Note 3: When attempting to select on-chip oscillator output, set the on-chip oscillation enable bit (CM14) of the

system clock control register (address 000716) for oscillation enabled.

Note 4: The waveform extend function cannot be used when selecting Timer Y underflow and f1 for count source.

Both the Timer Y primary underflow and the Timer Y secondary underflow are counted when selecting the

Timer Y underflow for count source.

Prescaler X

Symbol

PREX

Address

008C16

When reset

FF16

Function

Values that can be set

Timer mode

Internal count source is counted

0016 to FF16

Pulse output mode

Internal count source is counted

0016 to FF16

Event counter mode

Externally input pulses are counted

0016 to FF16

Pulse period measurement mode

Underflow of prescaler X is counted

0116 to FF16

Pulse width measurement mode

Pulse width of externally input pulses is measured

(Internal count source is counted)

0016 to FF16

Timer mode, Pulse output mode, Event counter mode,

Pulse width measurement mode

Underflow of prescaler X is counted

0016 to FF16

Pulse period measurement mode

Pulse period of externally input pulses is measured

(Internal count source is counted)

0016 to FF16

Timer X

Symbol

Address

008D16

When reset

FF16

Function

Values that can be set

Figure 12.5 Timer X-related registers (2)

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