M16CSLASH1N datasheet(84/238 Pages) RENESAS

84 / 238 page

Rev.1.00

Oct 20, 2004

page 72 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 1

Symbol

PRE1

Address

008816

When reset

Indeterminate

Function

Values that can be set

When set value = n, Prescaler 1 divides the internal count

source by n+1

0016 to FF16

Timer 1

Symbol

Address

008916

When reset

Indeterminate

Function

Values that can be set

When set value = m, Timer 1 divides the underflow of

Prescaler 1 by m+1

0016 to FF16

Figure 12.2 Timer 1-related register

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