M30201_M Datasheet, PDF(235/415 Page) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

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M30201_M Datasheet, PDF (235/415 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY

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Timer X

Mitsubishi microcomputers

M30201 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Timer Xi mode register

b7 b6 b5 b4 b3 b2 b1 b0

Symbol

Address

TXiMR(i = 0 to 2) 039716 to 039916

When reset

0016

Bit symbol

Bit name

Function

R

W

TMOD0

TMOD1

Operation mode

select bit

b1 b0

0 0 : Timer mode

0 1 : Event counter mode

1 0 : One-shot timer mode or pulse period/

pulse width measurement mode

1 1 : Pulse width modulation (PWM) mode

MR0

Function varies with each operation mode

MR1

MR2

MR3

TCK0

TCK1

Count source select bit

(Function varies with each operation mode)

Note 1: Must set â00â to operation mode select bit when using timer X2 of M30200.

Timer Xi register (Note 1)

(b15)

b7

(b8)

b0 b7

Symbol

b0

TX0

TX1

TX2

Address

038916,038816

038B16,038A16

038D16,038C16

When reset

Indeterminate

Indeterminate

Indeterminate

Function

â¢ Timer mode

Counts an internal count source

Values that can be set R W

000016 to FFFF16

â¢ Event counter mode

000016 to FFFF16

Counts pulses from an external source or timer overflow

â¢ One-shot timer mode

Counts a one shot width

000016 to FFFF16

(Note 2)

â¢ Pulse period / pulse width measurement mode

Measures a pulse period or width

â¢ Pulse width modulation mode (16-bit PWM)

Functions as a 16-bit pulse width modulator

â¢ Pulse width modulation mode (8-bit PWM)

Timer low-order address functions as an 8-bit

prescaler and high-order address functions as an 8-bit

pulse width modulator

000016 to FFFE16

(Note 2)

0016 to FF16(Note 2)

(High-order

addresses)

0016 to FF16 (Note 2)

(Low-order

addresses)

Note 1: Read and write data in 16-bit units.

Note 2: Use MOV instruction to write to this register.

Count start flag

b7 b6 b5 b4 b3 b2 b1 b0

Symbol

TABSR

Address

038016

When reset

000X00002

Bit symbol

Bit name

Function

TA0S

TX0S

Timer A0 count start flag

Timer X0 count start flag

0 : Stops counting

1 : Starts counting

TX1S

Timer X1 count start flag

TX2S

Timer X2 count start flag

Nothing is assigned.

In an attempt to write to this bit, write â0â. The value, if read, turns out to be

indeterminate.

TB0S

TB1S

Timer B0 count start flag

Timer B1 count start flag

0 : Stops counting

1 : Starts counting

CDCS

Clock devided count start flag

RW

Figure 2.4.2. Timer X-related registers (1)

222

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