M30620FCAFP datasheet(326/615 Pages) RENESAS

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Timer A

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-9

Figure 2.2.3. Timer A-related registers (2)

Symbol

Address

When reset

TABSR

038016

0016

Count start flag

Bit name

Function

Bit symbol

Timer B2 count start flag

Timer B1 count start flag

Timer B0 count start flag

Timer A4 count start flag

Timer A3 count start flag

Timer A2 count start flag

Timer A1 count start flag

Timer A0 count start flag

0 : Stops counting

1 : Starts counting

TB2S

TB1S

TB0S

TA4S

TA3S

TA2S

TA1S

TA0S

Symbol

Address

When reset

TA0

038716,038616

Indeterminate

TA1

038916,038816

Indeterminate

TA2

038B16,038A16

Indeterminate

TA3

038D16,038C16

Indeterminate

TA4

038F16,038E16

Indeterminate

b0 b7

(b15)

(b8)

Timer Ai register (Note 1)

• Timer mode

000016 to FFFF16

Counts an internal count source

Function

Values that can be set

• Event counter mode

000016 to FFFF16

Counts pulses from an external source or timer overflow

• One-shot timer mode

000016 to FFFF16

Counts a one shot width

(Note 2,4)

• Pulse width modulation mode (16-bit PWM)

Functions as a 16-bit pulse width modulator

• 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 3,4)

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

Note 2: When the timer Ai register is set to “000016”, the counter does not

operate and the timer Ai interrupt request is not generated. When

the pulse is set to output, the pulse does not output from the TAiOUT

pin.

Note 3: When the timer Ai register is set to “000016”, the pulse width

modulator does not operate and the output level of the TAiOUT pin

remains “L” level, therefore the timer Ai interrupt request is not

generated. This also occurs in the 8-bit pulse width modulator mode

when the significant 8 high-order bits in the timer Ai register are set

to “0016”.

Note 4: Use MOV instruction to write to this register.

0016 to FE16

(High-order address)

0016 to FF16

(Low-order address)

(Note 3,4)

M30620FCAFP Datasheet(PDF) 326 Page - Renesas Technology Corp

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