Renesas 4513 ユーザーズマニュアル

1-30

4513/4514 Group User’s Manual

Count source

• Instruction clock

• Prescaler output (ORCLK)

• Timer 1 underflow

• Prescaler output (ORCLK)

• CNTR0 input

• 16-bit timer underflow

• Timer 2 underflow

• Prescaler output (ORCLK)

• Timer 3 underflow

• Prescaler output (ORCLK)

• CNTR1 input

• Instruction clock

Structure

Frequency divider

8-bit programmable

binary down counter

(link to P3

0

/INT0 input)

8-bit programmable

binary down counter

8-bit programmable

binary down counter

(link to P3

1

/INT1 input)

8-bit programmable

binary down counter

16-bit fixed dividing

frequency

Circuit

Prescaler

Timer 1

Timer 2

Timer 3

Timer 4

16-bit timer

Use of output signal

• Timer 1, 2, 3 and 4 count sources

• Timer 2 count source

• CNTR0 output

• Timer 1 interrupt

• Timer 3 count source

• Timer 2 interrupt

• CNTR0 output

• Timer 4 count source

• Timer 3 interrupt

• CNTR1 output

• Timer 4 interrupt

• CNTR1 output

• Watchdog timer

  (The 15th bit is counted twice)

• Timer 2 count source

  (16-bit timer underflow)

Frequency

dividing ratio

4, 16

1 to 256

1 to 256

1 to 256

1 to 256

65536

Control

register

W1

W1

W6

W2

W6

W3

W6

W4

W6

The 4513/4514 Group timer consists of the following circuits.

• Prescaler : frequency divider

• Timer 1 : 8-bit programmable timer

• Timer 2 : 8-bit programmable timer

• Timer 3 : 8-bit programmable timer

• Timer 4 : 8-bit programmable timer

(Timers 1 to 4 have the interrupt function, respectively)

• 16-bit timer

Prescaler and timers 1 to 4 can be controlled with the timer control

registers W1 to W6. The 16-bit timer is a free counter which is not

controlled with the control register.

Each function is described below.