R8CSLASH15 datasheet(84/277 Pages) RENESAS

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R8C/14 Group, R8C/15 Group

11. Interrupt

Rev.2.10

Jan 19, 2006

Page 72 of 253

REJ09B0164-0210

11.2.4

INT3 Interrupt

The INT3 interrupt is generated by the INT3 input. Set the TCC07 bit in the TCC0 register to “0”

(INT3).

When the TCC06 bit in the TCC0 register is set to “0”, the INT3 interrupt request is generated

synchronizing with the count source of timer C. When the TCC06 bit is set to “1”, the INT3 interrupt

request is generated when the INT3 is input.

The INT3 input contains a digital filter. The IR bit in the INT3IC register is set to “1” (interrupt

requested) when the INT3 level is sampled for every sampling clock and the sampled input level

matches three times. The sampling clock is selected by the TCC11 to TCC10 bits in the TCC1

clock even if the TCC06 bit is set to “1”. The P3_3 bit in the P3 register indicates the previous value

before filtering regardless of the contents set in the TCC11 to TCC10 bits.

The INT3 pin is used with the TCIN pin.

When setting the TCC07 bit to “1” (fRING128), the INT3 interrupt is generated by the fRING128

clock. The IR bit in the INT3IC register is set to “1” (interrupt requested) every fRING128 clock cycle

or every half fRING128 clock cycle.

Figure 11.15 shows the TCC0 Register and Figure 11.16 shows the TCC1 Register.

Figure 11.15

TCC0 Register

Timer C Control Register 0

Symbol

Address

After Reset

TCC0

009Ah

00h

Bit Symbol

Bit Name

Function

INT3

_____

Interrupt and Capture

Polarity Select Bit(1,2)

Set to “0”

INT3

_____

Interrupt Request Generation

0 : INT3

_____

Interrupt is generated

Timing Select Bit(2,3)

synchronizing w ith Timer C count

1 : INT3

_____

Interrupt is generated w hen

INT3

_____

interrupt is input(4)

INT3

_____

Interrupt and Capture Input

0 : INT3

_____

Sw itch Bit(1,2)

1 : fRING128

NOTES :

When the TCC13 bit is set to “1” (output compare mode) and INT3

_____

interrupt is input, regardless of the

When using INT3

_____

filter, the INT3

_____

interrupt is generated synchronizing w ith the clock for the digital filter.

setting value of the TCC06 bit, an interrupt request is generated.

TCC02

TCC07

TCC06

Change this bit w hen the TCC00 bit is set to “0” (count stop).

TCC00

TCC01

b1 b0

b7 b6 b5 b4 b3 b2

TCC04

TCC03

Timer C Count Start Bit

0 : Stops counting

1 : Starts counting

Timer C Count Source Select Bit(1)

b2 b1

0 0 : f1

0 1 : f8

1 0 : f32

1 1 : fRING-fast

The IR bit in the INT3IC register may be set to “1” (requests interrupt) w hen the TCC03, TCC04, TCC06 and TCC07

bits are rew ritten. Refer to 20.2.5 Changing Interrupt Factor.

b4 b3

0 0 : Rising edge

0 1 : Falling edge

1 0 : Both edges

1 1 : Do not set

—

(b5)

Reserved Bit

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