TMP89FS60 datasheet(83/410 Pages) TOSHIBA

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TMP89FS60

RA000

Note: The contents of EINTCRx<INTxLVL> are updated each time an interrupt request signal is generated.

Figure 4-4 Interrupt Request Generation and EINTCRx<INTxLVL>

4.3.3.3

Noise cancel time selection function

In NORMAL1/2 or IDLE1/2 mode, a signal that has been sampled by fcgck is sampled at the sampling

interval selected at EINTCRx<INTxNC>. If the same level is detected three consecutive times, the signal

is recognized as a signal. If not, the signal is removed as noise.

Figure 4-5 Noise Cancel Operation

In SLOW1/2 or SLEEP1 mode, a signal is sampled by the low frequency clock divided by 4. If the same

level is detected twice consecutively, the signal is recognized as a signal.

In IDLE0, SLEEP0 or STOP mode, the noise canceller sampling operation is stopped and an external

interrupts are unavailable. When operation returns to NORMAL1/2, IDLE1/2, SLOW1/2 or SLEEP1

mode, sampling operation restarts.

Note 1: If noise is input consecutively during sampling of external interrupt pins, the noise cancel function

does not work properly. Set EINTCRx<INTxNC> according to the cycle of externally input noise.

Note 2: If an external interrupt pin is used as an output port, the input signal to the port is fixed to "L" when the

mode is switched to the output mode, and thus an interrupt request occurs. To use the pin as an out-

put port, clear the corresponding interrupt enable register to "0" to disable the generation of interrupt.

Note 3: Interrupt requests may be generated during transition of the operation mode. Before changing the

operation mode, clear the corresponding interrupt enable register to "0" to disable the generation of

interrupt. When the operation mode is changed from NORMAL1/2 or IDLE1/2 to SLOW1/2 or

SLEEP1, wait 12/fs [s] after the operation mode is changed and clear the interrupt latch. And when

the operation mode is changed from SLOW1/2 or SLEEP1 to NORMAL1/2 or IDLE1/2, wait 2/

fcgck+3/fspl [s] after the operation mode is changed and clear the interrupt latch.

4.3.4

External interrupt 4

External interrupt 4 detects the falling edge, the rising edge, both edges or "H" level of the INT4 pin and gen-

erates interrupt request signals.

4.3.4.1

Interrupt request signal generating condition detection function

Select an interrupt request signal generating condition at EINTCR4<INT4ES> for external interrupt 4.

Table 4-3

Noise Canceller Sampling Lock

EINTCRx<INTxNC>

Sampling interval

fcgck

fcgck/22

fcgck/23

fcgck/24

INTi pin

Signal after noise removal

i=1 to 3

Noise

Signal

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