TMP89FS60 datasheet(84/410 Pages) TOSHIBA

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4. External Interrupt control circuit

4.3 Function

TMP89FS60

RA000

4.3.4.2

A noise canceller pass signal monitoring function when interrupt request signals are

generated

The level of a signal that has passed through the noise canceller when an interrupt request is generated

can be read by using EINTCR4<INT4LVL>. When both edges are selected as detection edges, the edge

where an interrupt is generated can be detected by reading EINTCR4<INT4LVL>.

Figure 4-6 Interrupt Request Generation and EINTCR4<INT4LVL>

4.3.4.3

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<INT4NC>. If the same level is detected three consecutive times, the signal

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

Table 4-4

Selection of Interrupt Request Generation Edge

EINTCR4<INT4ES>

Detected at

Rising edge

Falling edge

Both edges

"H" level interrupt

INT4 pin

Interrupt request signal

(detected at the falling edge)

Interrupt request signal

(detected at the rising edge)

Interrupt request signal

(detected at both edges)

INT4LVL

Interrupt request signal

(level detection)

Signal that has passed through

the noise canceller

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