tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 84
tmp89fm42
Manufacturer Part Number
tmp89fm42
Description
8 Bit Microcontroller
Manufacturer
TOSHIBA Semiconductor CORPORATION
Datasheet
1.TMP89FM42.pdf
(408 pages)
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4.3 Function
4. External Interrupt control circuit
RA000
4.3.4.2
4.3.4.3
Signal that has passed through
(detected at the falling edge)
(detected at the rising edge)
(detected at both edges)
Interrupt request signal
Interrupt request signal
Interrupt request signal
Interrupt request signal
Figure 4-6 Interrupt Request Generation and EINTCR4<INT4LVL>
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>.
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.
A noise canceller pass signal monitoring function when interrupt request signals are
Noise cancel time selection function
The level of a signal that has passed through the noise canceller when an interrupt request is generated
In NORMAL1/2 or IDLE1/2 mode, a signal that has been sampled by fcgck is sampled at the sampling
the noise canceller
(level detection)
INT4 pin
INT4LVL
INT4LVL
INT4LVL
INT4LVL
Table 4-4 Selection of Interrupt Request Generation Edge
EINTCR4<INT4ES>
00
01
10
11
Page 70
"H" level interrupt
Falling edge
Rising edge
Detected at
Both edges
TMP89FM42
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