tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 82
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
4.3.2 External interrupt 0
4.3.3 External interrupts 1/2/3
4.3.3.1
4.3.3.2
Note: x=1 to 3
Signal that has passed through
more are recognized as signals.
nized as signals.
pins and generate interrupt request signals.
External interrupt 0 detects the falling edge of the
In NORMAL1/2 or IDLE1/2 mode, pulses of less than 1/fcgck are removed as noise and pulses of 2/fcgck or
In SLOW/SLEEP mode, pulses of less than 4/fs are removed as noise and pulses of 8/fs or more are recog-
External interrupts 1/2/3 detect the falling edge, the rising edge or both edges of the INT1, INT2 and INT3
(detected at the falling edge)
(detected at the rising edge)
3.
generated
can be read by using EINTCRx<INTxLVL>. When both edges are selected as detection edges, the edge
where an interrupt is generated can be detected by reading EINTCRx<INTxLVL>.
(detected at both edges)
Interrupt request signal generating condition detection function
A noise canceller pass signal monitoring function when interrupt request signals are
Select interrupt request signal generating conditions at EINTCRx<INTxES> for external interrupts 1/2/
The level of a signal that has passed through the noise canceller when an interrupt request is generated
Interrupt request signal
Interrupt request signal
Interrupt request signal
the noise canceller
INT LVL
INT LVL
INT LVL
INTi pin
Table 4-2 Selection of Interrupt Request Generation Edge
EINTCRx<INTxES>
00
01
10
11
Page 68
INT0
Falling edge
Rising edge
Detected at
Both edges
Reserved
pin and generates interrupt request signals.
TMP89FM42
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