tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 88

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
4. External Interrupt control circuit
4.1
4.2
INTi pin
INT4 pin
by the built-in digital noise canceller.
and an interrupt signal generation circuit.
interrupt, after noise is removed by the noise canceller.
Configuration
Control
External interrupts detects the change of the input signal and generates an interrupt request. Noise can be removed
The external interrupt control circuit consists of a noise canceller, an edge detection circuit, a level detection circuit
Externally input signals are input to the rising edge or falling edge or level detection circuit for each external
External interrupts are controlled by the following registers:
fcgck
INTj pin
fcgck
fs/4
fs
Noise canceller
Noise canceller
A B C D S
1
A B C D S
1
2
2
Z
Z
3 4
Noise canceller
3 4
fcgck
Figure 4-2 External Interrupts 1/2/3
Figure 4-1 External Interrupts 0/5
Figure 4-3 External Interrupt 4
fs/4
EINTCR4
EINTCRi
detection circuit
detection circuit
Level detection
detection circuit
detection circuit
Falling edge
Rising edge
Rising edge
Falling edge
Page 69
detection circuit
circuit
Falling edge
INT4ES
INTiES
INT4LVL
INTiLVL
signal generation
Interrupt request
signal generation
Interrupt request
Interrupt request signal
generation circuit
circuit
circuit
INTj interrupt
request
j=0,5
TMP89FM42A
INT4 interrupt
request
i=1 to 3
INTi interrupt
request