External Interrupts; Fig. 17 External Interrupt Circuit Structure; Table 7 External Interrupt Activated Conditions - Renesas 4513 User Manual

HARDWARE
FUNCTION BLOCK OPERATIONS

EXTERNAL INTERRUPTS

The 4513/4514 Group has two external interrupts (external 0 and
external 1). An external interrupt request occurs when a valid
waveform is input to an interrupt input pin (edge detection).
The external interrupts can be controlled with the interrupt control
registers I1 and I2.

Table 7 External interrupt activated conditions

Name
External 0 interrupt P3
External 1 interrupt P3
P3 /INT0
0
P3 /INT1
1

Fig. 17 External interrupt circuit structure

1-26
Input pin
/INT0 When the next waveform is input to P3
0
• Falling waveform ("H" "L")
• Rising waveform ("L" "H")
• Both rising and falling waveforms
/INT1
When the next waveform is input to P3
1
• Falling waveform ("H" "L")
• Rising waveform ("L" "H")
• Both rising and falling waveforms
I1
2
One-sided edge
Falling
detection circuit
0
1
Both edges
Rising
detection circuit
SNZI0
I2
2
One-sided edge
Falling
detection circuit
0
1
Both edges
Rising
detection circuit
SNZI1
4513/4514 Group User's Manual
Activated condition
I1
1
0
1
Wakeup
Skip
I2
1
0
1
Wakeup
Skip
This symbol represents a parasitic diode on the port.
/INT0 pin
0
/INT1 pin
1
External 0
EXF0
interrupt
External 1
EXF1
interrupt
Valid waveform
selection bit
I1
1
I1
2
I2
1
I2
2