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4519 Datasheet(PDF) 39 Page - Renesas Technology Corp |
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4519 Datasheet(HTML) 39 Page - Renesas Technology Corp |
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39 / 272 page  FUNCTION BLOCK OPERATIONS 4519 Group HARDWARE 1-26 Rev.1.00 Aug 06, 2004 REJ09B0175-0100Z Table 7 External interrupt activated conditions Name External 0 interrupt External 1 interrupt Input pin P30/INT0 P31/INT1 Activated condition When the next waveform is input to P30/INT0 pin • Falling waveform (“H” →“L”) • Rising waveform (“L” →“H”) • Both rising and falling waveforms When the next waveform is input to P31/INT1 pin • Falling waveform (“H” →“L”) • Rising waveform (“L” →“H”) • Both rising and falling waveforms Valid waveform selection bit I11 I12 I21 I22 Fig. 17 External interrupt circuit structure EXTERNAL INTERRUPTS The 4519 Group has the external 0 interrupt and external 1 inter- rupt. An external interrupt request occurs when a valid waveform is input to an interrupt input pin (edge detection). The external interrupt can be controlled with the interrupt control registers I1 and I2. Rising Falling One-sided edge detection circuit Key-on wakeup External 1 interrupt Timer 3 count start synchronous circuit Level detection circuit Edge detection circuit Skip decision (SNZI1 instruction) Both edges detection circuit 0 1 I22 0 1 EXF1 I21 P31/INT1 K22 I23 0 1 K23 Rising 0 1 Falling I12 One-sided edge detection circuit Key-on wakeup 0 1 EXF0 External 0 interrupt I11 P30/INT0 K20 Timer 1 count start synchronous circuit I13 (Note 1) Level detection circuit Edge detection circuit 0 1 K21 Skip decision (SNZI0 instruction) Both edges detection circuit This symbol represents a parasitic diode on the port. Notes 1: (Note 2) (Note 3) (Note 1) (Note 2) (Note 3) 2: I12 (I22) = 0: “L” level detected I12 (I22) = 1: “H” level detected 3: I12 (I22) = 0: Falling edge detected I12 (I22) = 1: Rising edge detected Period measurement circuit input |
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