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HT46R0664 Datasheet(PDF) 65 Page - Holtek Semiconductor Inc |
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HT46R0664 Datasheet(HTML) 65 Page - Holtek Semiconductor Inc |
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65 / 92 page  Rev. 1.00 64 ����st 1�� �011 Rev. 1.00 65 ����st 1�� �011 HT46R0664 Enhanced A/D+LCD 8-Bit OTP MCU Interrupts Interrupts are an important part of any microcontroller system. When an external event or an internal function such as a Timer/Event Counter or Time Base require microcontroller attention, their corresponding interrupt will enforce a temporary suspension of the main program allowing the microcontroller to direct attention to their respective needs. The device contains four external interrupts and multiple internal interrupts. The external interrupts are controlled by the action of the external interrupt pins, while the internal interrupt is controlled by the Timer/Event Counters and Time Base overflows. Interrupt Registers Overall interrupt control, which means interrupt enabling and request flag setting, is controlled by using three registers, INTC0, INTC1 and MFIC. By controlling the appropriate enable bits in these registers each individual interrupt can be enabled or disabled. Also when an interrupt occurs, the corresponding request flag will be set by the microcontroller. The global enable flag cleared to zero will disable all interrupts. INTEG Register Bit 7 6 5 4 3 2 1 0 Name INT3S1 INT3S0 INT�S1 INT�S0 INT1S1 INT1S0 INT0S1 INT0S0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 1 0 1 0 1 0 1 0 Bit 7~6 INT3S1, INT3S0: Interrupt edge control for INT3 pin 00: disable 01: rising edge 10: falling edge 11: both rising and falling edge Bit 5~4 INT2S1, INT2S0: Interrupt edge control for INT2 pin 00: disable 01: rising edge 10: falling edge 11: both rising and falling edge Bit 3~2 INT1S1, INT1S0: Interrupt edge control for INT1 pin 00: disable 01: rising edge 10: falling edge 11: both rising and falling edge Bit 1~0 INT0S1, INT0S0: Interrupt edge control for INT0 pin 00: disable 01: rising edge 10: falling edge 11: both rising and falling edge |
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