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80960 数据表(PDF) 21 Page - Intel Corporation |
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80960 数据表(HTML) 21 Page - Intel Corporation |
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21 / 77 page  Advance Information Datasheet 21 80960JA/JF/JD/JT 3.3 V Microprocessor Table 5. Pin Description — Interrupt Unit Signals NAME TYPE DESCRIPTION XINT7:0 I A(E/L) EXTERNAL INTERRUPT pins are used to request interrupt service. The XINT7:0 pins can be configured in three modes: Dedicated Mode: Each pin is assigned a dedicated interrupt level. Dedicated inputs can be programmed to be level (low) or edge (falling) sensitive. Expanded Mode: All eight pins act as a vectored interrupt source. The interrupt pins are level sensitive in this mode. Mixed Mode: The XINT7:5 pins act as dedicated sources and the XINT4:0 pins act as the five most significant bits of a vectored source. The least significant bits of the vectored source are set to 0102 internally. Unused external interrupt pins should be connected to VCC. NMI I A(E) NON-MASKABLE INTERRUPT causes a non-maskable interrupt event to occur. NMI is the highest priority interrupt source and is falling edge-triggered. If NMI is unused, it should be connected to VCC. |
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