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AT89C51AC3-RDTIM 数据表(PDF) 119 Page - ATMEL Corporation |
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AT89C51AC3-RDTIM 数据表(HTML) 119 Page - ATMEL Corporation |
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119 / 143 page  119 AT89C51AC3 4383B–8051–01/05 Table 69. IPL0 Register IPH0 (B7h) Interrupt High Priority Register Reset Value = X000 0000b 76 543 210 - PPCH PT2H PSH PT1H PX1H PT0H PX0H Bit Number Bit Mnemonic Description 7- Reserved The value read from this bit is indeterminate. Do not set this bit. 6 PPCH PCA Interrupt Priority Level Most Significant bit PPCH PPC Priority level 0 0 Lowest 0 1 1 0 1 1 Highest priority 5PT2H Timer 2 Overflow Interrupt High Priority bit PT2H PT2 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 4 PSH Serial Port High Priority bit PSH PS Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 3PT1H Timer 1 Overflow Interrupt High Priority bit PT1H PT1 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 2 PX1H External Interrupt 1 High Priority bit PX1H PX1 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 1PT0H Timer 0 Overflow Interrupt High Priority bit PT0H PT0 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest 0 PX0H External Interrupt 0 high priority bit PX0H PX0 Priority Level 0 0 Lowest 0 1 1 0 1 1 Highest |
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