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AT80C51RA2-RLSIV 数据表(PDF) 43 Page - International Rectifier |
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AT80C51RA2-RLSIV 数据表(HTML) 43 Page - International Rectifier |
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43 / 85 page  43 4188E–8051–08/06 AT/TS8xC51Rx2 Table 6-19. IPH Register IPH - Interrupt Priority High Register (B7h) Reset Value = X000 0000b Not bit addressable 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 bit high. PPCH PPC Priority Level 00 Lowest 01 10 1 1 Highest 5PT2H Timer 2 overflow interrupt Priority High bit PT2H PT2 Priority Level 00 Lowest 01 10 1 1 Highest 4 PSH Serial port Priority High bit PSH PS Priority Level 00 Lowest 01 10 1 1 Highest 3PT1H Timer 1 overflow interrupt Priority High bit PT1H PT1 Priority Level 00 Lowest 01 10 1 1 Highest 2 PX1H External interrupt 1 Priority High bit PX1H PX1 Priority Level 00 Lowest 01 10 1 1 Highest 1PT0H Timer 0 overflow interrupt Priority High bit PT0H PT0 Priority Level 00 Lowest 01 10 1 1 Highest 0 PX0H External interrupt 0 Priority High bit PX0H PX0 Priority Level 00 Lowest 01 10 1 1 Highest |
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