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AT89C51ED2-RDTUM Datasheet(PDF) 76 Page - ATMEL Corporation

Part # AT89C51ED2-RDTUM
Description  8-bit Flash Microcontroller
PDF  137 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51ED2-RDTUM Datasheet(HTML) 76 Page - ATMEL Corporation

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76
4235K–8051–05/08
AT89C51RD2/ED2
Table 17-5.
IPH0 Register
IPH0 - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
7
6
5
4
3
2
1
0
-
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 high bit.
PPCHPPCLPriority Level
0
0Lowest
0
1
1
0
1
1Highest
5
PT2H
Timer 2 overflow interrupt Priority High bit
PT2HPT2L
Priority Level
0
0Lowest
0
1
1
0
1
1Highest
4
PSH
Serial port Priority High bit
PSH PSLPriority Level
0
0Lowest
0
1
1
0
1
1Highest
3
PT1H
Timer 1 overflow interrupt Priority High bit
PT1HPT1L Priority Level
0
0 Lowest
0
1
1
0
1
1Highest
2
PX1H
External interrupt 1 Priority High bit
PX1HPX1LPriority Level
0
0Lowest
0
1
1
0
1
1Highest
1
PT0H
Timer 0 overflow interrupt Priority High bit
PT0HPT0LPriority Level
0
0Lowest
0
1
1
0
1
1Highest
0
PX0H
External interrupt 0 Priority High bit
PX0H PX0LPriority Level
0
0Lowest
0
1
1
0
1
1Highest



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