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T89C51RD2-3CWC-L Datasheet(PDF) 40 Page - ATMEL Corporation

Part # T89C51RD2-3CWC-L
Description  0 to 40MHz Flash Programmable 8-bit Microcontroller
PDF  86 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C51RD2-3CWC-L Datasheet(HTML) 40 Page - ATMEL Corporation

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Rev. F - 15 February, 2001
T89C51RD2
Table 20. IPH Register
IPH - 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 bit high.
PPCHPPC
Priority Level
0
0
Lowest
01
10
1
1
Highest
5
PT2H
Timer 2 overflow interrupt Priority High bit
PT2HPT2
Priority Level
0
0
Lowest
01
10
1
1
Highest
4
PSH
Serial port Priority High bit
PSHPS
Priority Level
0
0
Lowest
01
10
1
1
Highest
3
PT1H
Timer 1 overflow interrupt Priority High bit
PT1HPT1
Priority Level
0
0
Lowest
01
10
1
1
Highest
2
PX1H
External interrupt 1 Priority High bit
PX1HPX1
Priority Level
0
0
Lowest
01
10
1
1
Highest
1
PT0H
Timer 0 overflow interrupt Priority High bit
PT0HPT0
Priority Level
0
0
Lowest
01
10
1
1
Highest
0
PX0H
External interrupt 0 Priority High bit
PX0HPX0
Priority Level
0
0
Lowest
01
10
1
1
Highest



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