AT80C51RA2-3CSCV View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'AT80C51RA2-3CSCV' PDF : 86 Pages View PDF
4188F–8051–01/08
AT/TS8xC51Rx2
Table 6-19. IPH Register
IPH - Interrupt Priority High Register (B7h)
7
6
5
4
3
-
PPCH
PT2H
PSH
PT1H
2
PX1H
1
PT0H
Bit
Number
7
6
Bit
Mnemonic
-
PPCH
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit high.
PPCHPPC
Priority Level
0 0 Lowest
01
10
1 1 Highest
Timer 2 overflow interrupt Priority High bit
PT2H PT2
Priority Level
5
PT2H
00
01
Lowest
10
1 1 Highest
Serial port Priority High bit
PSH PS Priority Level
4
PSH
0 0Lowest
01
10
1 1Highest
Timer 1 overflow interrupt Priority High bit
PT1H PT1Priority Level
3
PT1H
0 0Lowest
01
10
1 1Highest
External interrupt 1 Priority High bit
PX1HPX1Priority Level
2
PX1H
0 0Lowest
01
10
1 1Highest
Timer 0 overflow interrupt Priority High bit
PT0H PT0 Priority Level
1
PT0H
00
01
Lowest
10
1 1 Highest
0
PX0H
Reset Value = X000 0000b
Not bit addressable
External interrupt 0 Priority High bit
PX0HPX0 Priority Level
0 0 Lowest
01
10
1 1 Highest
0
PX0H
43
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