AT80C51RA2-3CSCV View Datasheet(PDF) - International Rectifier
Part Name
Description
MFG CO.
'AT80C51RA2-3CSCV' PDF : 85 Pages View PDF
4188E–8051–08/06
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.
PPCH PPC
Priority Level
00
Lowest
01
10
11
Highest
0
PX0H
Timer 2 overflow interrupt Priority High bit
PT2H PT2
Priority Level
5
PT2H
00
01
Lowest
10
11
Highest
Serial port Priority High bit
PSH PS
Priority Level
4
PSH
00
01
Lowest
10
11
Highest
Timer 1 overflow interrupt Priority High bit
PT1H PT1
Priority Level
3
PT1H
00
01
Lowest
10
11
Highest
External interrupt 1 Priority High bit
PX1H PX1
Priority Level
2
PX1H
00
01
Lowest
10
11
Highest
Timer 0 overflow interrupt Priority High bit
PT0H PT0
Priority Level
1
PT0H
00
01
Lowest
10
11
Highest
External interrupt 0 Priority High bit
PX0H PX0
Priority Level
0
PX0H
00
01
Lowest
10
11
Highest
Reset Value = X000 0000b
Not bit addressable
43
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