TS80C51RA2 Atmel Corporation, TS80C51RA2 Datasheet - Page 42

• Manufacturer Part Number: TS80C51RA2
• Description: High Performance 8-bit Microcontroller
• Manufacturer: Atmel Corporation

42
TS8xC51Rx2
Table 23. IPH Register
IPH - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
PPCH
Mnemonic
6
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
Bit
-
PT2H
5
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit high.
PPCH
Timer 2 overflow interrupt Priority High bit
PT2H
Serial port Priority High bit
Timer 1 overflow interrupt Priority High bit
PT1H
External interrupt 1 Priority High bit
PX1H
Timer 0 overflow interrupt Priority High bit
PT0H
External interrupt 0 Priority High bit
PX0H
PSH
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
PPC
PX1
PX0
PT2
PT1
PT0
PSH
PS
4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Lowest
Highest
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Priority Level
PT1H
3
PX1H
2
PT0H
1
4188A–8051–10/02
PX0H
0