AT89C51RB2/RC2
Table 46. IPH0 Register
IPH0 - Interrupt Priority High Register (B7h)
7
6
5
4
3
2
1
0
-
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Bit
Bit
Number
Mnemonic Description
Reserved
7
-
The value read from this bit is indeterminate. Do not set this bit.
PCA Interrupt Priority High Bit
PPCHPPCL Priority Level
0
0
1
1
0
1
0
1
Lowest
6
PPCH
PT2H
PSH
Highest
Timer 2 Overflow Interrupt Priority High Bit
PT2HPT2L
0
0
1
1
Priority Level
Lowest
0
1
0
1
5
4
3
2
1
0
Highest
Serial Port Priority High Bit
PSH PSL
0
0
1
1
Priority Level
Lowest
0
1
0
1
Highest
Timer 1 Overflow Interrupt Priority High Bit
PT1HPT1L
0
0
1
1
Priority Level
Lowest
0
1
0
1
PT1H
PX1H
PT0H
PX0H
Highest
External Interrupt 1 Priority High Bit
PX1HPX1L
0
0
1
1
Priority Level
Lowest
0
1
0
1
Highest
Timer 0 Overflow Interrupt Priority High Bit
PT0HPT0L
0
0
1
1
Priority Level
Lowest
0
1
0
1
Highest
External Interrupt 0 Priority High Bit
PX0H PX0L Priority Level
0
0
1
1
0
1
0
1
Lowest
Highest
Reset Value = X000 0000b
Not bit addressable
59
4180E–8051–10/06
ATMEL [ ATMEL ]
