Manual

94
AT89C5131
4136A–USB–03/03
Table 67. IPH0 Register
IPH0 - 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.
6PPCH
PCA interrupt Priority high bit.
PPCH
PPCL Priority Level
0 0 Lowest
01
10
1 1 Highest
5PT2H
Timer 2 overflow interrupt Priority High bit
PT2H
PT2L Priority Level
0 0 Lowest
01
10
1 1 Highest
4PSH
Serial port Priority High bit
PSH
PSL Priority Level
0 0 Lowest
01
10
1 1 Highest
3PT1H
Timer 1 overflow interrupt Priority High bit
PT1H
PT1L Priority Level
0 0 Lowest
01
10
1 1 Highest
2PX1H
External interrupt 1 Priority High bit
PX1H
PX1L Priority Level
0 0 Lowest
01
10
1 1 Highest
1PT0H
Timer 0 overflow interrupt Priority High bit
PT0H
PT0L Priority Level
0 0 Lowest
01
10
1 1 Highest
0PX0H
External interrupt 0 Priority High bit
PX0H
PX0L Priority Level
0 0 Lowest
01
10
1 1 Highest