at89c51ic2-slsim ATMEL Corporation, at89c51ic2-slsim Datasheet - Page 62

• Manufacturer Part Number: at89c51ic2-slsim
• Description: At89c51ic2 8-bit Flash Microcontroller With 2-wire Interface
• Manufacturer: ATMEL Corporation

62
AT89C51IC2
Table 50. IPH0 Register
IPH0 - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
PPCH
PPCH
PT2H
PT1H
PX1H
PT0H
PX0H
PSH
Bit
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt Priority high bit.
PPCHPPCLPriority Level
0
0
1
1
Timer 2 overflow interrupt Priority High bit
PT2HPT2LPriority Level
0
0
1
1
Serial port Priority High bit
PSH PSLPriority Level
0
0
1
1
Timer 1 overflow interrupt Priority High bit
PT1HPT1L Priority Level
0
0
1
1
External interrupt 1 Priority High bit
PX1HPX1LPriority Level
0
0
1
1
Timer 0 overflow interrupt Priority High bit
PT0HPT0LPriority Level
0
0
1
1
External interrupt 0 Priority High bit
PX0H PX0LPriority Level
0
0
1
1
PT2H
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
5
Lowest
Highest
Lowest
Highest
Lowest
Highest
Highest
Lowest
Highest
Lowest
Highest
Lowest
Highest
Lowest
PSH
4
PT1H
3
PX1H
2
PT0H
1
4301D–8051–02/08
PX0H
0