T89C51RD2 ATMEL Corporation, T89C51RD2 Datasheet - Page 40

• Manufacturer Part Number: T89C51RD2
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

T89C51RD2
IPH - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
40
Number
Bit
7
6
5
4
3
2
1
0
7
-
Mnemonic
PPCH
PT2H
PT1H
PX1H
PT0H
PX0H
PSH
Bit
PPCH
-
6
Reserved
PCA interrupt priority bit high.
Timer 2 overflow interrupt Priority High bit
Serial port Priority High bit
Timer 1 overflow interrupt Priority High bit
External interrupt 1 Priority High bit
Timer 0 overflow interrupt Priority High bit
External interrupt 0 Priority High bit
The value read from this bit is indeterminate. Do not set this bit.
PPCHPPC
0
0
1
1
PT2HPT2
0
0
1
1
PSHPS
0
0
1
1
PT1HPT1
0
0
1
1
PX1HPX1
0
0
1
1
PT0HPT0
0
0
1
1
PX0HPX0
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
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Table 20. IPH Register
Priority Level
Priority Level
PSH
4
Priority Level
Lowest
Highest
Lowest
Highest
PT1H
3
Description
PX1H
2
Rev. F - 15 February, 2001
PT0H
1
PX0H
0