T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 40
T89C51RD2-3CBC-L
Manufacturer Part Number
T89C51RD2-3CBC-L
Description
0 to 40MHz Flash Programmable 8-bit Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.T89C51RD2-3CBC-L.pdf
(86 pages)
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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
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